./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix000.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/mix000.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix000.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix000.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:18:21,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:18:21,085 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:18:21,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:18:21,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:18:21,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:18:21,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:18:21,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:18:21,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:18:21,117 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:18:21,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:18:21,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:18:21,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:18:21,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:18:21,119 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:18:21,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:18:21,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:18:21,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:18:21,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:18:21,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:18:21,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:18:21,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:18:21,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:18:21,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:18:21,122 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:18:21,122 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:18:21,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:18:21,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:18:21,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:18:21,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:18:21,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:18:21,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:18:21,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:18:21,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:18:21,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:18:21,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:18:21,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:18:21,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:18:21,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:18:21,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:18:21,126 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:18:21,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:18:21,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:18:21,126 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:18:21,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:18:21,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:18:21,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:18:21,399 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:18:21,400 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:18:21,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix000.opt.i [2024-06-21 18:18:22,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:18:22,629 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:18:22,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix000.opt.i [2024-06-21 18:18:22,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d85b73c5/6b6283715ff94aafb6c0e5964a8ee2c4/FLAGb5f280919 [2024-06-21 18:18:22,657 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d85b73c5/6b6283715ff94aafb6c0e5964a8ee2c4 [2024-06-21 18:18:22,659 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:18:22,659 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:18:22,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix000.opt.yml/witness.yml [2024-06-21 18:18:22,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:18:22,731 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:18:22,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:18:22,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:18:22,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:18:22,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:18:22" (1/2) ... [2024-06-21 18:18:22,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b09985f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:18:22, skipping insertion in model container [2024-06-21 18:18:22,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:18:22" (1/2) ... [2024-06-21 18:18:22,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b519bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:18:22, skipping insertion in model container [2024-06-21 18:18:22,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:18:22" (2/2) ... [2024-06-21 18:18:22,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b09985f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:22, skipping insertion in model container [2024-06-21 18:18:22,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:18:22" (2/2) ... [2024-06-21 18:18:22,741 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:18:22,761 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:18:22,762 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$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$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:18:22,763 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$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$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:18:22,763 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:18:22,763 INFO L106 edCorrectnessWitness]: ghost_update [L827-L827] multithreaded = 1; [2024-06-21 18:18:22,799 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:18:23,055 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:18:23,063 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:18:23,201 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:18:23,297 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:18:23,298 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23 WrapperNode [2024-06-21 18:18:23,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:18:23,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:18:23,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:18:23,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:18:23,315 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 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,339 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 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,365 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-21 18:18:23,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:18:23,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:18:23,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:18:23,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:18:23,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,395 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:18:23,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,404 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:18:23,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:18:23,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:18:23,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:18:23,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (1/1) ... [2024-06-21 18:18:23,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:18:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:18:23,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:18:23,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:18:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:18:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:18:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:18:23,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:18:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:18:23,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:18:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:18:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:18:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:18:23,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:18:23,486 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:18:23,604 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:18:23,605 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:18:23,914 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:18:23,915 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:18:24,095 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:18:24,095 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:18:24,097 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:18:24 BoogieIcfgContainer [2024-06-21 18:18:24,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:18:24,099 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:18:24,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:18:24,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:18:24,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:18:22" (1/4) ... [2024-06-21 18:18:24,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5df2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:18:24, skipping insertion in model container [2024-06-21 18:18:24,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:18:22" (2/4) ... [2024-06-21 18:18:24,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5df2a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:18:24, skipping insertion in model container [2024-06-21 18:18:24,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:18:23" (3/4) ... [2024-06-21 18:18:24,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5df2a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:18:24, skipping insertion in model container [2024-06-21 18:18:24,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:18:24" (4/4) ... [2024-06-21 18:18:24,108 INFO L112 eAbstractionObserver]: Analyzing ICFG mix000.opt.i [2024-06-21 18:18:24,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:18:24,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 18:18:24,125 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:18:24,172 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:18:24,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 18:18:24,220 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 18:18:24,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:18:24,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:18:24,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 18:18:24,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 18:18:24,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:18:24,236 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;@34b5c1c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:18:24,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 18:18:24,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:18:24,240 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 18:18:24,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:18:24,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:24,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:18:24,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:24,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash 362681797, now seen corresponding path program 1 times [2024-06-21 18:18:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:24,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277493929] [2024-06-21 18:18:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277493929] [2024-06-21 18:18:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277493929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:25,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:18:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264407305] [2024-06-21 18:18:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:25,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:18:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:25,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:18:25,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:18:25,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-21 18:18:25,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:25,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:25,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-21 18:18:25,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:25,525 INFO L124 PetriNetUnfolderBase]: 131/261 cut-off events. [2024-06-21 18:18:25,525 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 18:18:25,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 261 events. 131/261 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1019 event pairs, 75 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 506. Up to 235 conditions per place. [2024-06-21 18:18:25,529 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 18:18:25,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-21 18:18:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:18:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:18:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-21 18:18:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-06-21 18:18:25,539 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 58 transitions. [2024-06-21 18:18:25,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-21 18:18:25,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 18:18:25,542 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 18:18:25,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 18:18:25,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 18:18:25,546 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 18:18:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:25,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:25,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:25,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:18:25,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:25,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 644883556, now seen corresponding path program 1 times [2024-06-21 18:18:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399086606] [2024-06-21 18:18:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:26,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399086606] [2024-06-21 18:18:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399086606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:26,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:18:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907544018] [2024-06-21 18:18:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:18:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:18:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:18:26,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:26,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:26,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:26,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:26,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:26,510 INFO L124 PetriNetUnfolderBase]: 186/341 cut-off events. [2024-06-21 18:18:26,511 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-06-21 18:18:26,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 341 events. 186/341 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1272 event pairs, 94 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 771. Up to 319 conditions per place. [2024-06-21 18:18:26,513 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 18:18:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 159 flow [2024-06-21 18:18:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:18:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:18:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 18:18:26,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-06-21 18:18:26,515 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 69 transitions. [2024-06-21 18:18:26,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 159 flow [2024-06-21 18:18:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:18:26,516 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 18:18:26,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 18:18:26,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 18:18:26,517 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 18:18:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:26,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:26,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:26,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:18:26,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:26,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1483445320, now seen corresponding path program 1 times [2024-06-21 18:18:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760853520] [2024-06-21 18:18:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760853520] [2024-06-21 18:18:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760853520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:27,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:18:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273102744] [2024-06-21 18:18:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:18:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:18:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:18:27,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:27,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:27,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:27,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:27,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:27,637 INFO L124 PetriNetUnfolderBase]: 183/336 cut-off events. [2024-06-21 18:18:27,637 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-06-21 18:18:27,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 336 events. 183/336 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1243 event pairs, 73 based on Foata normal form. 2/337 useless extension candidates. Maximal degree in co-relation 843. Up to 305 conditions per place. [2024-06-21 18:18:27,639 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-06-21 18:18:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 207 flow [2024-06-21 18:18:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:18:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:18:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 18:18:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-06-21 18:18:27,641 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 84 transitions. [2024-06-21 18:18:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 207 flow [2024-06-21 18:18:27,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 198 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:18:27,643 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-21 18:18:27,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-21 18:18:27,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 18:18:27,644 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-21 18:18:27,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:27,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:27,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:27,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:18:27,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:27,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1507186961, now seen corresponding path program 1 times [2024-06-21 18:18:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:27,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797508972] [2024-06-21 18:18:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:28,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797508972] [2024-06-21 18:18:28,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797508972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:28,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:28,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:18:28,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78849261] [2024-06-21 18:18:28,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:28,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:18:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:28,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:18:28,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:18:29,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:29,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:29,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:29,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:29,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:29,260 INFO L124 PetriNetUnfolderBase]: 180/331 cut-off events. [2024-06-21 18:18:29,260 INFO L125 PetriNetUnfolderBase]: For 332/332 co-relation queries the response was YES. [2024-06-21 18:18:29,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 331 events. 180/331 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1211 event pairs, 52 based on Foata normal form. 2/332 useless extension candidates. Maximal degree in co-relation 910. Up to 291 conditions per place. [2024-06-21 18:18:29,262 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2024-06-21 18:18:29,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 255 flow [2024-06-21 18:18:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:18:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:18:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 18:18:29,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-21 18:18:29,264 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 6 states and 99 transitions. [2024-06-21 18:18:29,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 255 flow [2024-06-21 18:18:29,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 240 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:18:29,266 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 143 flow [2024-06-21 18:18:29,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2024-06-21 18:18:29,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 18:18:29,267 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 143 flow [2024-06-21 18:18:29,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:29,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:29,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:29,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:18:29,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:29,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -104928358, now seen corresponding path program 1 times [2024-06-21 18:18:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:29,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014154574] [2024-06-21 18:18:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:29,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:29,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014154574] [2024-06-21 18:18:29,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014154574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:29,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:29,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:18:29,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692593613] [2024-06-21 18:18:29,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:29,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:18:29,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:18:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:18:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:30,165 INFO L124 PetriNetUnfolderBase]: 137/283 cut-off events. [2024-06-21 18:18:30,166 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-06-21 18:18:30,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 283 events. 137/283 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1102 event pairs, 42 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 816. Up to 243 conditions per place. [2024-06-21 18:18:30,167 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2024-06-21 18:18:30,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 235 flow [2024-06-21 18:18:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:18:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:18:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 18:18:30,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 18:18:30,169 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 143 flow. Second operand 6 states and 83 transitions. [2024-06-21 18:18:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 235 flow [2024-06-21 18:18:30,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 212 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:18:30,173 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 166 flow [2024-06-21 18:18:30,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 18:18:30,175 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 18:18:30,177 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 166 flow [2024-06-21 18:18:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:30,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:30,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:30,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:18:30,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:30,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1894897058, now seen corresponding path program 1 times [2024-06-21 18:18:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:30,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957588992] [2024-06-21 18:18:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:31,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957588992] [2024-06-21 18:18:31,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957588992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:31,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:31,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:31,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612711669] [2024-06-21 18:18:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:31,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:31,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:31,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 18:18:31,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:31,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:31,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:31,769 INFO L124 PetriNetUnfolderBase]: 174/320 cut-off events. [2024-06-21 18:18:31,770 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2024-06-21 18:18:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 320 events. 174/320 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1145 event pairs, 29 based on Foata normal form. 4/323 useless extension candidates. Maximal degree in co-relation 998. Up to 262 conditions per place. [2024-06-21 18:18:31,771 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-06-21 18:18:31,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 298 flow [2024-06-21 18:18:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 18:18:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-06-21 18:18:31,773 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 166 flow. Second operand 7 states and 109 transitions. [2024-06-21 18:18:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 298 flow [2024-06-21 18:18:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 285 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 18:18:31,775 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 169 flow [2024-06-21 18:18:31,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=169, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-06-21 18:18:31,776 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-06-21 18:18:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 169 flow [2024-06-21 18:18:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 18:18:31,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:31,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:18:31,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:31,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1042189699, now seen corresponding path program 1 times [2024-06-21 18:18:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269971921] [2024-06-21 18:18:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:33,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:33,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269971921] [2024-06-21 18:18:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269971921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:33,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:33,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:33,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786697275] [2024-06-21 18:18:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:33,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:18:33,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 169 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:33,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:33,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:18:33,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:33,314 INFO L124 PetriNetUnfolderBase]: 129/267 cut-off events. [2024-06-21 18:18:33,314 INFO L125 PetriNetUnfolderBase]: For 679/679 co-relation queries the response was YES. [2024-06-21 18:18:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 267 events. 129/267 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1004 event pairs, 36 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 850. Up to 223 conditions per place. [2024-06-21 18:18:33,316 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 26 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-06-21 18:18:33,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 263 flow [2024-06-21 18:18:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 18:18:33,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 18:18:33,317 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 169 flow. Second operand 7 states and 95 transitions. [2024-06-21 18:18:33,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 263 flow [2024-06-21 18:18:33,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 235 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:18:33,319 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 178 flow [2024-06-21 18:18:33,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-21 18:18:33,320 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-06-21 18:18:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 178 flow [2024-06-21 18:18:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:33,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:33,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:18:33,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash -761076105, now seen corresponding path program 1 times [2024-06-21 18:18:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:33,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418051299] [2024-06-21 18:18:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418051299] [2024-06-21 18:18:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418051299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:34,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:18:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754310681] [2024-06-21 18:18:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:18:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:18:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:18:34,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:34,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:34,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:34,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:34,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:34,336 INFO L124 PetriNetUnfolderBase]: 175/324 cut-off events. [2024-06-21 18:18:34,336 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-21 18:18:34,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 324 events. 175/324 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1162 event pairs, 44 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1093. Up to 296 conditions per place. [2024-06-21 18:18:34,338 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2024-06-21 18:18:34,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 312 flow [2024-06-21 18:18:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-21 18:18:34,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-21 18:18:34,339 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 178 flow. Second operand 7 states and 85 transitions. [2024-06-21 18:18:34,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 312 flow [2024-06-21 18:18:34,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 291 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:18:34,341 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 226 flow [2024-06-21 18:18:34,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-21 18:18:34,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-21 18:18:34,342 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 226 flow [2024-06-21 18:18:34,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:34,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:34,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:18:34,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:34,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1904147891, now seen corresponding path program 2 times [2024-06-21 18:18:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915464067] [2024-06-21 18:18:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:35,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:35,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915464067] [2024-06-21 18:18:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915464067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:35,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:35,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:18:35,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879134668] [2024-06-21 18:18:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:18:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:18:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:18:35,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:35,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:35,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:35,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:35,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:35,374 INFO L124 PetriNetUnfolderBase]: 178/329 cut-off events. [2024-06-21 18:18:35,374 INFO L125 PetriNetUnfolderBase]: For 1219/1219 co-relation queries the response was YES. [2024-06-21 18:18:35,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 329 events. 178/329 cut-off events. For 1219/1219 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1189 event pairs, 46 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 1181. Up to 291 conditions per place. [2024-06-21 18:18:35,376 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2024-06-21 18:18:35,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 378 flow [2024-06-21 18:18:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-21 18:18:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39631336405529954 [2024-06-21 18:18:35,377 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 226 flow. Second operand 7 states and 86 transitions. [2024-06-21 18:18:35,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 378 flow [2024-06-21 18:18:35,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 362 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:18:35,388 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 279 flow [2024-06-21 18:18:35,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-21 18:18:35,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 18:18:35,389 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 279 flow [2024-06-21 18:18:35,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:35,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:35,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:18:35,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:35,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash 480439225, now seen corresponding path program 3 times [2024-06-21 18:18:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299464211] [2024-06-21 18:18:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:36,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299464211] [2024-06-21 18:18:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299464211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:36,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:18:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568501774] [2024-06-21 18:18:36,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:36,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:18:36,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:18:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:18:36,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:36,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:36,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:36,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:36,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:36,246 INFO L124 PetriNetUnfolderBase]: 176/326 cut-off events. [2024-06-21 18:18:36,246 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2024-06-21 18:18:36,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 326 events. 176/326 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1163 event pairs, 43 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1233. Up to 298 conditions per place. [2024-06-21 18:18:36,248 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 39 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-06-21 18:18:36,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 407 flow [2024-06-21 18:18:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 18:18:36,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 18:18:36,250 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 279 flow. Second operand 7 states and 88 transitions. [2024-06-21 18:18:36,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 407 flow [2024-06-21 18:18:36,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 384 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:18:36,253 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 287 flow [2024-06-21 18:18:36,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-21 18:18:36,254 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-21 18:18:36,255 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 287 flow [2024-06-21 18:18:36,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:36,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:36,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:36,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:18:36,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:36,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1106670159, now seen corresponding path program 1 times [2024-06-21 18:18:36,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:36,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445335801] [2024-06-21 18:18:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445335801] [2024-06-21 18:18:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445335801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:37,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947506459] [2024-06-21 18:18:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:37,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:37,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:37,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 287 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:37,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:37,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:37,428 INFO L124 PetriNetUnfolderBase]: 190/354 cut-off events. [2024-06-21 18:18:37,428 INFO L125 PetriNetUnfolderBase]: For 1970/1970 co-relation queries the response was YES. [2024-06-21 18:18:37,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 354 events. 190/354 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1334 event pairs, 51 based on Foata normal form. 2/355 useless extension candidates. Maximal degree in co-relation 1368. Up to 291 conditions per place. [2024-06-21 18:18:37,430 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 41 selfloop transitions, 20 changer transitions 0/64 dead transitions. [2024-06-21 18:18:37,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 483 flow [2024-06-21 18:18:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 18:18:37,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 18:18:37,431 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 287 flow. Second operand 7 states and 95 transitions. [2024-06-21 18:18:37,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 483 flow [2024-06-21 18:18:37,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 436 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:18:37,434 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 340 flow [2024-06-21 18:18:37,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-06-21 18:18:37,435 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-21 18:18:37,435 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 340 flow [2024-06-21 18:18:37,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:37,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:37,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:18:37,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:37,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1106520212, now seen corresponding path program 1 times [2024-06-21 18:18:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090987159] [2024-06-21 18:18:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:38,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090987159] [2024-06-21 18:18:38,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090987159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:38,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12284078] [2024-06-21 18:18:38,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:38,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:38,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 340 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:38,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:38,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:38,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:38,829 INFO L124 PetriNetUnfolderBase]: 193/359 cut-off events. [2024-06-21 18:18:38,829 INFO L125 PetriNetUnfolderBase]: For 2234/2236 co-relation queries the response was YES. [2024-06-21 18:18:38,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 359 events. 193/359 cut-off events. For 2234/2236 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1348 event pairs, 49 based on Foata normal form. 1/359 useless extension candidates. Maximal degree in co-relation 1480. Up to 324 conditions per place. [2024-06-21 18:18:38,831 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 45 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2024-06-21 18:18:38,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 63 transitions, 488 flow [2024-06-21 18:18:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 18:18:38,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 18:18:38,833 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 340 flow. Second operand 8 states and 95 transitions. [2024-06-21 18:18:38,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 63 transitions, 488 flow [2024-06-21 18:18:38,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 63 transitions, 461 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 18:18:38,836 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 362 flow [2024-06-21 18:18:38,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-21 18:18:38,836 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 18:18:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 362 flow [2024-06-21 18:18:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:38,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:38,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:18:38,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:38,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1106520429, now seen corresponding path program 2 times [2024-06-21 18:18:38,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:38,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103591556] [2024-06-21 18:18:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:39,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103591556] [2024-06-21 18:18:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103591556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688029457] [2024-06-21 18:18:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:39,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:39,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 362 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:39,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:40,060 INFO L124 PetriNetUnfolderBase]: 196/365 cut-off events. [2024-06-21 18:18:40,060 INFO L125 PetriNetUnfolderBase]: For 2680/2680 co-relation queries the response was YES. [2024-06-21 18:18:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 365 events. 196/365 cut-off events. For 2680/2680 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1387 event pairs, 40 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 1550. Up to 312 conditions per place. [2024-06-21 18:18:40,063 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 46 selfloop transitions, 20 changer transitions 0/69 dead transitions. [2024-06-21 18:18:40,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 551 flow [2024-06-21 18:18:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 18:18:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-21 18:18:40,064 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 362 flow. Second operand 8 states and 99 transitions. [2024-06-21 18:18:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 551 flow [2024-06-21 18:18:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 518 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:40,069 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 432 flow [2024-06-21 18:18:40,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=432, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2024-06-21 18:18:40,070 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-21 18:18:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 432 flow [2024-06-21 18:18:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:40,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:40,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:40,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:18:40,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:40,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash 816700436, now seen corresponding path program 2 times [2024-06-21 18:18:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:40,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076791363] [2024-06-21 18:18:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:41,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:41,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076791363] [2024-06-21 18:18:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076791363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:41,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:41,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:41,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813823859] [2024-06-21 18:18:41,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:41,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:41,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:41,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:41,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:41,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:41,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:41,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:41,849 INFO L124 PetriNetUnfolderBase]: 199/369 cut-off events. [2024-06-21 18:18:41,850 INFO L125 PetriNetUnfolderBase]: For 3161/3161 co-relation queries the response was YES. [2024-06-21 18:18:41,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 369 events. 199/369 cut-off events. For 3161/3161 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1400 event pairs, 41 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1655. Up to 313 conditions per place. [2024-06-21 18:18:41,852 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 24 changer transitions 0/74 dead transitions. [2024-06-21 18:18:41,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 648 flow [2024-06-21 18:18:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 18:18:41,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 18:18:41,853 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 432 flow. Second operand 8 states and 97 transitions. [2024-06-21 18:18:41,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 648 flow [2024-06-21 18:18:41,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 620 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:18:41,857 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 504 flow [2024-06-21 18:18:41,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=504, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-06-21 18:18:41,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-21 18:18:41,858 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 504 flow [2024-06-21 18:18:41,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:41,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:41,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:41,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:18:41,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:41,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:41,859 INFO L85 PathProgramCache]: Analyzing trace with hash 816692996, now seen corresponding path program 3 times [2024-06-21 18:18:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442188131] [2024-06-21 18:18:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:43,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:43,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442188131] [2024-06-21 18:18:43,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442188131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:43,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:43,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:43,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393610467] [2024-06-21 18:18:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:43,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:43,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 504 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:43,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:43,539 INFO L124 PetriNetUnfolderBase]: 202/374 cut-off events. [2024-06-21 18:18:43,540 INFO L125 PetriNetUnfolderBase]: For 3715/3715 co-relation queries the response was YES. [2024-06-21 18:18:43,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 374 events. 202/374 cut-off events. For 3715/3715 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1403 event pairs, 41 based on Foata normal form. 1/374 useless extension candidates. Maximal degree in co-relation 1771. Up to 330 conditions per place. [2024-06-21 18:18:43,542 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-21 18:18:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 682 flow [2024-06-21 18:18:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 18:18:43,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 18:18:43,544 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 504 flow. Second operand 8 states and 95 transitions. [2024-06-21 18:18:43,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 682 flow [2024-06-21 18:18:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 75 transitions, 645 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 18:18:43,548 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 536 flow [2024-06-21 18:18:43,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=536, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-06-21 18:18:43,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 18:18:43,549 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 536 flow [2024-06-21 18:18:43,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:43,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:43,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:43,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:18:43,549 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:43,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1780489741, now seen corresponding path program 3 times [2024-06-21 18:18:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:43,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650134598] [2024-06-21 18:18:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:44,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:44,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650134598] [2024-06-21 18:18:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650134598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:44,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857575710] [2024-06-21 18:18:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:44,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:44,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 536 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:44,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:44,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:44,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:44,750 INFO L124 PetriNetUnfolderBase]: 210/387 cut-off events. [2024-06-21 18:18:44,750 INFO L125 PetriNetUnfolderBase]: For 4408/4408 co-relation queries the response was YES. [2024-06-21 18:18:44,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 387 events. 210/387 cut-off events. For 4408/4408 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1488 event pairs, 56 based on Foata normal form. 1/387 useless extension candidates. Maximal degree in co-relation 1905. Up to 296 conditions per place. [2024-06-21 18:18:44,752 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 45 selfloop transitions, 33 changer transitions 0/81 dead transitions. [2024-06-21 18:18:44,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 784 flow [2024-06-21 18:18:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 18:18:44,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 18:18:44,754 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 536 flow. Second operand 7 states and 95 transitions. [2024-06-21 18:18:44,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 784 flow [2024-06-21 18:18:44,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 739 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:44,758 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 634 flow [2024-06-21 18:18:44,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-06-21 18:18:44,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-21 18:18:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 634 flow [2024-06-21 18:18:44,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:44,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:18:44,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -131269143, now seen corresponding path program 4 times [2024-06-21 18:18:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:44,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309245017] [2024-06-21 18:18:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309245017] [2024-06-21 18:18:45,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309245017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:45,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:45,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261456310] [2024-06-21 18:18:45,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:45,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:45,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:45,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:45,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:45,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:45,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:45,728 INFO L124 PetriNetUnfolderBase]: 217/399 cut-off events. [2024-06-21 18:18:45,728 INFO L125 PetriNetUnfolderBase]: For 5160/5160 co-relation queries the response was YES. [2024-06-21 18:18:45,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 399 events. 217/399 cut-off events. For 5160/5160 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1530 event pairs, 48 based on Foata normal form. 1/399 useless extension candidates. Maximal degree in co-relation 2099. Up to 351 conditions per place. [2024-06-21 18:18:45,731 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-21 18:18:45,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 882 flow [2024-06-21 18:18:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 18:18:45,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 18:18:45,732 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 634 flow. Second operand 8 states and 101 transitions. [2024-06-21 18:18:45,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 882 flow [2024-06-21 18:18:45,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 841 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:18:45,739 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 684 flow [2024-06-21 18:18:45,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=684, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-06-21 18:18:45,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 18:18:45,740 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 684 flow [2024-06-21 18:18:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:45,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:45,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:18:45,741 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:45,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1538052669, now seen corresponding path program 5 times [2024-06-21 18:18:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643458010] [2024-06-21 18:18:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643458010] [2024-06-21 18:18:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643458010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:46,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:46,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:46,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442399456] [2024-06-21 18:18:46,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:46,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:46,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:46,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:46,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 684 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:46,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:46,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:46,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:46,791 INFO L124 PetriNetUnfolderBase]: 227/419 cut-off events. [2024-06-21 18:18:46,791 INFO L125 PetriNetUnfolderBase]: For 5899/5899 co-relation queries the response was YES. [2024-06-21 18:18:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2311 conditions, 419 events. 227/419 cut-off events. For 5899/5899 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1652 event pairs, 47 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 2267. Up to 346 conditions per place. [2024-06-21 18:18:46,794 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 24 changer transitions 0/94 dead transitions. [2024-06-21 18:18:46,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 950 flow [2024-06-21 18:18:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 18:18:46,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 18:18:46,796 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 684 flow. Second operand 8 states and 105 transitions. [2024-06-21 18:18:46,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 950 flow [2024-06-21 18:18:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 893 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:46,807 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 742 flow [2024-06-21 18:18:46,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=742, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-06-21 18:18:46,807 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 18:18:46,807 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 742 flow [2024-06-21 18:18:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:46,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:46,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:18:46,809 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:46,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1538058249, now seen corresponding path program 6 times [2024-06-21 18:18:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:46,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289094732] [2024-06-21 18:18:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:47,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289094732] [2024-06-21 18:18:47,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289094732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:47,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:18:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537527072] [2024-06-21 18:18:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:18:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:18:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:18:47,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:47,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:47,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:47,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:47,902 INFO L124 PetriNetUnfolderBase]: 225/416 cut-off events. [2024-06-21 18:18:47,902 INFO L125 PetriNetUnfolderBase]: For 6308/6308 co-relation queries the response was YES. [2024-06-21 18:18:47,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2312 conditions, 416 events. 225/416 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1626 event pairs, 50 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 2268. Up to 356 conditions per place. [2024-06-21 18:18:47,905 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 68 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-21 18:18:47,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 991 flow [2024-06-21 18:18:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 18:18:47,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 18:18:47,907 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 742 flow. Second operand 8 states and 101 transitions. [2024-06-21 18:18:47,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 991 flow [2024-06-21 18:18:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 95 transitions, 920 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 18:18:47,914 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 776 flow [2024-06-21 18:18:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=776, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2024-06-21 18:18:47,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-21 18:18:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 776 flow [2024-06-21 18:18:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:47,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:47,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:18:47,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:47,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1538058466, now seen corresponding path program 4 times [2024-06-21 18:18:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:47,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815995693] [2024-06-21 18:18:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:47,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815995693] [2024-06-21 18:18:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815995693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:49,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:49,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819167533] [2024-06-21 18:18:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:49,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:49,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:49,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:49,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:49,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:49,345 INFO L124 PetriNetUnfolderBase]: 223/413 cut-off events. [2024-06-21 18:18:49,346 INFO L125 PetriNetUnfolderBase]: For 6675/6675 co-relation queries the response was YES. [2024-06-21 18:18:49,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2304 conditions, 413 events. 223/413 cut-off events. For 6675/6675 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1633 event pairs, 49 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 2258. Up to 375 conditions per place. [2024-06-21 18:18:49,348 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 78 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-21 18:18:49,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 997 flow [2024-06-21 18:18:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 18:18:49,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 18:18:49,350 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 776 flow. Second operand 8 states and 98 transitions. [2024-06-21 18:18:49,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 997 flow [2024-06-21 18:18:49,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 938 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 18:18:49,357 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 763 flow [2024-06-21 18:18:49,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=763, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2024-06-21 18:18:49,358 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-21 18:18:49,358 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 763 flow [2024-06-21 18:18:49,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:49,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:49,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:18:49,358 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1254297096, now seen corresponding path program 1 times [2024-06-21 18:18:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006857196] [2024-06-21 18:18:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:50,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006857196] [2024-06-21 18:18:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006857196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:50,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137326364] [2024-06-21 18:18:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:50,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:50,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 86 transitions, 763 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:50,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:50,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:50,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:50,907 INFO L124 PetriNetUnfolderBase]: 226/420 cut-off events. [2024-06-21 18:18:50,907 INFO L125 PetriNetUnfolderBase]: For 7154/7154 co-relation queries the response was YES. [2024-06-21 18:18:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 420 events. 226/420 cut-off events. For 7154/7154 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1679 event pairs, 54 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 2290. Up to 342 conditions per place. [2024-06-21 18:18:50,910 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 27 changer transitions 0/97 dead transitions. [2024-06-21 18:18:50,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 997 flow [2024-06-21 18:18:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 18:18:50,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 18:18:50,912 INFO L175 Difference]: Start difference. First operand has 100 places, 86 transitions, 763 flow. Second operand 8 states and 105 transitions. [2024-06-21 18:18:50,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 997 flow [2024-06-21 18:18:50,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 962 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:50,922 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 813 flow [2024-06-21 18:18:50,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=813, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-06-21 18:18:50,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-21 18:18:50,922 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 813 flow [2024-06-21 18:18:50,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:50,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:50,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:18:50,923 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:50,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1254296910, now seen corresponding path program 1 times [2024-06-21 18:18:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2651126] [2024-06-21 18:18:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:52,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2651126] [2024-06-21 18:18:52,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2651126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:52,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398242800] [2024-06-21 18:18:52,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:52,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:52,514 INFO L124 PetriNetUnfolderBase]: 232/432 cut-off events. [2024-06-21 18:18:52,514 INFO L125 PetriNetUnfolderBase]: For 8041/8041 co-relation queries the response was YES. [2024-06-21 18:18:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 432 events. 232/432 cut-off events. For 8041/8041 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1751 event pairs, 43 based on Foata normal form. 2/433 useless extension candidates. Maximal degree in co-relation 2414. Up to 349 conditions per place. [2024-06-21 18:18:52,517 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 69 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-21 18:18:52,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 1057 flow [2024-06-21 18:18:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 18:18:52,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 18:18:52,520 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 813 flow. Second operand 9 states and 113 transitions. [2024-06-21 18:18:52,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 1057 flow [2024-06-21 18:18:52,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:52,529 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 837 flow [2024-06-21 18:18:52,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=837, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2024-06-21 18:18:52,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2024-06-21 18:18:52,530 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 837 flow [2024-06-21 18:18:52,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:52,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:52,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:52,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:18:52,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:52,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1249648522, now seen corresponding path program 1 times [2024-06-21 18:18:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:52,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028999915] [2024-06-21 18:18:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:52,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:54,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:54,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028999915] [2024-06-21 18:18:54,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028999915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:54,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:54,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:54,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648151014] [2024-06-21 18:18:54,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:54,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:54,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:18:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:54,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:54,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:18:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:54,615 INFO L124 PetriNetUnfolderBase]: 235/437 cut-off events. [2024-06-21 18:18:54,615 INFO L125 PetriNetUnfolderBase]: For 8503/8503 co-relation queries the response was YES. [2024-06-21 18:18:54,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2553 conditions, 437 events. 235/437 cut-off events. For 8503/8503 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1771 event pairs, 37 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 2505. Up to 384 conditions per place. [2024-06-21 18:18:54,618 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 79 selfloop transitions, 20 changer transitions 0/102 dead transitions. [2024-06-21 18:18:54,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 1071 flow [2024-06-21 18:18:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 18:18:54,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 18:18:54,620 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 837 flow. Second operand 8 states and 105 transitions. [2024-06-21 18:18:54,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 1071 flow [2024-06-21 18:18:54,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 1000 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:18:54,632 INFO L231 Difference]: Finished difference. Result has 106 places, 93 transitions, 830 flow [2024-06-21 18:18:54,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=106, PETRI_TRANSITIONS=93} [2024-06-21 18:18:54,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-21 18:18:54,633 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 93 transitions, 830 flow [2024-06-21 18:18:54,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:54,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:54,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:54,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:18:54,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:54,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1249648770, now seen corresponding path program 2 times [2024-06-21 18:18:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324567820] [2024-06-21 18:18:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:55,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324567820] [2024-06-21 18:18:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324567820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:55,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:55,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25414059] [2024-06-21 18:18:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:55,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:55,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:55,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:56,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:56,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 93 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:56,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:56,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:56,311 INFO L124 PetriNetUnfolderBase]: 243/448 cut-off events. [2024-06-21 18:18:56,312 INFO L125 PetriNetUnfolderBase]: For 9551/9551 co-relation queries the response was YES. [2024-06-21 18:18:56,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2668 conditions, 448 events. 243/448 cut-off events. For 9551/9551 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1812 event pairs, 44 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 2619. Up to 351 conditions per place. [2024-06-21 18:18:56,315 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-06-21 18:18:56,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 106 transitions, 1144 flow [2024-06-21 18:18:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:18:56,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:18:56,316 INFO L175 Difference]: Start difference. First operand has 106 places, 93 transitions, 830 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:18:56,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 106 transitions, 1144 flow [2024-06-21 18:18:56,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 1098 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:56,327 INFO L231 Difference]: Finished difference. Result has 109 places, 97 transitions, 905 flow [2024-06-21 18:18:56,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=905, PETRI_PLACES=109, PETRI_TRANSITIONS=97} [2024-06-21 18:18:56,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 18:18:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 97 transitions, 905 flow [2024-06-21 18:18:56,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:56,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:56,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:56,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:18:56,328 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:56,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1249655466, now seen corresponding path program 2 times [2024-06-21 18:18:56,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:56,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842448952] [2024-06-21 18:18:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:57,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:57,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842448952] [2024-06-21 18:18:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842448952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:57,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:57,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532042429] [2024-06-21 18:18:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:57,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:57,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 905 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:57,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:57,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:57,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:57,849 INFO L124 PetriNetUnfolderBase]: 246/457 cut-off events. [2024-06-21 18:18:57,850 INFO L125 PetriNetUnfolderBase]: For 10392/10392 co-relation queries the response was YES. [2024-06-21 18:18:57,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 457 events. 246/457 cut-off events. For 10392/10392 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1895 event pairs, 42 based on Foata normal form. 1/457 useless extension candidates. Maximal degree in co-relation 2746. Up to 366 conditions per place. [2024-06-21 18:18:57,853 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 31 changer transitions 0/107 dead transitions. [2024-06-21 18:18:57,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 1161 flow [2024-06-21 18:18:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 18:18:57,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 18:18:57,854 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 905 flow. Second operand 8 states and 106 transitions. [2024-06-21 18:18:57,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 1161 flow [2024-06-21 18:18:57,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 107 transitions, 1107 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:18:57,865 INFO L231 Difference]: Finished difference. Result has 112 places, 99 transitions, 950 flow [2024-06-21 18:18:57,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=112, PETRI_TRANSITIONS=99} [2024-06-21 18:18:57,866 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 18:18:57,866 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 99 transitions, 950 flow [2024-06-21 18:18:57,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:57,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:57,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:18:57,867 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:57,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1249655280, now seen corresponding path program 3 times [2024-06-21 18:18:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:57,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841876063] [2024-06-21 18:18:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:59,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841876063] [2024-06-21 18:18:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841876063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917849690] [2024-06-21 18:18:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:59,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:18:59,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:59,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:59,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:18:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:59,414 INFO L124 PetriNetUnfolderBase]: 244/452 cut-off events. [2024-06-21 18:18:59,414 INFO L125 PetriNetUnfolderBase]: For 10982/10982 co-relation queries the response was YES. [2024-06-21 18:18:59,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 452 events. 244/452 cut-off events. For 10982/10982 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1853 event pairs, 44 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 2792. Up to 366 conditions per place. [2024-06-21 18:18:59,417 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 74 selfloop transitions, 30 changer transitions 0/107 dead transitions. [2024-06-21 18:18:59,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 107 transitions, 1178 flow [2024-06-21 18:18:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 18:18:59,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 18:18:59,419 INFO L175 Difference]: Start difference. First operand has 112 places, 99 transitions, 950 flow. Second operand 9 states and 113 transitions. [2024-06-21 18:18:59,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 107 transitions, 1178 flow [2024-06-21 18:18:59,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 107 transitions, 1089 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:59,431 INFO L231 Difference]: Finished difference. Result has 115 places, 99 transitions, 926 flow [2024-06-21 18:18:59,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=926, PETRI_PLACES=115, PETRI_TRANSITIONS=99} [2024-06-21 18:18:59,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-21 18:18:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 99 transitions, 926 flow [2024-06-21 18:18:59,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:18:59,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:59,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:18:59,432 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:18:59,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash 639400888, now seen corresponding path program 4 times [2024-06-21 18:18:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:59,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917100274] [2024-06-21 18:18:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:01,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:01,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917100274] [2024-06-21 18:19:01,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917100274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:01,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:01,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:01,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418942540] [2024-06-21 18:19:01,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:01,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:01,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:01,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 99 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:01,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:01,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:01,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:01,489 INFO L124 PetriNetUnfolderBase]: 252/465 cut-off events. [2024-06-21 18:19:01,489 INFO L125 PetriNetUnfolderBase]: For 12137/12137 co-relation queries the response was YES. [2024-06-21 18:19:01,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2951 conditions, 465 events. 252/465 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1917 event pairs, 50 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 2898. Up to 344 conditions per place. [2024-06-21 18:19:01,493 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 61 selfloop transitions, 48 changer transitions 0/112 dead transitions. [2024-06-21 18:19:01,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 112 transitions, 1316 flow [2024-06-21 18:19:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:19:01,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:19:01,495 INFO L175 Difference]: Start difference. First operand has 115 places, 99 transitions, 926 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:19:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 112 transitions, 1316 flow [2024-06-21 18:19:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 112 transitions, 1240 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:01,509 INFO L231 Difference]: Finished difference. Result has 116 places, 103 transitions, 1003 flow [2024-06-21 18:19:01,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2024-06-21 18:19:01,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 18:19:01,510 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 1003 flow [2024-06-21 18:19:01,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:01,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:01,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:19:01,510 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:01,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -452319368, now seen corresponding path program 2 times [2024-06-21 18:19:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707728356] [2024-06-21 18:19:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707728356] [2024-06-21 18:19:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707728356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:03,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:03,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:19:03,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304907663] [2024-06-21 18:19:03,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:03,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:19:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:19:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:19:03,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:03,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 1003 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:03,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:03,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:03,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:03,418 INFO L124 PetriNetUnfolderBase]: 255/470 cut-off events. [2024-06-21 18:19:03,418 INFO L125 PetriNetUnfolderBase]: For 13206/13206 co-relation queries the response was YES. [2024-06-21 18:19:03,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3063 conditions, 470 events. 255/470 cut-off events. For 13206/13206 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1923 event pairs, 42 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 3009. Up to 416 conditions per place. [2024-06-21 18:19:03,421 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 90 selfloop transitions, 19 changer transitions 0/112 dead transitions. [2024-06-21 18:19:03,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 112 transitions, 1255 flow [2024-06-21 18:19:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:19:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:19:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 18:19:03,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-21 18:19:03,423 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 1003 flow. Second operand 7 states and 96 transitions. [2024-06-21 18:19:03,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 112 transitions, 1255 flow [2024-06-21 18:19:03,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 112 transitions, 1172 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 18:19:03,438 INFO L231 Difference]: Finished difference. Result has 118 places, 105 transitions, 985 flow [2024-06-21 18:19:03,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=118, PETRI_TRANSITIONS=105} [2024-06-21 18:19:03,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 18:19:03,439 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 105 transitions, 985 flow [2024-06-21 18:19:03,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:03,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:03,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:03,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:19:03,440 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:03,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash -452326312, now seen corresponding path program 3 times [2024-06-21 18:19:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:03,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411984827] [2024-06-21 18:19:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:03,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411984827] [2024-06-21 18:19:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411984827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:04,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:04,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851925478] [2024-06-21 18:19:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:04,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:04,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 105 transitions, 985 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:04,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:04,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:04,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:04,973 INFO L124 PetriNetUnfolderBase]: 258/477 cut-off events. [2024-06-21 18:19:04,973 INFO L125 PetriNetUnfolderBase]: For 13933/13933 co-relation queries the response was YES. [2024-06-21 18:19:04,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3153 conditions, 477 events. 258/477 cut-off events. For 13933/13933 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1987 event pairs, 50 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 3098. Up to 347 conditions per place. [2024-06-21 18:19:04,976 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 46 changer transitions 0/117 dead transitions. [2024-06-21 18:19:04,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 117 transitions, 1351 flow [2024-06-21 18:19:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 18:19:04,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 18:19:04,978 INFO L175 Difference]: Start difference. First operand has 118 places, 105 transitions, 985 flow. Second operand 8 states and 105 transitions. [2024-06-21 18:19:04,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 117 transitions, 1351 flow [2024-06-21 18:19:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 1302 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:19:04,993 INFO L231 Difference]: Finished difference. Result has 121 places, 109 transitions, 1101 flow [2024-06-21 18:19:04,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1101, PETRI_PLACES=121, PETRI_TRANSITIONS=109} [2024-06-21 18:19:04,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 18:19:04,994 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 109 transitions, 1101 flow [2024-06-21 18:19:04,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:04,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:04,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:04,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:19:04,994 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:04,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2126071382, now seen corresponding path program 5 times [2024-06-21 18:19:04,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118847005] [2024-06-21 18:19:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118847005] [2024-06-21 18:19:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118847005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:06,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:06,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530992949] [2024-06-21 18:19:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:06,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:06,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 109 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:06,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:06,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:06,660 INFO L124 PetriNetUnfolderBase]: 256/476 cut-off events. [2024-06-21 18:19:06,660 INFO L125 PetriNetUnfolderBase]: For 14425/14425 co-relation queries the response was YES. [2024-06-21 18:19:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3210 conditions, 476 events. 256/476 cut-off events. For 14425/14425 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2004 event pairs, 48 based on Foata normal form. 1/476 useless extension candidates. Maximal degree in co-relation 3153. Up to 358 conditions per place. [2024-06-21 18:19:06,663 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 69 selfloop transitions, 45 changer transitions 0/117 dead transitions. [2024-06-21 18:19:06,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 117 transitions, 1405 flow [2024-06-21 18:19:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 18:19:06,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 18:19:06,665 INFO L175 Difference]: Start difference. First operand has 121 places, 109 transitions, 1101 flow. Second operand 9 states and 112 transitions. [2024-06-21 18:19:06,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 117 transitions, 1405 flow [2024-06-21 18:19:06,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 1333 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:19:06,680 INFO L231 Difference]: Finished difference. Result has 126 places, 109 transitions, 1124 flow [2024-06-21 18:19:06,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1124, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2024-06-21 18:19:06,681 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-21 18:19:06,681 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 1124 flow [2024-06-21 18:19:06,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:06,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:06,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:06,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:19:06,682 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:06,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -443748488, now seen corresponding path program 3 times [2024-06-21 18:19:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:06,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665537555] [2024-06-21 18:19:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:09,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665537555] [2024-06-21 18:19:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665537555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:09,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975531049] [2024-06-21 18:19:09,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:09,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:09,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 1124 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:09,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:09,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:09,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:09,748 INFO L124 PetriNetUnfolderBase]: 259/481 cut-off events. [2024-06-21 18:19:09,748 INFO L125 PetriNetUnfolderBase]: For 15296/15296 co-relation queries the response was YES. [2024-06-21 18:19:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 481 events. 259/481 cut-off events. For 15296/15296 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2026 event pairs, 49 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 3239. Up to 440 conditions per place. [2024-06-21 18:19:09,751 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 103 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-06-21 18:19:09,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 120 transitions, 1408 flow [2024-06-21 18:19:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 18:19:09,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:19:09,752 INFO L175 Difference]: Start difference. First operand has 126 places, 109 transitions, 1124 flow. Second operand 9 states and 102 transitions. [2024-06-21 18:19:09,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 120 transitions, 1408 flow [2024-06-21 18:19:09,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 120 transitions, 1313 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:09,768 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 1105 flow [2024-06-21 18:19:09,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1105, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2024-06-21 18:19:09,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 18:19:09,768 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 1105 flow [2024-06-21 18:19:09,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:09,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:09,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:19:09,769 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:09,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash -444045406, now seen corresponding path program 6 times [2024-06-21 18:19:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910720517] [2024-06-21 18:19:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910720517] [2024-06-21 18:19:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910720517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:11,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676093519] [2024-06-21 18:19:11,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:11,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:11,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 113 transitions, 1105 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:11,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:11,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:11,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:12,089 INFO L124 PetriNetUnfolderBase]: 267/494 cut-off events. [2024-06-21 18:19:12,089 INFO L125 PetriNetUnfolderBase]: For 16472/16472 co-relation queries the response was YES. [2024-06-21 18:19:12,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3414 conditions, 494 events. 267/494 cut-off events. For 16472/16472 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2096 event pairs, 50 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 3353. Up to 326 conditions per place. [2024-06-21 18:19:12,092 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 64 changer transitions 0/127 dead transitions. [2024-06-21 18:19:12,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 127 transitions, 1567 flow [2024-06-21 18:19:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:19:12,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:19:12,093 INFO L175 Difference]: Start difference. First operand has 128 places, 113 transitions, 1105 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:19:12,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 127 transitions, 1567 flow [2024-06-21 18:19:12,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 127 transitions, 1514 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:19:12,114 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 1293 flow [2024-06-21 18:19:12,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2024-06-21 18:19:12,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-21 18:19:12,115 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 1293 flow [2024-06-21 18:19:12,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:12,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:12,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:12,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:19:12,115 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:12,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2117790414, now seen corresponding path program 4 times [2024-06-21 18:19:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:12,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551694922] [2024-06-21 18:19:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:12,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551694922] [2024-06-21 18:19:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551694922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:19:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836206202] [2024-06-21 18:19:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:19:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:19:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:19:13,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:13,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 1293 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:13,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:13,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:13,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:13,820 INFO L124 PetriNetUnfolderBase]: 265/491 cut-off events. [2024-06-21 18:19:13,820 INFO L125 PetriNetUnfolderBase]: For 17573/17573 co-relation queries the response was YES. [2024-06-21 18:19:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3577 conditions, 491 events. 265/491 cut-off events. For 17573/17573 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2072 event pairs, 42 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 3513. Up to 407 conditions per place. [2024-06-21 18:19:13,823 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 94 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-21 18:19:13,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 127 transitions, 1583 flow [2024-06-21 18:19:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:19:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:19:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-06-21 18:19:13,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45622119815668205 [2024-06-21 18:19:13,824 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 1293 flow. Second operand 7 states and 99 transitions. [2024-06-21 18:19:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 127 transitions, 1583 flow [2024-06-21 18:19:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 127 transitions, 1489 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 18:19:13,848 INFO L231 Difference]: Finished difference. Result has 135 places, 120 transitions, 1294 flow [2024-06-21 18:19:13,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1294, PETRI_PLACES=135, PETRI_TRANSITIONS=120} [2024-06-21 18:19:13,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 18:19:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 120 transitions, 1294 flow [2024-06-21 18:19:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:13,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:13,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:13,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:19:13,849 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:13,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1803526668, now seen corresponding path program 7 times [2024-06-21 18:19:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665962601] [2024-06-21 18:19:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:14,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:14,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665962601] [2024-06-21 18:19:14,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665962601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:14,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:14,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:14,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703258254] [2024-06-21 18:19:14,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:14,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:14,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:15,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:15,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 120 transitions, 1294 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:15,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:15,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:15,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:15,311 INFO L124 PetriNetUnfolderBase]: 271/499 cut-off events. [2024-06-21 18:19:15,312 INFO L125 PetriNetUnfolderBase]: For 18638/18638 co-relation queries the response was YES. [2024-06-21 18:19:15,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 499 events. 271/499 cut-off events. For 18638/18638 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2082 event pairs, 38 based on Foata normal form. 2/500 useless extension candidates. Maximal degree in co-relation 3608. Up to 414 conditions per place. [2024-06-21 18:19:15,314 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2024-06-21 18:19:15,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 1637 flow [2024-06-21 18:19:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:19:15,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:19:15,329 INFO L175 Difference]: Start difference. First operand has 135 places, 120 transitions, 1294 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:19:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 1637 flow [2024-06-21 18:19:15,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 135 transitions, 1558 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:19:15,355 INFO L231 Difference]: Finished difference. Result has 139 places, 123 transitions, 1331 flow [2024-06-21 18:19:15,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1331, PETRI_PLACES=139, PETRI_TRANSITIONS=123} [2024-06-21 18:19:15,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 18:19:15,356 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 123 transitions, 1331 flow [2024-06-21 18:19:15,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:15,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:15,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:15,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:19:15,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:15,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1562642716, now seen corresponding path program 4 times [2024-06-21 18:19:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560623912] [2024-06-21 18:19:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:16,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560623912] [2024-06-21 18:19:16,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560623912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:16,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:16,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270886120] [2024-06-21 18:19:16,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:16,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:16,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 123 transitions, 1331 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:16,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:16,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:16,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:16,424 INFO L124 PetriNetUnfolderBase]: 278/514 cut-off events. [2024-06-21 18:19:16,424 INFO L125 PetriNetUnfolderBase]: For 19587/19587 co-relation queries the response was YES. [2024-06-21 18:19:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 514 events. 278/514 cut-off events. For 19587/19587 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2199 event pairs, 39 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 3739. Up to 433 conditions per place. [2024-06-21 18:19:16,427 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 110 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-21 18:19:16,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 142 transitions, 1715 flow [2024-06-21 18:19:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 18:19:16,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:19:16,430 INFO L175 Difference]: Start difference. First operand has 139 places, 123 transitions, 1331 flow. Second operand 9 states and 114 transitions. [2024-06-21 18:19:16,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 142 transitions, 1715 flow [2024-06-21 18:19:16,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 1628 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:16,457 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 1377 flow [2024-06-21 18:19:16,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2024-06-21 18:19:16,457 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 18:19:16,457 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 1377 flow [2024-06-21 18:19:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:16,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:19:16,458 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:16,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1479605636, now seen corresponding path program 5 times [2024-06-21 18:19:16,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:16,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161385092] [2024-06-21 18:19:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161385092] [2024-06-21 18:19:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161385092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878262050] [2024-06-21 18:19:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:17,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:17,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:17,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:17,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:17,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:17,818 INFO L124 PetriNetUnfolderBase]: 276/511 cut-off events. [2024-06-21 18:19:17,819 INFO L125 PetriNetUnfolderBase]: For 19716/19716 co-relation queries the response was YES. [2024-06-21 18:19:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3747 conditions, 511 events. 276/511 cut-off events. For 19716/19716 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2174 event pairs, 40 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 3679. Up to 430 conditions per place. [2024-06-21 18:19:17,822 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2024-06-21 18:19:17,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 141 transitions, 1691 flow [2024-06-21 18:19:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 18:19:17,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:19:17,823 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 1377 flow. Second operand 9 states and 114 transitions. [2024-06-21 18:19:17,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 141 transitions, 1691 flow [2024-06-21 18:19:17,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 141 transitions, 1607 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:17,856 INFO L231 Difference]: Finished difference. Result has 143 places, 127 transitions, 1352 flow [2024-06-21 18:19:17,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=143, PETRI_TRANSITIONS=127} [2024-06-21 18:19:17,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 18:19:17,856 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 127 transitions, 1352 flow [2024-06-21 18:19:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:17,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:17,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:19:17,857 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:17,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1479468740, now seen corresponding path program 8 times [2024-06-21 18:19:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974349455] [2024-06-21 18:19:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:19,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:19,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974349455] [2024-06-21 18:19:19,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974349455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:19,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253494533] [2024-06-21 18:19:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:19,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 127 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:19,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:19,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:19,417 INFO L124 PetriNetUnfolderBase]: 277/511 cut-off events. [2024-06-21 18:19:19,418 INFO L125 PetriNetUnfolderBase]: For 20960/20960 co-relation queries the response was YES. [2024-06-21 18:19:19,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 511 events. 277/511 cut-off events. For 20960/20960 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2169 event pairs, 39 based on Foata normal form. 2/512 useless extension candidates. Maximal degree in co-relation 3662. Up to 418 conditions per place. [2024-06-21 18:19:19,421 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 33 changer transitions 0/142 dead transitions. [2024-06-21 18:19:19,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 142 transitions, 1700 flow [2024-06-21 18:19:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:19:19,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:19:19,433 INFO L175 Difference]: Start difference. First operand has 143 places, 127 transitions, 1352 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:19:19,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 142 transitions, 1700 flow [2024-06-21 18:19:19,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 1598 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:19,461 INFO L231 Difference]: Finished difference. Result has 145 places, 129 transitions, 1364 flow [2024-06-21 18:19:19,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1364, PETRI_PLACES=145, PETRI_TRANSITIONS=129} [2024-06-21 18:19:19,462 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 18:19:19,462 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 129 transitions, 1364 flow [2024-06-21 18:19:19,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:19,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:19,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:19,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:19:19,462 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:19,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1479461486, now seen corresponding path program 6 times [2024-06-21 18:19:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:19,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756179107] [2024-06-21 18:19:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:19,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756179107] [2024-06-21 18:19:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756179107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:20,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247089211] [2024-06-21 18:19:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:20,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 129 transitions, 1364 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:20,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:20,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:20,805 INFO L124 PetriNetUnfolderBase]: 280/521 cut-off events. [2024-06-21 18:19:20,806 INFO L125 PetriNetUnfolderBase]: For 21178/21178 co-relation queries the response was YES. [2024-06-21 18:19:20,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3799 conditions, 521 events. 280/521 cut-off events. For 21178/21178 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2258 event pairs, 37 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 3730. Up to 428 conditions per place. [2024-06-21 18:19:20,809 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 109 selfloop transitions, 32 changer transitions 0/144 dead transitions. [2024-06-21 18:19:20,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 144 transitions, 1716 flow [2024-06-21 18:19:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 18:19:20,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:19:20,810 INFO L175 Difference]: Start difference. First operand has 145 places, 129 transitions, 1364 flow. Second operand 9 states and 114 transitions. [2024-06-21 18:19:20,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 144 transitions, 1716 flow [2024-06-21 18:19:20,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 144 transitions, 1618 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:20,840 INFO L231 Difference]: Finished difference. Result has 147 places, 131 transitions, 1375 flow [2024-06-21 18:19:20,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1375, PETRI_PLACES=147, PETRI_TRANSITIONS=131} [2024-06-21 18:19:20,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 18:19:20,840 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 131 transitions, 1375 flow [2024-06-21 18:19:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:20,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:20,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:20,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:19:20,841 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:20,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash 98057588, now seen corresponding path program 7 times [2024-06-21 18:19:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:20,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004382417] [2024-06-21 18:19:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004382417] [2024-06-21 18:19:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004382417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:21,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:21,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764986606] [2024-06-21 18:19:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:21,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:21,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 131 transitions, 1375 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:21,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:21,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:21,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:22,140 INFO L124 PetriNetUnfolderBase]: 283/528 cut-off events. [2024-06-21 18:19:22,140 INFO L125 PetriNetUnfolderBase]: For 22237/22237 co-relation queries the response was YES. [2024-06-21 18:19:22,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3838 conditions, 528 events. 283/528 cut-off events. For 22237/22237 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2306 event pairs, 37 based on Foata normal form. 1/528 useless extension candidates. Maximal degree in co-relation 3768. Up to 436 conditions per place. [2024-06-21 18:19:22,144 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 113 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2024-06-21 18:19:22,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 145 transitions, 1731 flow [2024-06-21 18:19:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:19:22,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:19:22,150 INFO L175 Difference]: Start difference. First operand has 147 places, 131 transitions, 1375 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:19:22,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 145 transitions, 1731 flow [2024-06-21 18:19:22,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 145 transitions, 1642 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:22,187 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1393 flow [2024-06-21 18:19:22,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1393, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-21 18:19:22,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-21 18:19:22,189 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1393 flow [2024-06-21 18:19:22,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:22,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:22,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:19:22,189 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:22,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 102705914, now seen corresponding path program 9 times [2024-06-21 18:19:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605626727] [2024-06-21 18:19:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605626727] [2024-06-21 18:19:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605626727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253111692] [2024-06-21 18:19:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:23,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:23,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:23,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1393 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:23,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:23,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:23,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:23,801 INFO L124 PetriNetUnfolderBase]: 286/533 cut-off events. [2024-06-21 18:19:23,801 INFO L125 PetriNetUnfolderBase]: For 23382/23382 co-relation queries the response was YES. [2024-06-21 18:19:23,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 533 events. 286/533 cut-off events. For 23382/23382 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2343 event pairs, 41 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 3820. Up to 405 conditions per place. [2024-06-21 18:19:23,804 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 47 changer transitions 0/147 dead transitions. [2024-06-21 18:19:23,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 1829 flow [2024-06-21 18:19:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 18:19:23,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:19:23,806 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1393 flow. Second operand 9 states and 117 transitions. [2024-06-21 18:19:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 1829 flow [2024-06-21 18:19:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 147 transitions, 1742 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:23,837 INFO L231 Difference]: Finished difference. Result has 151 places, 135 transitions, 1445 flow [2024-06-21 18:19:23,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1445, PETRI_PLACES=151, PETRI_TRANSITIONS=135} [2024-06-21 18:19:23,837 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 18:19:23,837 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 135 transitions, 1445 flow [2024-06-21 18:19:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:23,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:23,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:19:23,838 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:23,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash 435166778, now seen corresponding path program 8 times [2024-06-21 18:19:23,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606461201] [2024-06-21 18:19:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:24,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606461201] [2024-06-21 18:19:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606461201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:24,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:24,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597098302] [2024-06-21 18:19:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:24,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:24,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:24,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:24,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 135 transitions, 1445 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:24,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:24,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:24,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:25,173 INFO L124 PetriNetUnfolderBase]: 284/530 cut-off events. [2024-06-21 18:19:25,173 INFO L125 PetriNetUnfolderBase]: For 23555/23555 co-relation queries the response was YES. [2024-06-21 18:19:25,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3869 conditions, 530 events. 284/530 cut-off events. For 23555/23555 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2316 event pairs, 41 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 3797. Up to 417 conditions per place. [2024-06-21 18:19:25,177 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 104 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-21 18:19:25,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 146 transitions, 1759 flow [2024-06-21 18:19:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 18:19:25,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 18:19:25,185 INFO L175 Difference]: Start difference. First operand has 151 places, 135 transitions, 1445 flow. Second operand 8 states and 107 transitions. [2024-06-21 18:19:25,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 146 transitions, 1759 flow [2024-06-21 18:19:25,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 146 transitions, 1546 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:25,218 INFO L231 Difference]: Finished difference. Result has 150 places, 135 transitions, 1315 flow [2024-06-21 18:19:25,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=150, PETRI_TRANSITIONS=135} [2024-06-21 18:19:25,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 18:19:25,218 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 135 transitions, 1315 flow [2024-06-21 18:19:25,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:25,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:25,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:19:25,219 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:25,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 102699404, now seen corresponding path program 10 times [2024-06-21 18:19:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258905814] [2024-06-21 18:19:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:26,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:26,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258905814] [2024-06-21 18:19:26,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258905814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:26,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:26,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:26,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579503351] [2024-06-21 18:19:26,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:26,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:26,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:26,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 135 transitions, 1315 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:26,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:26,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:26,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:26,847 INFO L124 PetriNetUnfolderBase]: 282/527 cut-off events. [2024-06-21 18:19:26,848 INFO L125 PetriNetUnfolderBase]: For 23657/23657 co-relation queries the response was YES. [2024-06-21 18:19:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3638 conditions, 527 events. 282/527 cut-off events. For 23657/23657 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2309 event pairs, 41 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 3568. Up to 420 conditions per place. [2024-06-21 18:19:26,851 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 38 changer transitions 0/146 dead transitions. [2024-06-21 18:19:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 146 transitions, 1629 flow [2024-06-21 18:19:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 18:19:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:19:26,852 INFO L175 Difference]: Start difference. First operand has 150 places, 135 transitions, 1315 flow. Second operand 9 states and 114 transitions. [2024-06-21 18:19:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 146 transitions, 1629 flow [2024-06-21 18:19:26,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 1441 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:26,882 INFO L231 Difference]: Finished difference. Result has 151 places, 135 transitions, 1208 flow [2024-06-21 18:19:26,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1208, PETRI_PLACES=151, PETRI_TRANSITIONS=135} [2024-06-21 18:19:26,883 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 18:19:26,883 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 135 transitions, 1208 flow [2024-06-21 18:19:26,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:26,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:26,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:19:26,886 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -443737576, now seen corresponding path program 1 times [2024-06-21 18:19:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184707265] [2024-06-21 18:19:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:30,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:30,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184707265] [2024-06-21 18:19:30,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184707265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:30,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843599947] [2024-06-21 18:19:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:30,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:30,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 135 transitions, 1208 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:30,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:30,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:30,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:31,107 INFO L124 PetriNetUnfolderBase]: 262/501 cut-off events. [2024-06-21 18:19:31,108 INFO L125 PetriNetUnfolderBase]: For 23960/23961 co-relation queries the response was YES. [2024-06-21 18:19:31,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 501 events. 262/501 cut-off events. For 23960/23961 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2240 event pairs, 55 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 3249. Up to 418 conditions per place. [2024-06-21 18:19:31,110 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2024-06-21 18:19:31,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 144 transitions, 1480 flow [2024-06-21 18:19:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 18:19:31,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 18:19:31,116 INFO L175 Difference]: Start difference. First operand has 151 places, 135 transitions, 1208 flow. Second operand 9 states and 112 transitions. [2024-06-21 18:19:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 144 transitions, 1480 flow [2024-06-21 18:19:31,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 144 transitions, 1380 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:31,145 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1142 flow [2024-06-21 18:19:31,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1142, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-21 18:19:31,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 18:19:31,145 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1142 flow [2024-06-21 18:19:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:31,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:31,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:19:31,146 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:31,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1780442605, now seen corresponding path program 1 times [2024-06-21 18:19:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50160857] [2024-06-21 18:19:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:32,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:32,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50160857] [2024-06-21 18:19:32,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50160857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:32,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:32,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947099358] [2024-06-21 18:19:32,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1142 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:19:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:33,334 INFO L124 PetriNetUnfolderBase]: 287/538 cut-off events. [2024-06-21 18:19:33,335 INFO L125 PetriNetUnfolderBase]: For 24660/24660 co-relation queries the response was YES. [2024-06-21 18:19:33,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 538 events. 287/538 cut-off events. For 24660/24660 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2385 event pairs, 45 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 3475. Up to 430 conditions per place. [2024-06-21 18:19:33,338 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 35 changer transitions 0/150 dead transitions. [2024-06-21 18:19:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 150 transitions, 1602 flow [2024-06-21 18:19:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:19:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:19:33,339 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1142 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:19:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 150 transitions, 1602 flow [2024-06-21 18:19:33,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 150 transitions, 1547 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:33,373 INFO L231 Difference]: Finished difference. Result has 153 places, 139 transitions, 1218 flow [2024-06-21 18:19:33,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1218, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2024-06-21 18:19:33,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 18:19:33,374 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 1218 flow [2024-06-21 18:19:33,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:19:33,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:33,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:19:33,374 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1780442822, now seen corresponding path program 1 times [2024-06-21 18:19:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239830774] [2024-06-21 18:19:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:34,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:34,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239830774] [2024-06-21 18:19:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239830774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:34,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817860157] [2024-06-21 18:19:34,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:34,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:34,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 139 transitions, 1218 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:34,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:35,252 INFO L124 PetriNetUnfolderBase]: 293/548 cut-off events. [2024-06-21 18:19:35,252 INFO L125 PetriNetUnfolderBase]: For 26905/26905 co-relation queries the response was YES. [2024-06-21 18:19:35,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 548 events. 293/548 cut-off events. For 26905/26905 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2423 event pairs, 29 based on Foata normal form. 2/549 useless extension candidates. Maximal degree in co-relation 3602. Up to 407 conditions per place. [2024-06-21 18:19:35,256 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-21 18:19:35,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 154 transitions, 1592 flow [2024-06-21 18:19:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 18:19:35,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 18:19:35,257 INFO L175 Difference]: Start difference. First operand has 153 places, 139 transitions, 1218 flow. Second operand 9 states and 123 transitions. [2024-06-21 18:19:35,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 154 transitions, 1592 flow [2024-06-21 18:19:35,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 154 transitions, 1529 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:19:35,297 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 1307 flow [2024-06-21 18:19:35,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1307, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2024-06-21 18:19:35,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-21 18:19:35,298 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 1307 flow [2024-06-21 18:19:35,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:35,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:35,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:35,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:19:35,298 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:35,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1641908875, now seen corresponding path program 2 times [2024-06-21 18:19:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064394591] [2024-06-21 18:19:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:36,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:36,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064394591] [2024-06-21 18:19:36,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064394591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:36,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:36,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110130720] [2024-06-21 18:19:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:36,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:37,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:37,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 142 transitions, 1307 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:37,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:37,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:37,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:37,505 INFO L124 PetriNetUnfolderBase]: 291/547 cut-off events. [2024-06-21 18:19:37,505 INFO L125 PetriNetUnfolderBase]: For 25800/25800 co-relation queries the response was YES. [2024-06-21 18:19:37,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 547 events. 291/547 cut-off events. For 25800/25800 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2458 event pairs, 41 based on Foata normal form. 1/547 useless extension candidates. Maximal degree in co-relation 3679. Up to 447 conditions per place. [2024-06-21 18:19:37,509 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 31 changer transitions 0/152 dead transitions. [2024-06-21 18:19:37,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 152 transitions, 1631 flow [2024-06-21 18:19:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 18:19:37,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 18:19:37,510 INFO L175 Difference]: Start difference. First operand has 156 places, 142 transitions, 1307 flow. Second operand 10 states and 122 transitions. [2024-06-21 18:19:37,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 152 transitions, 1631 flow [2024-06-21 18:19:37,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1495 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:37,548 INFO L231 Difference]: Finished difference. Result has 159 places, 142 transitions, 1238 flow [2024-06-21 18:19:37,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1238, PETRI_PLACES=159, PETRI_TRANSITIONS=142} [2024-06-21 18:19:37,549 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-21 18:19:37,549 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 142 transitions, 1238 flow [2024-06-21 18:19:37,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:37,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:37,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:37,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:19:37,549 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:37,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1786006795, now seen corresponding path program 3 times [2024-06-21 18:19:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:37,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924101377] [2024-06-21 18:19:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:39,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924101377] [2024-06-21 18:19:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924101377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:39,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:39,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598774840] [2024-06-21 18:19:39,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:39,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:39,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:39,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:39,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:39,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 142 transitions, 1238 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:39,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:39,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:39,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:39,653 INFO L124 PetriNetUnfolderBase]: 299/562 cut-off events. [2024-06-21 18:19:39,653 INFO L125 PetriNetUnfolderBase]: For 28744/28744 co-relation queries the response was YES. [2024-06-21 18:19:39,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 562 events. 299/562 cut-off events. For 28744/28744 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2526 event pairs, 36 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 3762. Up to 435 conditions per place. [2024-06-21 18:19:39,656 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 42 changer transitions 0/156 dead transitions. [2024-06-21 18:19:39,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 156 transitions, 1724 flow [2024-06-21 18:19:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 18:19:39,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 18:19:39,657 INFO L175 Difference]: Start difference. First operand has 159 places, 142 transitions, 1238 flow. Second operand 10 states and 126 transitions. [2024-06-21 18:19:39,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 156 transitions, 1724 flow [2024-06-21 18:19:39,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 156 transitions, 1649 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:39,710 INFO L231 Difference]: Finished difference. Result has 160 places, 146 transitions, 1320 flow [2024-06-21 18:19:39,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1320, PETRI_PLACES=160, PETRI_TRANSITIONS=146} [2024-06-21 18:19:39,710 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 18:19:39,710 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 146 transitions, 1320 flow [2024-06-21 18:19:39,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:39,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:39,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:19:39,711 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:39,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1786007012, now seen corresponding path program 2 times [2024-06-21 18:19:39,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:39,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790605874] [2024-06-21 18:19:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790605874] [2024-06-21 18:19:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790605874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:41,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:41,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863829734] [2024-06-21 18:19:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:41,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:41,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 146 transitions, 1320 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:41,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:41,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:41,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:41,651 INFO L124 PetriNetUnfolderBase]: 322/599 cut-off events. [2024-06-21 18:19:41,651 INFO L125 PetriNetUnfolderBase]: For 34924/34924 co-relation queries the response was YES. [2024-06-21 18:19:41,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 599 events. 322/599 cut-off events. For 34924/34924 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2724 event pairs, 33 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 4279. Up to 369 conditions per place. [2024-06-21 18:19:41,655 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 71 changer transitions 0/166 dead transitions. [2024-06-21 18:19:41,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 166 transitions, 1982 flow [2024-06-21 18:19:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 18:19:41,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:19:41,657 INFO L175 Difference]: Start difference. First operand has 160 places, 146 transitions, 1320 flow. Second operand 9 states and 126 transitions. [2024-06-21 18:19:41,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 166 transitions, 1982 flow [2024-06-21 18:19:41,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 166 transitions, 1911 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:19:41,712 INFO L231 Difference]: Finished difference. Result has 164 places, 153 transitions, 1544 flow [2024-06-21 18:19:41,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1544, PETRI_PLACES=164, PETRI_TRANSITIONS=153} [2024-06-21 18:19:41,713 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-21 18:19:41,713 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 153 transitions, 1544 flow [2024-06-21 18:19:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:41,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:41,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:19:41,713 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1786014452, now seen corresponding path program 3 times [2024-06-21 18:19:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780526723] [2024-06-21 18:19:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780526723] [2024-06-21 18:19:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780526723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:43,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059466411] [2024-06-21 18:19:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:43,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:43,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 153 transitions, 1544 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:43,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:43,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:43,695 INFO L124 PetriNetUnfolderBase]: 320/596 cut-off events. [2024-06-21 18:19:43,696 INFO L125 PetriNetUnfolderBase]: For 35439/35439 co-relation queries the response was YES. [2024-06-21 18:19:43,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4520 conditions, 596 events. 320/596 cut-off events. For 35439/35439 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2712 event pairs, 33 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 4442. Up to 367 conditions per place. [2024-06-21 18:19:43,699 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 79 changer transitions 0/167 dead transitions. [2024-06-21 18:19:43,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 167 transitions, 2131 flow [2024-06-21 18:19:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 18:19:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:19:43,700 INFO L175 Difference]: Start difference. First operand has 164 places, 153 transitions, 1544 flow. Second operand 9 states and 126 transitions. [2024-06-21 18:19:43,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 167 transitions, 2131 flow [2024-06-21 18:19:43,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 167 transitions, 2021 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 18:19:43,762 INFO L231 Difference]: Finished difference. Result has 170 places, 155 transitions, 1677 flow [2024-06-21 18:19:43,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1677, PETRI_PLACES=170, PETRI_TRANSITIONS=155} [2024-06-21 18:19:43,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-21 18:19:43,763 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 155 transitions, 1677 flow [2024-06-21 18:19:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:19:43,763 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:43,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -84396955, now seen corresponding path program 1 times [2024-06-21 18:19:43,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:43,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354179608] [2024-06-21 18:19:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:43,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354179608] [2024-06-21 18:19:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354179608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:45,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:45,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676721601] [2024-06-21 18:19:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:46,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:46,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 155 transitions, 1677 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:46,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:46,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:46,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:46,467 INFO L124 PetriNetUnfolderBase]: 323/600 cut-off events. [2024-06-21 18:19:46,467 INFO L125 PetriNetUnfolderBase]: For 36918/36918 co-relation queries the response was YES. [2024-06-21 18:19:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 600 events. 323/600 cut-off events. For 36918/36918 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2722 event pairs, 34 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 4657. Up to 528 conditions per place. [2024-06-21 18:19:46,472 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 142 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2024-06-21 18:19:46,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 2053 flow [2024-06-21 18:19:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:19:46,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:19:46,473 INFO L175 Difference]: Start difference. First operand has 170 places, 155 transitions, 1677 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:19:46,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 2053 flow [2024-06-21 18:19:46,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 167 transitions, 1939 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:19:46,538 INFO L231 Difference]: Finished difference. Result has 173 places, 157 transitions, 1640 flow [2024-06-21 18:19:46,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1640, PETRI_PLACES=173, PETRI_TRANSITIONS=157} [2024-06-21 18:19:46,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-21 18:19:46,539 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 157 transitions, 1640 flow [2024-06-21 18:19:46,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:46,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:46,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:19:46,540 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:46,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1785804985, now seen corresponding path program 4 times [2024-06-21 18:19:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:46,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338484901] [2024-06-21 18:19:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338484901] [2024-06-21 18:19:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338484901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:48,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:48,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845928196] [2024-06-21 18:19:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:48,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:48,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:48,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 157 transitions, 1640 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:19:48,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:48,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:48,813 INFO L124 PetriNetUnfolderBase]: 326/606 cut-off events. [2024-06-21 18:19:48,813 INFO L125 PetriNetUnfolderBase]: For 38108/38108 co-relation queries the response was YES. [2024-06-21 18:19:48,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4762 conditions, 606 events. 326/606 cut-off events. For 38108/38108 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2769 event pairs, 35 based on Foata normal form. 1/606 useless extension candidates. Maximal degree in co-relation 4680. Up to 488 conditions per place. [2024-06-21 18:19:48,817 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2024-06-21 18:19:48,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 169 transitions, 2138 flow [2024-06-21 18:19:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 18:19:48,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 18:19:48,818 INFO L175 Difference]: Start difference. First operand has 173 places, 157 transitions, 1640 flow. Second operand 9 states and 119 transitions. [2024-06-21 18:19:48,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 169 transitions, 2138 flow [2024-06-21 18:19:48,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 2067 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:48,891 INFO L231 Difference]: Finished difference. Result has 176 places, 159 transitions, 1702 flow [2024-06-21 18:19:48,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=176, PETRI_TRANSITIONS=159} [2024-06-21 18:19:48,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-21 18:19:48,892 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 159 transitions, 1702 flow [2024-06-21 18:19:48,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:19:48,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:48,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:19:48,892 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:48,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1785799405, now seen corresponding path program 5 times [2024-06-21 18:19:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:48,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446749151] [2024-06-21 18:19:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446749151] [2024-06-21 18:19:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446749151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500256481] [2024-06-21 18:19:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:50,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:50,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:50,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:50,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 159 transitions, 1702 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:50,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:50,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:50,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:51,088 INFO L124 PetriNetUnfolderBase]: 324/603 cut-off events. [2024-06-21 18:19:51,088 INFO L125 PetriNetUnfolderBase]: For 38005/38005 co-relation queries the response was YES. [2024-06-21 18:19:51,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 603 events. 324/603 cut-off events. For 38005/38005 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2776 event pairs, 40 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 4651. Up to 492 conditions per place. [2024-06-21 18:19:51,093 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 130 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-21 18:19:51,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 168 transitions, 2054 flow [2024-06-21 18:19:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:19:51,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:19:51,094 INFO L175 Difference]: Start difference. First operand has 176 places, 159 transitions, 1702 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:19:51,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 168 transitions, 2054 flow [2024-06-21 18:19:51,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 168 transitions, 1936 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:51,157 INFO L231 Difference]: Finished difference. Result has 179 places, 159 transitions, 1659 flow [2024-06-21 18:19:51,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1659, PETRI_PLACES=179, PETRI_TRANSITIONS=159} [2024-06-21 18:19:51,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 18:19:51,158 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 159 transitions, 1659 flow [2024-06-21 18:19:51,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:51,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:51,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:19:51,158 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:51,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1785805202, now seen corresponding path program 4 times [2024-06-21 18:19:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173793765] [2024-06-21 18:19:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173793765] [2024-06-21 18:19:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173793765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984308781] [2024-06-21 18:19:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:52,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:52,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 159 transitions, 1659 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:52,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:52,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:52,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:53,082 INFO L124 PetriNetUnfolderBase]: 322/600 cut-off events. [2024-06-21 18:19:53,082 INFO L125 PetriNetUnfolderBase]: For 38299/38299 co-relation queries the response was YES. [2024-06-21 18:19:53,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4650 conditions, 600 events. 322/600 cut-off events. For 38299/38299 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2741 event pairs, 32 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 4565. Up to 466 conditions per place. [2024-06-21 18:19:53,086 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 120 selfloop transitions, 47 changer transitions 0/170 dead transitions. [2024-06-21 18:19:53,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 170 transitions, 2031 flow [2024-06-21 18:19:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 18:19:53,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 18:19:53,087 INFO L175 Difference]: Start difference. First operand has 179 places, 159 transitions, 1659 flow. Second operand 9 states and 120 transitions. [2024-06-21 18:19:53,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 170 transitions, 2031 flow [2024-06-21 18:19:53,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 170 transitions, 1950 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:53,161 INFO L231 Difference]: Finished difference. Result has 179 places, 160 transitions, 1694 flow [2024-06-21 18:19:53,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1694, PETRI_PLACES=179, PETRI_TRANSITIONS=160} [2024-06-21 18:19:53,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 18:19:53,161 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 160 transitions, 1694 flow [2024-06-21 18:19:53,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:53,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:53,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:19:53,162 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:53,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1449591150, now seen corresponding path program 5 times [2024-06-21 18:19:53,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798599048] [2024-06-21 18:19:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:55,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:55,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798599048] [2024-06-21 18:19:55,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798599048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:55,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826147213] [2024-06-21 18:19:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:55,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:55,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:55,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:19:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 160 transitions, 1694 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:19:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:55,393 INFO L124 PetriNetUnfolderBase]: 348/642 cut-off events. [2024-06-21 18:19:55,393 INFO L125 PetriNetUnfolderBase]: For 46479/46479 co-relation queries the response was YES. [2024-06-21 18:19:55,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5193 conditions, 642 events. 348/642 cut-off events. For 46479/46479 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2967 event pairs, 33 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 5107. Up to 342 conditions per place. [2024-06-21 18:19:55,398 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 105 selfloop transitions, 76 changer transitions 0/184 dead transitions. [2024-06-21 18:19:55,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 184 transitions, 2586 flow [2024-06-21 18:19:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 18:19:55,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:19:55,399 INFO L175 Difference]: Start difference. First operand has 179 places, 160 transitions, 1694 flow. Second operand 8 states and 124 transitions. [2024-06-21 18:19:55,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 184 transitions, 2586 flow [2024-06-21 18:19:55,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 184 transitions, 2478 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:55,486 INFO L231 Difference]: Finished difference. Result has 182 places, 169 transitions, 1922 flow [2024-06-21 18:19:55,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1922, PETRI_PLACES=182, PETRI_TRANSITIONS=169} [2024-06-21 18:19:55,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-21 18:19:55,487 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 169 transitions, 1922 flow [2024-06-21 18:19:55,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:55,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:55,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:19:55,487 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1449591367, now seen corresponding path program 6 times [2024-06-21 18:19:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:55,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464514409] [2024-06-21 18:19:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464514409] [2024-06-21 18:19:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464514409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:57,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:19:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795634576] [2024-06-21 18:19:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:19:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:19:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:19:58,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:19:58,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 169 transitions, 1922 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:58,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:19:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:58,437 INFO L124 PetriNetUnfolderBase]: 351/649 cut-off events. [2024-06-21 18:19:58,437 INFO L125 PetriNetUnfolderBase]: For 47166/47166 co-relation queries the response was YES. [2024-06-21 18:19:58,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5460 conditions, 649 events. 351/649 cut-off events. For 47166/47166 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3017 event pairs, 48 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 5372. Up to 399 conditions per place. [2024-06-21 18:19:58,442 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 88 changer transitions 0/182 dead transitions. [2024-06-21 18:19:58,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 182 transitions, 2492 flow [2024-06-21 18:19:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:19:58,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:19:58,445 INFO L175 Difference]: Start difference. First operand has 182 places, 169 transitions, 1922 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:19:58,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 182 transitions, 2492 flow [2024-06-21 18:19:58,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 182 transitions, 2418 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 18:19:58,532 INFO L231 Difference]: Finished difference. Result has 190 places, 173 transitions, 2117 flow [2024-06-21 18:19:58,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2117, PETRI_PLACES=190, PETRI_TRANSITIONS=173} [2024-06-21 18:19:58,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-21 18:19:58,533 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 173 transitions, 2117 flow [2024-06-21 18:19:58,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:19:58,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:58,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:19:58,533 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:19:58,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1483500277, now seen corresponding path program 7 times [2024-06-21 18:19:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:58,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368451774] [2024-06-21 18:19:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:58,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:00,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368451774] [2024-06-21 18:20:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368451774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:00,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:00,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:00,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021252275] [2024-06-21 18:20:00,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:00,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:00,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 173 transitions, 2117 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:00,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:00,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:00,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:01,394 INFO L124 PetriNetUnfolderBase]: 359/664 cut-off events. [2024-06-21 18:20:01,394 INFO L125 PetriNetUnfolderBase]: For 50867/50867 co-relation queries the response was YES. [2024-06-21 18:20:01,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 664 events. 359/664 cut-off events. For 50867/50867 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3129 event pairs, 48 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 5728. Up to 512 conditions per place. [2024-06-21 18:20:01,400 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 55 changer transitions 0/186 dead transitions. [2024-06-21 18:20:01,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 186 transitions, 2705 flow [2024-06-21 18:20:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:20:01,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:20:01,401 INFO L175 Difference]: Start difference. First operand has 190 places, 173 transitions, 2117 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:20:01,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 186 transitions, 2705 flow [2024-06-21 18:20:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 186 transitions, 2587 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 18:20:01,510 INFO L231 Difference]: Finished difference. Result has 194 places, 177 transitions, 2210 flow [2024-06-21 18:20:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2210, PETRI_PLACES=194, PETRI_TRANSITIONS=177} [2024-06-21 18:20:01,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-21 18:20:01,510 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 177 transitions, 2210 flow [2024-06-21 18:20:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:01,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:20:01,511 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:01,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1137212283, now seen corresponding path program 8 times [2024-06-21 18:20:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098957920] [2024-06-21 18:20:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:03,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:03,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098957920] [2024-06-21 18:20:03,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098957920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:03,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:03,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639136541] [2024-06-21 18:20:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:03,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:03,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:03,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 177 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:03,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:03,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:03,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:03,614 INFO L124 PetriNetUnfolderBase]: 362/671 cut-off events. [2024-06-21 18:20:03,614 INFO L125 PetriNetUnfolderBase]: For 52995/52995 co-relation queries the response was YES. [2024-06-21 18:20:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5946 conditions, 671 events. 362/671 cut-off events. For 52995/52995 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3149 event pairs, 37 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 5853. Up to 512 conditions per place. [2024-06-21 18:20:03,619 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-21 18:20:03,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 187 transitions, 2644 flow [2024-06-21 18:20:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 18:20:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:20:03,620 INFO L175 Difference]: Start difference. First operand has 194 places, 177 transitions, 2210 flow. Second operand 9 states and 114 transitions. [2024-06-21 18:20:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 187 transitions, 2644 flow [2024-06-21 18:20:03,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 187 transitions, 2531 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 18:20:03,730 INFO L231 Difference]: Finished difference. Result has 197 places, 179 transitions, 2266 flow [2024-06-21 18:20:03,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2266, PETRI_PLACES=197, PETRI_TRANSITIONS=179} [2024-06-21 18:20:03,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 18:20:03,731 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 179 transitions, 2266 flow [2024-06-21 18:20:03,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:03,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:03,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:20:03,731 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:03,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1137004676, now seen corresponding path program 6 times [2024-06-21 18:20:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:03,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951433280] [2024-06-21 18:20:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:05,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951433280] [2024-06-21 18:20:05,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951433280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:05,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:05,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420787612] [2024-06-21 18:20:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:05,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:05,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:05,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 179 transitions, 2266 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:05,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:05,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:05,751 INFO L124 PetriNetUnfolderBase]: 370/684 cut-off events. [2024-06-21 18:20:05,751 INFO L125 PetriNetUnfolderBase]: For 56258/56258 co-relation queries the response was YES. [2024-06-21 18:20:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6173 conditions, 684 events. 370/684 cut-off events. For 56258/56258 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3227 event pairs, 37 based on Foata normal form. 1/684 useless extension candidates. Maximal degree in co-relation 6078. Up to 523 conditions per place. [2024-06-21 18:20:05,756 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 139 selfloop transitions, 53 changer transitions 0/195 dead transitions. [2024-06-21 18:20:05,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 195 transitions, 2999 flow [2024-06-21 18:20:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:20:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:20:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 18:20:05,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717741935483871 [2024-06-21 18:20:05,757 INFO L175 Difference]: Start difference. First operand has 197 places, 179 transitions, 2266 flow. Second operand 8 states and 117 transitions. [2024-06-21 18:20:05,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 195 transitions, 2999 flow [2024-06-21 18:20:05,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 195 transitions, 2850 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:05,864 INFO L231 Difference]: Finished difference. Result has 198 places, 185 transitions, 2331 flow [2024-06-21 18:20:05,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=198, PETRI_TRANSITIONS=185} [2024-06-21 18:20:05,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 18:20:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 185 transitions, 2331 flow [2024-06-21 18:20:05,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:05,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:05,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:05,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:20:05,865 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1456942800, now seen corresponding path program 7 times [2024-06-21 18:20:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:05,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508328727] [2024-06-21 18:20:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:05,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:07,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508328727] [2024-06-21 18:20:07,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508328727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:07,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:07,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:07,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821232404] [2024-06-21 18:20:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:07,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 185 transitions, 2331 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:07,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:07,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:07,912 INFO L124 PetriNetUnfolderBase]: 371/686 cut-off events. [2024-06-21 18:20:07,912 INFO L125 PetriNetUnfolderBase]: For 58166/58166 co-relation queries the response was YES. [2024-06-21 18:20:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6161 conditions, 686 events. 371/686 cut-off events. For 58166/58166 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3235 event pairs, 37 based on Foata normal form. 2/687 useless extension candidates. Maximal degree in co-relation 6066. Up to 518 conditions per place. [2024-06-21 18:20:07,920 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 135 selfloop transitions, 57 changer transitions 0/195 dead transitions. [2024-06-21 18:20:07,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 195 transitions, 2777 flow [2024-06-21 18:20:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 18:20:07,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 18:20:07,921 INFO L175 Difference]: Start difference. First operand has 198 places, 185 transitions, 2331 flow. Second operand 9 states and 122 transitions. [2024-06-21 18:20:07,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 195 transitions, 2777 flow [2024-06-21 18:20:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 195 transitions, 2671 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:20:08,053 INFO L231 Difference]: Finished difference. Result has 204 places, 187 transitions, 2395 flow [2024-06-21 18:20:08,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2395, PETRI_PLACES=204, PETRI_TRANSITIONS=187} [2024-06-21 18:20:08,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-21 18:20:08,054 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 187 transitions, 2395 flow [2024-06-21 18:20:08,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:08,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:08,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:20:08,055 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:08,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:08,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1483702087, now seen corresponding path program 9 times [2024-06-21 18:20:08,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:08,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963693138] [2024-06-21 18:20:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:10,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:10,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963693138] [2024-06-21 18:20:10,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963693138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:10,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:10,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:10,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800053452] [2024-06-21 18:20:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:10,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:10,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:10,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:10,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:10,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 187 transitions, 2395 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:10,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:10,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:10,749 INFO L124 PetriNetUnfolderBase]: 369/683 cut-off events. [2024-06-21 18:20:10,749 INFO L125 PetriNetUnfolderBase]: For 56424/56424 co-relation queries the response was YES. [2024-06-21 18:20:10,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 683 events. 369/683 cut-off events. For 56424/56424 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3233 event pairs, 37 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 6085. Up to 518 conditions per place. [2024-06-21 18:20:10,754 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 133 selfloop transitions, 59 changer transitions 0/195 dead transitions. [2024-06-21 18:20:10,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 195 transitions, 2797 flow [2024-06-21 18:20:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:20:10,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:20:10,755 INFO L175 Difference]: Start difference. First operand has 204 places, 187 transitions, 2395 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:20:10,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 195 transitions, 2797 flow [2024-06-21 18:20:10,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 195 transitions, 2633 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:10,866 INFO L231 Difference]: Finished difference. Result has 207 places, 187 transitions, 2354 flow [2024-06-21 18:20:10,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2354, PETRI_PLACES=207, PETRI_TRANSITIONS=187} [2024-06-21 18:20:10,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 18:20:10,867 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 187 transitions, 2354 flow [2024-06-21 18:20:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:20:10,868 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:10,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1456733271, now seen corresponding path program 2 times [2024-06-21 18:20:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:10,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858239255] [2024-06-21 18:20:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:13,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858239255] [2024-06-21 18:20:13,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858239255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:13,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:13,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:13,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930499602] [2024-06-21 18:20:13,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:13,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:13,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:13,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:13,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 187 transitions, 2354 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:13,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:13,426 INFO L124 PetriNetUnfolderBase]: 367/679 cut-off events. [2024-06-21 18:20:13,426 INFO L125 PetriNetUnfolderBase]: For 55809/55809 co-relation queries the response was YES. [2024-06-21 18:20:13,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6084 conditions, 679 events. 367/679 cut-off events. For 55809/55809 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3200 event pairs, 44 based on Foata normal form. 1/679 useless extension candidates. Maximal degree in co-relation 5985. Up to 600 conditions per place. [2024-06-21 18:20:13,432 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-21 18:20:13,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 197 transitions, 2793 flow [2024-06-21 18:20:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:20:13,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:20:13,433 INFO L175 Difference]: Start difference. First operand has 207 places, 187 transitions, 2354 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:20:13,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 197 transitions, 2793 flow [2024-06-21 18:20:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 197 transitions, 2663 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:20:13,538 INFO L231 Difference]: Finished difference. Result has 207 places, 189 transitions, 2310 flow [2024-06-21 18:20:13,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2310, PETRI_PLACES=207, PETRI_TRANSITIONS=189} [2024-06-21 18:20:13,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 18:20:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 189 transitions, 2310 flow [2024-06-21 18:20:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:13,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:13,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:20:13,539 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:13,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1456733550, now seen corresponding path program 8 times [2024-06-21 18:20:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:13,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324728070] [2024-06-21 18:20:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:13,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:15,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:15,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324728070] [2024-06-21 18:20:15,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324728070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:15,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326528518] [2024-06-21 18:20:15,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:15,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:15,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 189 transitions, 2310 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:15,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:15,989 INFO L124 PetriNetUnfolderBase]: 365/677 cut-off events. [2024-06-21 18:20:15,989 INFO L125 PetriNetUnfolderBase]: For 55818/55818 co-relation queries the response was YES. [2024-06-21 18:20:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5968 conditions, 677 events. 365/677 cut-off events. For 55818/55818 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3184 event pairs, 37 based on Foata normal form. 1/677 useless extension candidates. Maximal degree in co-relation 5868. Up to 518 conditions per place. [2024-06-21 18:20:15,995 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 139 selfloop transitions, 55 changer transitions 0/197 dead transitions. [2024-06-21 18:20:15,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 197 transitions, 2716 flow [2024-06-21 18:20:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 18:20:15,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 18:20:15,996 INFO L175 Difference]: Start difference. First operand has 207 places, 189 transitions, 2310 flow. Second operand 9 states and 122 transitions. [2024-06-21 18:20:15,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 197 transitions, 2716 flow [2024-06-21 18:20:16,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 197 transitions, 2631 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:16,113 INFO L231 Difference]: Finished difference. Result has 209 places, 189 transitions, 2340 flow [2024-06-21 18:20:16,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2340, PETRI_PLACES=209, PETRI_TRANSITIONS=189} [2024-06-21 18:20:16,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 18:20:16,114 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 189 transitions, 2340 flow [2024-06-21 18:20:16,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:16,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:16,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:16,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:20:16,114 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:16,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1226991831, now seen corresponding path program 3 times [2024-06-21 18:20:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:16,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155797814] [2024-06-21 18:20:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:18,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155797814] [2024-06-21 18:20:18,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155797814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:18,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217137941] [2024-06-21 18:20:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:18,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:18,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 189 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:18,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:18,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:18,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:18,615 INFO L124 PetriNetUnfolderBase]: 368/681 cut-off events. [2024-06-21 18:20:18,616 INFO L125 PetriNetUnfolderBase]: For 57246/57246 co-relation queries the response was YES. [2024-06-21 18:20:18,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 681 events. 368/681 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3209 event pairs, 43 based on Foata normal form. 1/681 useless extension candidates. Maximal degree in co-relation 5965. Up to 576 conditions per place. [2024-06-21 18:20:18,622 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 163 selfloop transitions, 33 changer transitions 0/199 dead transitions. [2024-06-21 18:20:18,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 199 transitions, 2782 flow [2024-06-21 18:20:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 18:20:18,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 18:20:18,623 INFO L175 Difference]: Start difference. First operand has 209 places, 189 transitions, 2340 flow. Second operand 9 states and 118 transitions. [2024-06-21 18:20:18,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 199 transitions, 2782 flow [2024-06-21 18:20:18,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 199 transitions, 2676 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:18,739 INFO L231 Difference]: Finished difference. Result has 211 places, 191 transitions, 2341 flow [2024-06-21 18:20:18,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2341, PETRI_PLACES=211, PETRI_TRANSITIONS=191} [2024-06-21 18:20:18,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 18:20:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 191 transitions, 2341 flow [2024-06-21 18:20:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:20:18,740 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash -880496726, now seen corresponding path program 9 times [2024-06-21 18:20:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400704635] [2024-06-21 18:20:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:20,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:20,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400704635] [2024-06-21 18:20:20,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400704635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:20,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:20,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402471337] [2024-06-21 18:20:20,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:20,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:20,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:20,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:20,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 191 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:20,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:20,924 INFO L124 PetriNetUnfolderBase]: 374/692 cut-off events. [2024-06-21 18:20:20,924 INFO L125 PetriNetUnfolderBase]: For 61128/61128 co-relation queries the response was YES. [2024-06-21 18:20:20,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 692 events. 374/692 cut-off events. For 61128/61128 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3286 event pairs, 34 based on Foata normal form. 2/693 useless extension candidates. Maximal degree in co-relation 6034. Up to 377 conditions per place. [2024-06-21 18:20:20,931 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 120 selfloop transitions, 83 changer transitions 0/206 dead transitions. [2024-06-21 18:20:20,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 206 transitions, 3101 flow [2024-06-21 18:20:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 18:20:20,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-06-21 18:20:20,932 INFO L175 Difference]: Start difference. First operand has 211 places, 191 transitions, 2341 flow. Second operand 9 states and 132 transitions. [2024-06-21 18:20:20,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 206 transitions, 3101 flow [2024-06-21 18:20:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 206 transitions, 3016 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:21,053 INFO L231 Difference]: Finished difference. Result has 213 places, 193 transitions, 2454 flow [2024-06-21 18:20:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2454, PETRI_PLACES=213, PETRI_TRANSITIONS=193} [2024-06-21 18:20:21,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 18:20:21,054 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 193 transitions, 2454 flow [2024-06-21 18:20:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:21,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:21,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:20:21,055 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:21,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1217795340, now seen corresponding path program 10 times [2024-06-21 18:20:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:21,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172763435] [2024-06-21 18:20:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172763435] [2024-06-21 18:20:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172763435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:23,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:23,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942434102] [2024-06-21 18:20:23,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:23,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:23,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:23,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:23,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 193 transitions, 2454 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:23,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:23,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:23,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:23,791 INFO L124 PetriNetUnfolderBase]: 372/691 cut-off events. [2024-06-21 18:20:23,791 INFO L125 PetriNetUnfolderBase]: For 59333/59333 co-relation queries the response was YES. [2024-06-21 18:20:23,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6184 conditions, 691 events. 372/691 cut-off events. For 59333/59333 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3301 event pairs, 57 based on Foata normal form. 1/691 useless extension candidates. Maximal degree in co-relation 6081. Up to 626 conditions per place. [2024-06-21 18:20:23,797 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 16 changer transitions 0/203 dead transitions. [2024-06-21 18:20:23,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 203 transitions, 2910 flow [2024-06-21 18:20:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 18:20:23,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 18:20:23,798 INFO L175 Difference]: Start difference. First operand has 213 places, 193 transitions, 2454 flow. Second operand 10 states and 112 transitions. [2024-06-21 18:20:23,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 203 transitions, 2910 flow [2024-06-21 18:20:23,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 203 transitions, 2785 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:20:23,908 INFO L231 Difference]: Finished difference. Result has 218 places, 195 transitions, 2408 flow [2024-06-21 18:20:23,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2408, PETRI_PLACES=218, PETRI_TRANSITIONS=195} [2024-06-21 18:20:23,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-21 18:20:23,909 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 195 transitions, 2408 flow [2024-06-21 18:20:23,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:23,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:23,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:20:23,910 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:23,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1217795061, now seen corresponding path program 4 times [2024-06-21 18:20:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:23,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986360383] [2024-06-21 18:20:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:26,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986360383] [2024-06-21 18:20:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986360383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394968380] [2024-06-21 18:20:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:26,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:26,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 195 transitions, 2408 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:26,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:26,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:26,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:27,048 INFO L124 PetriNetUnfolderBase]: 375/696 cut-off events. [2024-06-21 18:20:27,048 INFO L125 PetriNetUnfolderBase]: For 61238/61238 co-relation queries the response was YES. [2024-06-21 18:20:27,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 696 events. 375/696 cut-off events. For 61238/61238 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3312 event pairs, 46 based on Foata normal form. 1/696 useless extension candidates. Maximal degree in co-relation 6033. Up to 624 conditions per place. [2024-06-21 18:20:27,054 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-06-21 18:20:27,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 206 transitions, 3001 flow [2024-06-21 18:20:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 18:20:27,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:20:27,055 INFO L175 Difference]: Start difference. First operand has 218 places, 195 transitions, 2408 flow. Second operand 10 states and 115 transitions. [2024-06-21 18:20:27,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 206 transitions, 3001 flow [2024-06-21 18:20:27,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 206 transitions, 2942 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:20:27,176 INFO L231 Difference]: Finished difference. Result has 220 places, 197 transitions, 2429 flow [2024-06-21 18:20:27,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2429, PETRI_PLACES=220, PETRI_TRANSITIONS=197} [2024-06-21 18:20:27,177 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 18:20:27,177 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 197 transitions, 2429 flow [2024-06-21 18:20:27,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:27,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:27,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:27,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:20:27,177 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -870973247, now seen corresponding path program 5 times [2024-06-21 18:20:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046404869] [2024-06-21 18:20:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:29,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046404869] [2024-06-21 18:20:29,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046404869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:29,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:29,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317447961] [2024-06-21 18:20:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:29,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:29,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:29,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 197 transitions, 2429 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:29,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:29,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:29,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:30,051 INFO L124 PetriNetUnfolderBase]: 373/693 cut-off events. [2024-06-21 18:20:30,051 INFO L125 PetriNetUnfolderBase]: For 60704/60704 co-relation queries the response was YES. [2024-06-21 18:20:30,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6058 conditions, 693 events. 373/693 cut-off events. For 60704/60704 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3301 event pairs, 46 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 5953. Up to 622 conditions per place. [2024-06-21 18:20:30,058 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2024-06-21 18:20:30,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 206 transitions, 2855 flow [2024-06-21 18:20:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:20:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:20:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 18:20:30,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 18:20:30,059 INFO L175 Difference]: Start difference. First operand has 220 places, 197 transitions, 2429 flow. Second operand 11 states and 123 transitions. [2024-06-21 18:20:30,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 206 transitions, 2855 flow [2024-06-21 18:20:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 206 transitions, 2762 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:20:30,193 INFO L231 Difference]: Finished difference. Result has 223 places, 197 transitions, 2381 flow [2024-06-21 18:20:30,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2381, PETRI_PLACES=223, PETRI_TRANSITIONS=197} [2024-06-21 18:20:30,194 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 18:20:30,194 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 197 transitions, 2381 flow [2024-06-21 18:20:30,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:30,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:30,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:20:30,194 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:30,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1381105051, now seen corresponding path program 10 times [2024-06-21 18:20:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:30,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094629321] [2024-06-21 18:20:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:30,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:31,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094629321] [2024-06-21 18:20:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094629321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:31,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:31,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485952166] [2024-06-21 18:20:31,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:31,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:31,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 197 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:31,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:31,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:31,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:32,178 INFO L124 PetriNetUnfolderBase]: 376/697 cut-off events. [2024-06-21 18:20:32,178 INFO L125 PetriNetUnfolderBase]: For 62916/62916 co-relation queries the response was YES. [2024-06-21 18:20:32,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6095 conditions, 697 events. 376/697 cut-off events. For 62916/62916 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3306 event pairs, 24 based on Foata normal form. 1/697 useless extension candidates. Maximal degree in co-relation 5989. Up to 585 conditions per place. [2024-06-21 18:20:32,184 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 34 changer transitions 0/213 dead transitions. [2024-06-21 18:20:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 213 transitions, 2887 flow [2024-06-21 18:20:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:20:32,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:20:32,185 INFO L175 Difference]: Start difference. First operand has 223 places, 197 transitions, 2381 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:20:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 213 transitions, 2887 flow [2024-06-21 18:20:32,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 213 transitions, 2842 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:20:32,308 INFO L231 Difference]: Finished difference. Result has 223 places, 199 transitions, 2463 flow [2024-06-21 18:20:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2463, PETRI_PLACES=223, PETRI_TRANSITIONS=199} [2024-06-21 18:20:32,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 18:20:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 199 transitions, 2463 flow [2024-06-21 18:20:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:32,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:32,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:32,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:20:32,309 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:32,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1381514251, now seen corresponding path program 11 times [2024-06-21 18:20:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104984372] [2024-06-21 18:20:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104984372] [2024-06-21 18:20:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104984372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:33,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583692797] [2024-06-21 18:20:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:34,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:34,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 199 transitions, 2463 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:34,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:34,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:34,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:34,422 INFO L124 PetriNetUnfolderBase]: 379/704 cut-off events. [2024-06-21 18:20:34,422 INFO L125 PetriNetUnfolderBase]: For 65104/65104 co-relation queries the response was YES. [2024-06-21 18:20:34,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6221 conditions, 704 events. 379/704 cut-off events. For 65104/65104 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3352 event pairs, 23 based on Foata normal form. 1/704 useless extension candidates. Maximal degree in co-relation 6114. Up to 579 conditions per place. [2024-06-21 18:20:34,428 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 38 changer transitions 0/215 dead transitions. [2024-06-21 18:20:34,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 215 transitions, 2975 flow [2024-06-21 18:20:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:20:34,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:20:34,429 INFO L175 Difference]: Start difference. First operand has 223 places, 199 transitions, 2463 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:20:34,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 215 transitions, 2975 flow [2024-06-21 18:20:34,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 215 transitions, 2876 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:20:34,565 INFO L231 Difference]: Finished difference. Result has 225 places, 201 transitions, 2501 flow [2024-06-21 18:20:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2501, PETRI_PLACES=225, PETRI_TRANSITIONS=201} [2024-06-21 18:20:34,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 18:20:34,565 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 201 transitions, 2501 flow [2024-06-21 18:20:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:34,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:34,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:20:34,566 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:34,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash 599912931, now seen corresponding path program 12 times [2024-06-21 18:20:34,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:34,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276417226] [2024-06-21 18:20:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:34,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:36,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276417226] [2024-06-21 18:20:36,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276417226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:36,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:36,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:36,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621607058] [2024-06-21 18:20:36,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:36,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:36,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 201 transitions, 2501 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:36,838 INFO L124 PetriNetUnfolderBase]: 387/719 cut-off events. [2024-06-21 18:20:36,839 INFO L125 PetriNetUnfolderBase]: For 69780/69780 co-relation queries the response was YES. [2024-06-21 18:20:36,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6463 conditions, 719 events. 387/719 cut-off events. For 69780/69780 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3450 event pairs, 23 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 6355. Up to 596 conditions per place. [2024-06-21 18:20:36,845 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 35 changer transitions 0/219 dead transitions. [2024-06-21 18:20:36,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 219 transitions, 3217 flow [2024-06-21 18:20:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 18:20:36,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 18:20:36,846 INFO L175 Difference]: Start difference. First operand has 225 places, 201 transitions, 2501 flow. Second operand 10 states and 127 transitions. [2024-06-21 18:20:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 219 transitions, 3217 flow [2024-06-21 18:20:36,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 219 transitions, 3100 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 18:20:36,986 INFO L231 Difference]: Finished difference. Result has 228 places, 205 transitions, 2585 flow [2024-06-21 18:20:36,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2585, PETRI_PLACES=228, PETRI_TRANSITIONS=205} [2024-06-21 18:20:36,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-21 18:20:36,986 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 205 transitions, 2585 flow [2024-06-21 18:20:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:36,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:36,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:20:36,987 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:36,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1255180567, now seen corresponding path program 13 times [2024-06-21 18:20:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356309307] [2024-06-21 18:20:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:38,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:38,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356309307] [2024-06-21 18:20:38,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356309307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:38,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:38,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830351559] [2024-06-21 18:20:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:38,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:38,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 205 transitions, 2585 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:38,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:38,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:38,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:39,350 INFO L124 PetriNetUnfolderBase]: 385/716 cut-off events. [2024-06-21 18:20:39,351 INFO L125 PetriNetUnfolderBase]: For 69106/69106 co-relation queries the response was YES. [2024-06-21 18:20:39,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 716 events. 385/716 cut-off events. For 69106/69106 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3425 event pairs, 23 based on Foata normal form. 1/716 useless extension candidates. Maximal degree in co-relation 6258. Up to 603 conditions per place. [2024-06-21 18:20:39,358 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-21 18:20:39,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 218 transitions, 3049 flow [2024-06-21 18:20:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:20:39,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:20:39,359 INFO L175 Difference]: Start difference. First operand has 228 places, 205 transitions, 2585 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:20:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 218 transitions, 3049 flow [2024-06-21 18:20:39,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 218 transitions, 2908 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:39,517 INFO L231 Difference]: Finished difference. Result has 231 places, 205 transitions, 2511 flow [2024-06-21 18:20:39,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2511, PETRI_PLACES=231, PETRI_TRANSITIONS=205} [2024-06-21 18:20:39,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-21 18:20:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 205 transitions, 2511 flow [2024-06-21 18:20:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:39,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:20:39,518 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:39,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash 759914639, now seen corresponding path program 14 times [2024-06-21 18:20:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491109134] [2024-06-21 18:20:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:41,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491109134] [2024-06-21 18:20:41,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491109134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:41,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329745344] [2024-06-21 18:20:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:41,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:41,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:41,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:41,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 205 transitions, 2511 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:41,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:41,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:41,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:41,888 INFO L124 PetriNetUnfolderBase]: 388/723 cut-off events. [2024-06-21 18:20:41,888 INFO L125 PetriNetUnfolderBase]: For 70849/70849 co-relation queries the response was YES. [2024-06-21 18:20:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6383 conditions, 723 events. 388/723 cut-off events. For 70849/70849 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3485 event pairs, 27 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 6272. Up to 544 conditions per place. [2024-06-21 18:20:41,894 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 156 selfloop transitions, 61 changer transitions 0/220 dead transitions. [2024-06-21 18:20:41,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 220 transitions, 3179 flow [2024-06-21 18:20:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 18:20:41,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 18:20:41,896 INFO L175 Difference]: Start difference. First operand has 231 places, 205 transitions, 2511 flow. Second operand 10 states and 127 transitions. [2024-06-21 18:20:41,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 220 transitions, 3179 flow [2024-06-21 18:20:42,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 220 transitions, 3108 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:20:42,047 INFO L231 Difference]: Finished difference. Result has 232 places, 207 transitions, 2627 flow [2024-06-21 18:20:42,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2627, PETRI_PLACES=232, PETRI_TRANSITIONS=207} [2024-06-21 18:20:42,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 18:20:42,048 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 207 transitions, 2627 flow [2024-06-21 18:20:42,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:42,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:42,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:42,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:20:42,048 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:42,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 605269731, now seen corresponding path program 15 times [2024-06-21 18:20:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:42,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440449599] [2024-06-21 18:20:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:43,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440449599] [2024-06-21 18:20:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440449599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:43,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734106997] [2024-06-21 18:20:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:43,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:43,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 207 transitions, 2627 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:43,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:43,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:43,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:44,015 INFO L124 PetriNetUnfolderBase]: 386/720 cut-off events. [2024-06-21 18:20:44,015 INFO L125 PetriNetUnfolderBase]: For 70294/70294 co-relation queries the response was YES. [2024-06-21 18:20:44,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6365 conditions, 720 events. 386/720 cut-off events. For 70294/70294 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3481 event pairs, 27 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 6253. Up to 584 conditions per place. [2024-06-21 18:20:44,021 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 42 changer transitions 0/219 dead transitions. [2024-06-21 18:20:44,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 219 transitions, 3089 flow [2024-06-21 18:20:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:20:44,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:20:44,022 INFO L175 Difference]: Start difference. First operand has 232 places, 207 transitions, 2627 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:20:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 219 transitions, 3089 flow [2024-06-21 18:20:44,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 219 transitions, 2805 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-21 18:20:44,178 INFO L231 Difference]: Finished difference. Result has 232 places, 207 transitions, 2432 flow [2024-06-21 18:20:44,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2432, PETRI_PLACES=232, PETRI_TRANSITIONS=207} [2024-06-21 18:20:44,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 18:20:44,179 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 207 transitions, 2432 flow [2024-06-21 18:20:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:44,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:44,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:20:44,179 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:44,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 605275311, now seen corresponding path program 16 times [2024-06-21 18:20:44,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:44,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857206834] [2024-06-21 18:20:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857206834] [2024-06-21 18:20:45,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857206834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:45,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:45,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144554838] [2024-06-21 18:20:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:45,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 207 transitions, 2432 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:45,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:45,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:45,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:46,280 INFO L124 PetriNetUnfolderBase]: 384/717 cut-off events. [2024-06-21 18:20:46,280 INFO L125 PetriNetUnfolderBase]: For 68560/68560 co-relation queries the response was YES. [2024-06-21 18:20:46,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6058 conditions, 717 events. 384/717 cut-off events. For 68560/68560 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3467 event pairs, 27 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 5947. Up to 575 conditions per place. [2024-06-21 18:20:46,286 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 44 changer transitions 0/219 dead transitions. [2024-06-21 18:20:46,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 219 transitions, 2894 flow [2024-06-21 18:20:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 18:20:46,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 18:20:46,287 INFO L175 Difference]: Start difference. First operand has 232 places, 207 transitions, 2432 flow. Second operand 9 states and 119 transitions. [2024-06-21 18:20:46,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 219 transitions, 2894 flow [2024-06-21 18:20:46,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 219 transitions, 2720 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 18:20:46,432 INFO L231 Difference]: Finished difference. Result has 231 places, 207 transitions, 2351 flow [2024-06-21 18:20:46,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2351, PETRI_PLACES=231, PETRI_TRANSITIONS=207} [2024-06-21 18:20:46,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-21 18:20:46,433 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 207 transitions, 2351 flow [2024-06-21 18:20:46,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:46,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:46,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:46,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:20:46,433 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:46,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1391052853, now seen corresponding path program 1 times [2024-06-21 18:20:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:46,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455741681] [2024-06-21 18:20:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455741681] [2024-06-21 18:20:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455741681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886799682] [2024-06-21 18:20:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:47,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:47,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 207 transitions, 2351 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:47,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:48,345 INFO L124 PetriNetUnfolderBase]: 388/726 cut-off events. [2024-06-21 18:20:48,345 INFO L125 PetriNetUnfolderBase]: For 72950/72950 co-relation queries the response was YES. [2024-06-21 18:20:48,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6062 conditions, 726 events. 388/726 cut-off events. For 72950/72950 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3544 event pairs, 32 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 5952. Up to 613 conditions per place. [2024-06-21 18:20:48,352 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 190 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-21 18:20:48,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 220 transitions, 2837 flow [2024-06-21 18:20:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 18:20:48,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 18:20:48,353 INFO L175 Difference]: Start difference. First operand has 231 places, 207 transitions, 2351 flow. Second operand 10 states and 121 transitions. [2024-06-21 18:20:48,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 220 transitions, 2837 flow [2024-06-21 18:20:48,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 220 transitions, 2656 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:20:48,520 INFO L231 Difference]: Finished difference. Result has 232 places, 208 transitions, 2250 flow [2024-06-21 18:20:48,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2250, PETRI_PLACES=232, PETRI_TRANSITIONS=208} [2024-06-21 18:20:48,520 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 18:20:48,521 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 208 transitions, 2250 flow [2024-06-21 18:20:48,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:48,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:48,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:48,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:20:48,521 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1388195893, now seen corresponding path program 2 times [2024-06-21 18:20:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110651498] [2024-06-21 18:20:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:49,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:49,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110651498] [2024-06-21 18:20:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110651498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15941042] [2024-06-21 18:20:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:49,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:49,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 208 transitions, 2250 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:49,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:50,294 INFO L124 PetriNetUnfolderBase]: 397/747 cut-off events. [2024-06-21 18:20:50,294 INFO L125 PetriNetUnfolderBase]: For 74742/74742 co-relation queries the response was YES. [2024-06-21 18:20:50,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6038 conditions, 747 events. 397/747 cut-off events. For 74742/74742 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3720 event pairs, 30 based on Foata normal form. 2/748 useless extension candidates. Maximal degree in co-relation 5927. Up to 623 conditions per place. [2024-06-21 18:20:50,301 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 195 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-21 18:20:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 224 transitions, 2756 flow [2024-06-21 18:20:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 18:20:50,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 18:20:50,303 INFO L175 Difference]: Start difference. First operand has 232 places, 208 transitions, 2250 flow. Second operand 10 states and 122 transitions. [2024-06-21 18:20:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 224 transitions, 2756 flow [2024-06-21 18:20:50,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 224 transitions, 2679 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:20:50,444 INFO L231 Difference]: Finished difference. Result has 235 places, 210 transitions, 2261 flow [2024-06-21 18:20:50,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2261, PETRI_PLACES=235, PETRI_TRANSITIONS=210} [2024-06-21 18:20:50,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 18:20:50,445 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 210 transitions, 2261 flow [2024-06-21 18:20:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:50,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:50,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:20:50,445 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:50,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1506344023, now seen corresponding path program 3 times [2024-06-21 18:20:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193829528] [2024-06-21 18:20:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193829528] [2024-06-21 18:20:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193829528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:51,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:51,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:20:51,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208928094] [2024-06-21 18:20:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:51,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:20:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:20:51,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:20:51,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:20:51,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 210 transitions, 2261 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:51,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:51,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:20:51,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:52,146 INFO L124 PetriNetUnfolderBase]: 401/755 cut-off events. [2024-06-21 18:20:52,147 INFO L125 PetriNetUnfolderBase]: For 76859/76859 co-relation queries the response was YES. [2024-06-21 18:20:52,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6099 conditions, 755 events. 401/755 cut-off events. For 76859/76859 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3770 event pairs, 32 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 5987. Up to 634 conditions per place. [2024-06-21 18:20:52,153 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 189 selfloop transitions, 30 changer transitions 0/222 dead transitions. [2024-06-21 18:20:52,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 222 transitions, 2751 flow [2024-06-21 18:20:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:20:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:20:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:20:52,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:20:52,154 INFO L175 Difference]: Start difference. First operand has 235 places, 210 transitions, 2261 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:20:52,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 222 transitions, 2751 flow [2024-06-21 18:20:52,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 222 transitions, 2683 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:52,311 INFO L231 Difference]: Finished difference. Result has 237 places, 211 transitions, 2283 flow [2024-06-21 18:20:52,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2283, PETRI_PLACES=237, PETRI_TRANSITIONS=211} [2024-06-21 18:20:52,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 18:20:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 211 transitions, 2283 flow [2024-06-21 18:20:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:20:52,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:52,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:52,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:20:52,312 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:52,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1506528721, now seen corresponding path program 1 times [2024-06-21 18:20:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:52,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470936138] [2024-06-21 18:20:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:52,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470936138] [2024-06-21 18:20:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470936138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:54,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:54,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:20:54,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788169623] [2024-06-21 18:20:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:20:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:20:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:20:54,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 211 transitions, 2283 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:20:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:54,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:54,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:55,257 INFO L124 PetriNetUnfolderBase]: 402/754 cut-off events. [2024-06-21 18:20:55,258 INFO L125 PetriNetUnfolderBase]: For 75799/75799 co-relation queries the response was YES. [2024-06-21 18:20:55,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 754 events. 402/754 cut-off events. For 75799/75799 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3745 event pairs, 23 based on Foata normal form. 2/755 useless extension candidates. Maximal degree in co-relation 5930. Up to 590 conditions per place. [2024-06-21 18:20:55,264 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 172 selfloop transitions, 51 changer transitions 0/226 dead transitions. [2024-06-21 18:20:55,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 226 transitions, 2795 flow [2024-06-21 18:20:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 18:20:55,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:20:55,266 INFO L175 Difference]: Start difference. First operand has 237 places, 211 transitions, 2283 flow. Second operand 10 states and 135 transitions. [2024-06-21 18:20:55,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 226 transitions, 2795 flow [2024-06-21 18:20:55,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 226 transitions, 2715 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:20:55,418 INFO L231 Difference]: Finished difference. Result has 240 places, 213 transitions, 2349 flow [2024-06-21 18:20:55,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2349, PETRI_PLACES=240, PETRI_TRANSITIONS=213} [2024-06-21 18:20:55,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 18:20:55,418 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 213 transitions, 2349 flow [2024-06-21 18:20:55,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:20:55,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:55,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:55,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:20:55,419 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:55,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1506528473, now seen corresponding path program 1 times [2024-06-21 18:20:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797988776] [2024-06-21 18:20:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:20:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:20:57,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:20:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797988776] [2024-06-21 18:20:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797988776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:20:57,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:20:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:20:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191061421] [2024-06-21 18:20:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:20:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:20:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:20:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:20:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:20:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:20:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 213 transitions, 2349 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:20:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:20:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:20:57,651 INFO L124 PetriNetUnfolderBase]: 423/794 cut-off events. [2024-06-21 18:20:57,651 INFO L125 PetriNetUnfolderBase]: For 86421/86421 co-relation queries the response was YES. [2024-06-21 18:20:57,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6637 conditions, 794 events. 423/794 cut-off events. For 86421/86421 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4019 event pairs, 24 based on Foata normal form. 2/795 useless extension candidates. Maximal degree in co-relation 6523. Up to 565 conditions per place. [2024-06-21 18:20:57,658 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 164 selfloop transitions, 68 changer transitions 0/235 dead transitions. [2024-06-21 18:20:57,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 235 transitions, 3149 flow [2024-06-21 18:20:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:20:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:20:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 18:20:57,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 18:20:57,667 INFO L175 Difference]: Start difference. First operand has 240 places, 213 transitions, 2349 flow. Second operand 10 states and 137 transitions. [2024-06-21 18:20:57,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 235 transitions, 3149 flow [2024-06-21 18:20:57,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 235 transitions, 2924 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 18:20:57,865 INFO L231 Difference]: Finished difference. Result has 241 places, 219 transitions, 2403 flow [2024-06-21 18:20:57,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2403, PETRI_PLACES=241, PETRI_TRANSITIONS=219} [2024-06-21 18:20:57,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 18:20:57,865 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 219 transitions, 2403 flow [2024-06-21 18:20:57,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:20:57,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:20:57,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:20:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:20:57,866 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:20:57,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:20:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1506348983, now seen corresponding path program 2 times [2024-06-21 18:20:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:20:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357766129] [2024-06-21 18:20:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:20:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:20:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357766129] [2024-06-21 18:21:00,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357766129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697361664] [2024-06-21 18:21:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:00,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:00,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 219 transitions, 2403 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:00,877 INFO L124 PetriNetUnfolderBase]: 421/791 cut-off events. [2024-06-21 18:21:00,877 INFO L125 PetriNetUnfolderBase]: For 83607/83607 co-relation queries the response was YES. [2024-06-21 18:21:00,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6544 conditions, 791 events. 421/791 cut-off events. For 83607/83607 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4003 event pairs, 24 based on Foata normal form. 1/791 useless extension candidates. Maximal degree in co-relation 6429. Up to 636 conditions per place. [2024-06-21 18:21:00,884 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-21 18:21:00,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 233 transitions, 2911 flow [2024-06-21 18:21:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 18:21:00,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 18:21:00,885 INFO L175 Difference]: Start difference. First operand has 241 places, 219 transitions, 2403 flow. Second operand 10 states and 132 transitions. [2024-06-21 18:21:00,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 233 transitions, 2911 flow [2024-06-21 18:21:01,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 233 transitions, 2716 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:01,072 INFO L231 Difference]: Finished difference. Result has 243 places, 220 transitions, 2333 flow [2024-06-21 18:21:01,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2333, PETRI_PLACES=243, PETRI_TRANSITIONS=220} [2024-06-21 18:21:01,072 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 18:21:01,072 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 220 transitions, 2333 flow [2024-06-21 18:21:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:01,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:01,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:01,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:21:01,073 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:01,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1506521963, now seen corresponding path program 3 times [2024-06-21 18:21:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:01,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578641009] [2024-06-21 18:21:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:01,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:02,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578641009] [2024-06-21 18:21:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578641009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:02,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:02,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:21:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607550347] [2024-06-21 18:21:02,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:02,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:21:02,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:21:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:21:02,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:21:02,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 220 transitions, 2333 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:02,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:02,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:21:02,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:03,246 INFO L124 PetriNetUnfolderBase]: 419/788 cut-off events. [2024-06-21 18:21:03,246 INFO L125 PetriNetUnfolderBase]: For 81116/81116 co-relation queries the response was YES. [2024-06-21 18:21:03,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 788 events. 419/788 cut-off events. For 81116/81116 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4003 event pairs, 33 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 6168. Up to 563 conditions per place. [2024-06-21 18:21:03,252 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 166 selfloop transitions, 66 changer transitions 0/236 dead transitions. [2024-06-21 18:21:03,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 236 transitions, 3036 flow [2024-06-21 18:21:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:21:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:21:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 18:21:03,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2024-06-21 18:21:03,253 INFO L175 Difference]: Start difference. First operand has 243 places, 220 transitions, 2333 flow. Second operand 9 states and 138 transitions. [2024-06-21 18:21:03,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 236 transitions, 3036 flow [2024-06-21 18:21:03,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 236 transitions, 2919 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:03,409 INFO L231 Difference]: Finished difference. Result has 244 places, 222 transitions, 2402 flow [2024-06-21 18:21:03,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2402, PETRI_PLACES=244, PETRI_TRANSITIONS=222} [2024-06-21 18:21:03,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 18:21:03,410 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 222 transitions, 2402 flow [2024-06-21 18:21:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:03,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:03,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:03,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:21:03,410 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:03,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1671983157, now seen corresponding path program 4 times [2024-06-21 18:21:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:03,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292710973] [2024-06-21 18:21:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:04,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292710973] [2024-06-21 18:21:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292710973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:04,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:04,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:21:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096743447] [2024-06-21 18:21:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:21:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:21:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:21:04,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:21:04,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 222 transitions, 2402 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:21:04,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:04,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:21:04,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:05,356 INFO L124 PetriNetUnfolderBase]: 423/797 cut-off events. [2024-06-21 18:21:05,356 INFO L125 PetriNetUnfolderBase]: For 87708/87708 co-relation queries the response was YES. [2024-06-21 18:21:05,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6413 conditions, 797 events. 423/797 cut-off events. For 87708/87708 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4064 event pairs, 29 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 6298. Up to 663 conditions per place. [2024-06-21 18:21:05,363 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 196 selfloop transitions, 34 changer transitions 0/233 dead transitions. [2024-06-21 18:21:05,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 233 transitions, 2912 flow [2024-06-21 18:21:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:21:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:21:05,364 INFO L175 Difference]: Start difference. First operand has 244 places, 222 transitions, 2402 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:21:05,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 233 transitions, 2912 flow [2024-06-21 18:21:05,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 233 transitions, 2776 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 18:21:05,537 INFO L231 Difference]: Finished difference. Result has 248 places, 223 transitions, 2366 flow [2024-06-21 18:21:05,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2366, PETRI_PLACES=248, PETRI_TRANSITIONS=223} [2024-06-21 18:21:05,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 18:21:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 223 transitions, 2366 flow [2024-06-21 18:21:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:21:05,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:05,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:21:05,538 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:05,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -468116593, now seen corresponding path program 1 times [2024-06-21 18:21:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:05,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605204854] [2024-06-21 18:21:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605204854] [2024-06-21 18:21:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605204854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024357575] [2024-06-21 18:21:07,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:07,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:07,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:08,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:08,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 223 transitions, 2366 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:08,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:08,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:08,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:08,464 INFO L124 PetriNetUnfolderBase]: 427/804 cut-off events. [2024-06-21 18:21:08,465 INFO L125 PetriNetUnfolderBase]: For 89990/89990 co-relation queries the response was YES. [2024-06-21 18:21:08,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6428 conditions, 804 events. 427/804 cut-off events. For 89990/89990 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4096 event pairs, 34 based on Foata normal form. 2/805 useless extension candidates. Maximal degree in co-relation 6311. Up to 706 conditions per place. [2024-06-21 18:21:08,470 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 210 selfloop transitions, 23 changer transitions 0/236 dead transitions. [2024-06-21 18:21:08,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 236 transitions, 2886 flow [2024-06-21 18:21:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 18:21:08,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 18:21:08,471 INFO L175 Difference]: Start difference. First operand has 248 places, 223 transitions, 2366 flow. Second operand 10 states and 127 transitions. [2024-06-21 18:21:08,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 236 transitions, 2886 flow [2024-06-21 18:21:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 236 transitions, 2796 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:08,650 INFO L231 Difference]: Finished difference. Result has 250 places, 224 transitions, 2354 flow [2024-06-21 18:21:08,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2354, PETRI_PLACES=250, PETRI_TRANSITIONS=224} [2024-06-21 18:21:08,650 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 18:21:08,650 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 224 transitions, 2354 flow [2024-06-21 18:21:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:08,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:08,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:21:08,651 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:08,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -468116903, now seen corresponding path program 2 times [2024-06-21 18:21:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003266130] [2024-06-21 18:21:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003266130] [2024-06-21 18:21:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003266130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:11,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:11,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:11,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064788765] [2024-06-21 18:21:11,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:11,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:11,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:11,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 224 transitions, 2354 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:11,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:11,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:11,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:11,709 INFO L124 PetriNetUnfolderBase]: 435/819 cut-off events. [2024-06-21 18:21:11,709 INFO L125 PetriNetUnfolderBase]: For 91968/91968 co-relation queries the response was YES. [2024-06-21 18:21:11,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 819 events. 435/819 cut-off events. For 91968/91968 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4194 event pairs, 25 based on Foata normal form. 1/819 useless extension candidates. Maximal degree in co-relation 6475. Up to 585 conditions per place. [2024-06-21 18:21:11,718 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 160 selfloop transitions, 77 changer transitions 0/240 dead transitions. [2024-06-21 18:21:11,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 240 transitions, 3094 flow [2024-06-21 18:21:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:21:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 18:21:11,719 INFO L175 Difference]: Start difference. First operand has 250 places, 224 transitions, 2354 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:21:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 240 transitions, 3094 flow [2024-06-21 18:21:11,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 240 transitions, 3026 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:11,901 INFO L231 Difference]: Finished difference. Result has 252 places, 228 transitions, 2521 flow [2024-06-21 18:21:11,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2521, PETRI_PLACES=252, PETRI_TRANSITIONS=228} [2024-06-21 18:21:11,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 18:21:11,901 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 228 transitions, 2521 flow [2024-06-21 18:21:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:11,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:11,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:21:11,902 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:11,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash -863334189, now seen corresponding path program 3 times [2024-06-21 18:21:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997018826] [2024-06-21 18:21:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997018826] [2024-06-21 18:21:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997018826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:13,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530049008] [2024-06-21 18:21:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:14,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:14,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 228 transitions, 2521 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:14,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:14,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:14,481 INFO L124 PetriNetUnfolderBase]: 442/830 cut-off events. [2024-06-21 18:21:14,481 INFO L125 PetriNetUnfolderBase]: For 97237/97237 co-relation queries the response was YES. [2024-06-21 18:21:14,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 830 events. 442/830 cut-off events. For 97237/97237 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4259 event pairs, 25 based on Foata normal form. 2/831 useless extension candidates. Maximal degree in co-relation 6693. Up to 642 conditions per place. [2024-06-21 18:21:14,487 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 62 changer transitions 0/244 dead transitions. [2024-06-21 18:21:14,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 244 transitions, 3275 flow [2024-06-21 18:21:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 18:21:14,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-21 18:21:14,488 INFO L175 Difference]: Start difference. First operand has 252 places, 228 transitions, 2521 flow. Second operand 10 states and 136 transitions. [2024-06-21 18:21:14,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 244 transitions, 3275 flow [2024-06-21 18:21:14,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 244 transitions, 3137 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 18:21:14,691 INFO L231 Difference]: Finished difference. Result has 256 places, 232 transitions, 2599 flow [2024-06-21 18:21:14,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2599, PETRI_PLACES=256, PETRI_TRANSITIONS=232} [2024-06-21 18:21:14,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 18:21:14,692 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 232 transitions, 2599 flow [2024-06-21 18:21:14,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:14,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:14,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:14,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:21:14,693 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:14,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1286697297, now seen corresponding path program 4 times [2024-06-21 18:21:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:14,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701195926] [2024-06-21 18:21:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701195926] [2024-06-21 18:21:16,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701195926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:16,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:16,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710726706] [2024-06-21 18:21:16,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:16,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:16,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:16,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 232 transitions, 2599 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:17,438 INFO L124 PetriNetUnfolderBase]: 469/875 cut-off events. [2024-06-21 18:21:17,438 INFO L125 PetriNetUnfolderBase]: For 112842/112842 co-relation queries the response was YES. [2024-06-21 18:21:17,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 875 events. 469/875 cut-off events. For 112842/112842 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4528 event pairs, 37 based on Foata normal form. 2/876 useless extension candidates. Maximal degree in co-relation 7539. Up to 512 conditions per place. [2024-06-21 18:21:17,447 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 143 selfloop transitions, 109 changer transitions 0/255 dead transitions. [2024-06-21 18:21:17,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 255 transitions, 3679 flow [2024-06-21 18:21:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 18:21:17,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2024-06-21 18:21:17,448 INFO L175 Difference]: Start difference. First operand has 256 places, 232 transitions, 2599 flow. Second operand 10 states and 141 transitions. [2024-06-21 18:21:17,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 255 transitions, 3679 flow [2024-06-21 18:21:17,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 255 transitions, 3431 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-21 18:21:17,704 INFO L231 Difference]: Finished difference. Result has 257 places, 241 transitions, 2777 flow [2024-06-21 18:21:17,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2777, PETRI_PLACES=257, PETRI_TRANSITIONS=241} [2024-06-21 18:21:17,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 18:21:17,705 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 241 transitions, 2777 flow [2024-06-21 18:21:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:17,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:17,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:21:17,705 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:17,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1671988117, now seen corresponding path program 5 times [2024-06-21 18:21:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60965549] [2024-06-21 18:21:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:19,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:19,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60965549] [2024-06-21 18:21:19,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60965549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:19,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:19,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101462651] [2024-06-21 18:21:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:19,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:19,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:19,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 241 transitions, 2777 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:19,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:19,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:19,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:20,043 INFO L124 PetriNetUnfolderBase]: 466/874 cut-off events. [2024-06-21 18:21:20,044 INFO L125 PetriNetUnfolderBase]: For 109647/109647 co-relation queries the response was YES. [2024-06-21 18:21:20,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7621 conditions, 874 events. 466/874 cut-off events. For 109647/109647 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4559 event pairs, 27 based on Foata normal form. 1/874 useless extension candidates. Maximal degree in co-relation 7499. Up to 700 conditions per place. [2024-06-21 18:21:20,052 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 195 selfloop transitions, 54 changer transitions 0/252 dead transitions. [2024-06-21 18:21:20,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 252 transitions, 3301 flow [2024-06-21 18:21:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 18:21:20,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 18:21:20,053 INFO L175 Difference]: Start difference. First operand has 257 places, 241 transitions, 2777 flow. Second operand 10 states and 131 transitions. [2024-06-21 18:21:20,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 252 transitions, 3301 flow [2024-06-21 18:21:20,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 252 transitions, 3093 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 18:21:20,312 INFO L231 Difference]: Finished difference. Result has 262 places, 241 transitions, 2683 flow [2024-06-21 18:21:20,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2683, PETRI_PLACES=262, PETRI_TRANSITIONS=241} [2024-06-21 18:21:20,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 18:21:20,312 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 241 transitions, 2683 flow [2024-06-21 18:21:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:20,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:20,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:20,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:21:20,313 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:20,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -468355913, now seen corresponding path program 4 times [2024-06-21 18:21:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930452870] [2024-06-21 18:21:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:22,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930452870] [2024-06-21 18:21:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930452870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387963136] [2024-06-21 18:21:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:22,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:22,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 241 transitions, 2683 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:22,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:22,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:22,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:23,257 INFO L124 PetriNetUnfolderBase]: 464/871 cut-off events. [2024-06-21 18:21:23,257 INFO L125 PetriNetUnfolderBase]: For 106990/106990 co-relation queries the response was YES. [2024-06-21 18:21:23,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7412 conditions, 871 events. 464/871 cut-off events. For 106990/106990 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4542 event pairs, 36 based on Foata normal form. 1/871 useless extension candidates. Maximal degree in co-relation 7288. Up to 650 conditions per place. [2024-06-21 18:21:23,266 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 183 selfloop transitions, 66 changer transitions 0/252 dead transitions. [2024-06-21 18:21:23,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 252 transitions, 3207 flow [2024-06-21 18:21:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 18:21:23,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:21:23,267 INFO L175 Difference]: Start difference. First operand has 262 places, 241 transitions, 2683 flow. Second operand 10 states and 135 transitions. [2024-06-21 18:21:23,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 252 transitions, 3207 flow [2024-06-21 18:21:23,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 252 transitions, 3093 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 18:21:23,503 INFO L231 Difference]: Finished difference. Result has 263 places, 241 transitions, 2706 flow [2024-06-21 18:21:23,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2706, PETRI_PLACES=263, PETRI_TRANSITIONS=241} [2024-06-21 18:21:23,503 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-21 18:21:23,504 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 241 transitions, 2706 flow [2024-06-21 18:21:23,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:23,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:23,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:23,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:21:23,504 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:23,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash -468356161, now seen corresponding path program 6 times [2024-06-21 18:21:23,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:23,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763644701] [2024-06-21 18:21:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:23,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:25,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763644701] [2024-06-21 18:21:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763644701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:25,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621479485] [2024-06-21 18:21:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:25,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:25,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:25,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:25,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 241 transitions, 2706 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:25,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:25,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:26,151 INFO L124 PetriNetUnfolderBase]: 480/901 cut-off events. [2024-06-21 18:21:26,151 INFO L125 PetriNetUnfolderBase]: For 120915/120915 co-relation queries the response was YES. [2024-06-21 18:21:26,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7906 conditions, 901 events. 480/901 cut-off events. For 120915/120915 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4735 event pairs, 36 based on Foata normal form. 2/902 useless extension candidates. Maximal degree in co-relation 7781. Up to 523 conditions per place. [2024-06-21 18:21:26,159 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 97 changer transitions 0/262 dead transitions. [2024-06-21 18:21:26,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 262 transitions, 3942 flow [2024-06-21 18:21:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-21 18:21:26,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-06-21 18:21:26,161 INFO L175 Difference]: Start difference. First operand has 263 places, 241 transitions, 2706 flow. Second operand 10 states and 144 transitions. [2024-06-21 18:21:26,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 262 transitions, 3942 flow [2024-06-21 18:21:26,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 262 transitions, 3777 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:21:26,502 INFO L231 Difference]: Finished difference. Result has 264 places, 246 transitions, 2850 flow [2024-06-21 18:21:26,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2850, PETRI_PLACES=264, PETRI_TRANSITIONS=246} [2024-06-21 18:21:26,502 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 18:21:26,502 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 246 transitions, 2850 flow [2024-06-21 18:21:26,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:26,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:26,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:26,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:21:26,503 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:26,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -468362671, now seen corresponding path program 7 times [2024-06-21 18:21:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:26,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647104484] [2024-06-21 18:21:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:28,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647104484] [2024-06-21 18:21:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647104484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890356802] [2024-06-21 18:21:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:28,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:28,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:28,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:28,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 246 transitions, 2850 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:28,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:28,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:29,434 INFO L124 PetriNetUnfolderBase]: 478/896 cut-off events. [2024-06-21 18:21:29,434 INFO L125 PetriNetUnfolderBase]: For 116783/116783 co-relation queries the response was YES. [2024-06-21 18:21:29,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 896 events. 478/896 cut-off events. For 116783/116783 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4673 event pairs, 26 based on Foata normal form. 1/896 useless extension candidates. Maximal degree in co-relation 7757. Up to 584 conditions per place. [2024-06-21 18:21:29,442 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 172 selfloop transitions, 90 changer transitions 0/265 dead transitions. [2024-06-21 18:21:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 265 transitions, 3737 flow [2024-06-21 18:21:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 18:21:29,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 18:21:29,443 INFO L175 Difference]: Start difference. First operand has 264 places, 246 transitions, 2850 flow. Second operand 10 states and 137 transitions. [2024-06-21 18:21:29,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 265 transitions, 3737 flow [2024-06-21 18:21:29,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 265 transitions, 3513 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 18:21:29,725 INFO L231 Difference]: Finished difference. Result has 270 places, 253 transitions, 3039 flow [2024-06-21 18:21:29,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3039, PETRI_PLACES=270, PETRI_TRANSITIONS=253} [2024-06-21 18:21:29,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 18:21:29,726 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 253 transitions, 3039 flow [2024-06-21 18:21:29,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:29,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:29,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:29,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:21:29,726 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:29,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash -468125273, now seen corresponding path program 5 times [2024-06-21 18:21:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:29,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033097760] [2024-06-21 18:21:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:32,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:32,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033097760] [2024-06-21 18:21:32,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033097760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:32,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:32,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268297961] [2024-06-21 18:21:32,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:32,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:32,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:32,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 253 transitions, 3039 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:32,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:32,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:32,631 INFO L124 PetriNetUnfolderBase]: 475/892 cut-off events. [2024-06-21 18:21:32,631 INFO L125 PetriNetUnfolderBase]: For 115800/115800 co-relation queries the response was YES. [2024-06-21 18:21:32,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 892 events. 475/892 cut-off events. For 115800/115800 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4681 event pairs, 36 based on Foata normal form. 1/892 useless extension candidates. Maximal degree in co-relation 7692. Up to 668 conditions per place. [2024-06-21 18:21:32,639 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 190 selfloop transitions, 71 changer transitions 0/264 dead transitions. [2024-06-21 18:21:32,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 264 transitions, 3587 flow [2024-06-21 18:21:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 18:21:32,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:21:32,640 INFO L175 Difference]: Start difference. First operand has 270 places, 253 transitions, 3039 flow. Second operand 10 states and 135 transitions. [2024-06-21 18:21:32,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 264 transitions, 3587 flow [2024-06-21 18:21:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 264 transitions, 3460 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 18:21:32,897 INFO L231 Difference]: Finished difference. Result has 275 places, 253 transitions, 3059 flow [2024-06-21 18:21:32,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3059, PETRI_PLACES=275, PETRI_TRANSITIONS=253} [2024-06-21 18:21:32,898 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 18:21:32,898 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 253 transitions, 3059 flow [2024-06-21 18:21:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:32,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:32,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:21:32,898 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1672167607, now seen corresponding path program 8 times [2024-06-21 18:21:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312317601] [2024-06-21 18:21:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:35,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312317601] [2024-06-21 18:21:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312317601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:35,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:35,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:35,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468187032] [2024-06-21 18:21:35,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:35,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:35,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:35,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 253 transitions, 3059 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:35,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:35,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:35,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:35,735 INFO L124 PetriNetUnfolderBase]: 481/902 cut-off events. [2024-06-21 18:21:35,735 INFO L125 PetriNetUnfolderBase]: For 122612/122612 co-relation queries the response was YES. [2024-06-21 18:21:35,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8023 conditions, 902 events. 481/902 cut-off events. For 122612/122612 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4741 event pairs, 26 based on Foata normal form. 2/903 useless extension candidates. Maximal degree in co-relation 7893. Up to 683 conditions per place. [2024-06-21 18:21:35,744 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 197 selfloop transitions, 69 changer transitions 0/269 dead transitions. [2024-06-21 18:21:35,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 269 transitions, 3902 flow [2024-06-21 18:21:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 18:21:35,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 18:21:35,745 INFO L175 Difference]: Start difference. First operand has 275 places, 253 transitions, 3059 flow. Second operand 10 states and 137 transitions. [2024-06-21 18:21:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 269 transitions, 3902 flow [2024-06-21 18:21:36,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 269 transitions, 3753 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:36,060 INFO L231 Difference]: Finished difference. Result has 277 places, 257 transitions, 3159 flow [2024-06-21 18:21:36,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3159, PETRI_PLACES=277, PETRI_TRANSITIONS=257} [2024-06-21 18:21:36,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 18:21:36,061 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 257 transitions, 3159 flow [2024-06-21 18:21:36,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:36,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:36,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:36,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:21:36,061 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:36,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1672161097, now seen corresponding path program 9 times [2024-06-21 18:21:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:36,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888677710] [2024-06-21 18:21:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888677710] [2024-06-21 18:21:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888677710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:37,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403203086] [2024-06-21 18:21:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:38,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:38,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 257 transitions, 3159 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:38,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:38,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:38,645 INFO L124 PetriNetUnfolderBase]: 479/899 cut-off events. [2024-06-21 18:21:38,646 INFO L125 PetriNetUnfolderBase]: For 115782/115782 co-relation queries the response was YES. [2024-06-21 18:21:38,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 899 events. 479/899 cut-off events. For 115782/115782 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4722 event pairs, 36 based on Foata normal form. 1/899 useless extension candidates. Maximal degree in co-relation 7787. Up to 682 conditions per place. [2024-06-21 18:21:38,655 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 68 changer transitions 0/269 dead transitions. [2024-06-21 18:21:38,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 269 transitions, 3903 flow [2024-06-21 18:21:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:21:38,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 18:21:38,655 INFO L175 Difference]: Start difference. First operand has 277 places, 257 transitions, 3159 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:21:38,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 269 transitions, 3903 flow [2024-06-21 18:21:38,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 269 transitions, 3541 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-21 18:21:38,955 INFO L231 Difference]: Finished difference. Result has 277 places, 257 transitions, 2939 flow [2024-06-21 18:21:38,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2939, PETRI_PLACES=277, PETRI_TRANSITIONS=257} [2024-06-21 18:21:38,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 18:21:38,955 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 257 transitions, 2939 flow [2024-06-21 18:21:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:38,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:38,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:38,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:21:38,956 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:38,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1249699151, now seen corresponding path program 5 times [2024-06-21 18:21:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:38,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629905724] [2024-06-21 18:21:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:38,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:40,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629905724] [2024-06-21 18:21:40,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629905724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:40,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:40,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:21:40,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442163309] [2024-06-21 18:21:40,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:40,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:21:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:40,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:21:40,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:21:40,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:21:40,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 257 transitions, 2939 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:21:40,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:40,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:21:40,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:40,799 INFO L124 PetriNetUnfolderBase]: 483/907 cut-off events. [2024-06-21 18:21:40,799 INFO L125 PetriNetUnfolderBase]: For 122403/122403 co-relation queries the response was YES. [2024-06-21 18:21:40,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7768 conditions, 907 events. 483/907 cut-off events. For 122403/122403 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4785 event pairs, 47 based on Foata normal form. 2/908 useless extension candidates. Maximal degree in co-relation 7637. Up to 723 conditions per place. [2024-06-21 18:21:40,807 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 209 selfloop transitions, 55 changer transitions 0/267 dead transitions. [2024-06-21 18:21:40,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 267 transitions, 3515 flow [2024-06-21 18:21:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 18:21:40,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 18:21:40,808 INFO L175 Difference]: Start difference. First operand has 277 places, 257 transitions, 2939 flow. Second operand 10 states and 121 transitions. [2024-06-21 18:21:40,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 267 transitions, 3515 flow [2024-06-21 18:21:41,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 267 transitions, 3381 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:21:41,121 INFO L231 Difference]: Finished difference. Result has 280 places, 258 transitions, 2949 flow [2024-06-21 18:21:41,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2949, PETRI_PLACES=280, PETRI_TRANSITIONS=258} [2024-06-21 18:21:41,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 18:21:41,121 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 258 transitions, 2949 flow [2024-06-21 18:21:41,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:21:41,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:41,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:41,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:21:41,122 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:41,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash -887411783, now seen corresponding path program 10 times [2024-06-21 18:21:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927027621] [2024-06-21 18:21:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:43,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927027621] [2024-06-21 18:21:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927027621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:43,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840032029] [2024-06-21 18:21:43,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:43,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:43,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:43,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 258 transitions, 2949 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:43,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:43,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:43,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:44,382 INFO L124 PetriNetUnfolderBase]: 516/971 cut-off events. [2024-06-21 18:21:44,382 INFO L125 PetriNetUnfolderBase]: For 147899/147899 co-relation queries the response was YES. [2024-06-21 18:21:44,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8869 conditions, 971 events. 516/971 cut-off events. For 147899/147899 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5217 event pairs, 46 based on Foata normal form. 1/971 useless extension candidates. Maximal degree in co-relation 8737. Up to 697 conditions per place. [2024-06-21 18:21:44,391 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 208 selfloop transitions, 71 changer transitions 0/282 dead transitions. [2024-06-21 18:21:44,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 282 transitions, 4367 flow [2024-06-21 18:21:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:21:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:21:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 18:21:44,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2024-06-21 18:21:44,392 INFO L175 Difference]: Start difference. First operand has 280 places, 258 transitions, 2949 flow. Second operand 9 states and 136 transitions. [2024-06-21 18:21:44,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 282 transitions, 4367 flow [2024-06-21 18:21:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 282 transitions, 4233 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:44,780 INFO L231 Difference]: Finished difference. Result has 283 places, 269 transitions, 3233 flow [2024-06-21 18:21:44,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3233, PETRI_PLACES=283, PETRI_TRANSITIONS=269} [2024-06-21 18:21:44,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-21 18:21:44,780 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 269 transitions, 3233 flow [2024-06-21 18:21:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:44,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:44,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:44,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:21:44,781 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:44,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1525584487, now seen corresponding path program 2 times [2024-06-21 18:21:44,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:44,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784391263] [2024-06-21 18:21:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784391263] [2024-06-21 18:21:47,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784391263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:47,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:47,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:21:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723848981] [2024-06-21 18:21:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:47,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:21:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:21:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:21:47,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:47,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 269 transitions, 3233 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:47,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:47,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:47,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:47,955 INFO L124 PetriNetUnfolderBase]: 520/977 cut-off events. [2024-06-21 18:21:47,956 INFO L125 PetriNetUnfolderBase]: For 157524/157524 co-relation queries the response was YES. [2024-06-21 18:21:47,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 977 events. 520/977 cut-off events. For 157524/157524 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5258 event pairs, 33 based on Foata normal form. 2/978 useless extension candidates. Maximal degree in co-relation 8931. Up to 834 conditions per place. [2024-06-21 18:21:47,966 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 243 selfloop transitions, 34 changer transitions 0/280 dead transitions. [2024-06-21 18:21:47,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 280 transitions, 3837 flow [2024-06-21 18:21:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 18:21:47,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 18:21:47,967 INFO L175 Difference]: Start difference. First operand has 283 places, 269 transitions, 3233 flow. Second operand 10 states and 129 transitions. [2024-06-21 18:21:47,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 280 transitions, 3837 flow [2024-06-21 18:21:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 280 transitions, 3691 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 18:21:48,395 INFO L231 Difference]: Finished difference. Result has 290 places, 270 transitions, 3189 flow [2024-06-21 18:21:48,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3189, PETRI_PLACES=290, PETRI_TRANSITIONS=270} [2024-06-21 18:21:48,396 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 18:21:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 270 transitions, 3189 flow [2024-06-21 18:21:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:21:48,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:48,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:21:48,396 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:48,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1525593415, now seen corresponding path program 11 times [2024-06-21 18:21:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:48,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628385596] [2024-06-21 18:21:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:50,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:50,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628385596] [2024-06-21 18:21:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628385596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:50,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:50,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741517466] [2024-06-21 18:21:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:50,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:50,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:50,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 270 transitions, 3189 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:50,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:50,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:51,016 INFO L124 PetriNetUnfolderBase]: 541/1018 cut-off events. [2024-06-21 18:21:51,017 INFO L125 PetriNetUnfolderBase]: For 173218/173218 co-relation queries the response was YES. [2024-06-21 18:21:51,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9695 conditions, 1018 events. 541/1018 cut-off events. For 173218/173218 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5550 event pairs, 41 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 9558. Up to 437 conditions per place. [2024-06-21 18:21:51,028 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 137 changer transitions 0/296 dead transitions. [2024-06-21 18:21:51,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 296 transitions, 4909 flow [2024-06-21 18:21:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 18:21:51,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806451612903226 [2024-06-21 18:21:51,029 INFO L175 Difference]: Start difference. First operand has 290 places, 270 transitions, 3189 flow. Second operand 10 states and 149 transitions. [2024-06-21 18:21:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 296 transitions, 4909 flow [2024-06-21 18:21:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 296 transitions, 4817 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:21:51,482 INFO L231 Difference]: Finished difference. Result has 292 places, 279 transitions, 3585 flow [2024-06-21 18:21:51,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3585, PETRI_PLACES=292, PETRI_TRANSITIONS=279} [2024-06-21 18:21:51,483 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-21 18:21:51,483 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 279 transitions, 3585 flow [2024-06-21 18:21:51,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:51,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:51,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:51,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:21:51,483 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:51,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1525824055, now seen corresponding path program 12 times [2024-06-21 18:21:51,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:51,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988292812] [2024-06-21 18:21:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:51,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988292812] [2024-06-21 18:21:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988292812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:53,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:53,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100950650] [2024-06-21 18:21:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:53,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:53,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:53,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 279 transitions, 3585 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:53,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:53,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:53,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:54,190 INFO L124 PetriNetUnfolderBase]: 547/1028 cut-off events. [2024-06-21 18:21:54,190 INFO L125 PetriNetUnfolderBase]: For 177683/177683 co-relation queries the response was YES. [2024-06-21 18:21:54,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10091 conditions, 1028 events. 547/1028 cut-off events. For 177683/177683 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5595 event pairs, 39 based on Foata normal form. 2/1029 useless extension candidates. Maximal degree in co-relation 9953. Up to 443 conditions per place. [2024-06-21 18:21:54,202 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 142 changer transitions 0/297 dead transitions. [2024-06-21 18:21:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 297 transitions, 4971 flow [2024-06-21 18:21:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:21:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:21:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 18:21:54,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-21 18:21:54,205 INFO L175 Difference]: Start difference. First operand has 292 places, 279 transitions, 3585 flow. Second operand 10 states and 146 transitions. [2024-06-21 18:21:54,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 297 transitions, 4971 flow [2024-06-21 18:21:54,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 297 transitions, 4578 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 18:21:54,693 INFO L231 Difference]: Finished difference. Result has 296 places, 282 transitions, 3566 flow [2024-06-21 18:21:54,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3566, PETRI_PLACES=296, PETRI_TRANSITIONS=282} [2024-06-21 18:21:54,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 18:21:54,694 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 282 transitions, 3566 flow [2024-06-21 18:21:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:54,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:54,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:21:54,694 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:54,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1525830565, now seen corresponding path program 13 times [2024-06-21 18:21:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:54,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608510499] [2024-06-21 18:21:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:21:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:21:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:21:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608510499] [2024-06-21 18:21:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608510499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:21:57,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:21:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:21:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978905264] [2024-06-21 18:21:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:21:57,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:21:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:21:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:21:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:21:57,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:21:57,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 282 transitions, 3566 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:57,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:21:57,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:21:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:21:58,680 INFO L124 PetriNetUnfolderBase]: 550/1036 cut-off events. [2024-06-21 18:21:58,680 INFO L125 PetriNetUnfolderBase]: For 173153/173153 co-relation queries the response was YES. [2024-06-21 18:21:58,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9965 conditions, 1036 events. 550/1036 cut-off events. For 173153/173153 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5677 event pairs, 48 based on Foata normal form. 1/1036 useless extension candidates. Maximal degree in co-relation 9827. Up to 448 conditions per place. [2024-06-21 18:21:58,692 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 148 selfloop transitions, 150 changer transitions 0/301 dead transitions. [2024-06-21 18:21:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 301 transitions, 4988 flow [2024-06-21 18:21:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:21:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:21:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 18:21:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910394265232975 [2024-06-21 18:21:58,693 INFO L175 Difference]: Start difference. First operand has 296 places, 282 transitions, 3566 flow. Second operand 9 states and 137 transitions. [2024-06-21 18:21:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 301 transitions, 4988 flow [2024-06-21 18:21:59,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 301 transitions, 4659 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 18:21:59,234 INFO L231 Difference]: Finished difference. Result has 299 places, 287 transitions, 3698 flow [2024-06-21 18:21:59,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3698, PETRI_PLACES=299, PETRI_TRANSITIONS=287} [2024-06-21 18:21:59,234 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 18:21:59,234 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 287 transitions, 3698 flow [2024-06-21 18:21:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:21:59,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:21:59,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:21:59,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:21:59,235 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:21:59,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:21:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash -893661383, now seen corresponding path program 14 times [2024-06-21 18:21:59,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:21:59,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477923070] [2024-06-21 18:21:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:21:59,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:21:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:01,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477923070] [2024-06-21 18:22:01,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477923070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:01,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:01,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331322620] [2024-06-21 18:22:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:01,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:01,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 287 transitions, 3698 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:01,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:01,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:01,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:02,060 INFO L124 PetriNetUnfolderBase]: 557/1050 cut-off events. [2024-06-21 18:22:02,060 INFO L125 PetriNetUnfolderBase]: For 182710/182710 co-relation queries the response was YES. [2024-06-21 18:22:02,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10165 conditions, 1050 events. 557/1050 cut-off events. For 182710/182710 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5775 event pairs, 49 based on Foata normal form. 2/1051 useless extension candidates. Maximal degree in co-relation 10026. Up to 812 conditions per place. [2024-06-21 18:22:02,071 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 235 selfloop transitions, 63 changer transitions 0/301 dead transitions. [2024-06-21 18:22:02,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 301 transitions, 4638 flow [2024-06-21 18:22:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 18:22:02,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-21 18:22:02,072 INFO L175 Difference]: Start difference. First operand has 299 places, 287 transitions, 3698 flow. Second operand 10 states and 136 transitions. [2024-06-21 18:22:02,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 301 transitions, 4638 flow [2024-06-21 18:22:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 4313 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 18:22:02,626 INFO L231 Difference]: Finished difference. Result has 304 places, 290 transitions, 3590 flow [2024-06-21 18:22:02,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3590, PETRI_PLACES=304, PETRI_TRANSITIONS=290} [2024-06-21 18:22:02,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-21 18:22:02,626 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 290 transitions, 3590 flow [2024-06-21 18:22:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:02,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:02,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:22:02,627 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:02,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1517549597, now seen corresponding path program 6 times [2024-06-21 18:22:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116782159] [2024-06-21 18:22:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116782159] [2024-06-21 18:22:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116782159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:22:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023652275] [2024-06-21 18:22:04,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:04,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:22:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:22:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:22:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:05,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 290 transitions, 3590 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:05,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:05,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:05,532 INFO L124 PetriNetUnfolderBase]: 560/1055 cut-off events. [2024-06-21 18:22:05,532 INFO L125 PetriNetUnfolderBase]: For 184298/184298 co-relation queries the response was YES. [2024-06-21 18:22:05,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10010 conditions, 1055 events. 560/1055 cut-off events. For 184298/184298 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5791 event pairs, 59 based on Foata normal form. 1/1055 useless extension candidates. Maximal degree in co-relation 9869. Up to 946 conditions per place. [2024-06-21 18:22:05,544 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 18 changer transitions 0/301 dead transitions. [2024-06-21 18:22:05,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 301 transitions, 4241 flow [2024-06-21 18:22:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 18:22:05,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:22:05,545 INFO L175 Difference]: Start difference. First operand has 304 places, 290 transitions, 3590 flow. Second operand 10 states and 115 transitions. [2024-06-21 18:22:05,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 301 transitions, 4241 flow [2024-06-21 18:22:05,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 3982 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-21 18:22:05,989 INFO L231 Difference]: Finished difference. Result has 304 places, 292 transitions, 3411 flow [2024-06-21 18:22:05,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3411, PETRI_PLACES=304, PETRI_TRANSITIONS=292} [2024-06-21 18:22:05,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-21 18:22:05,989 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 292 transitions, 3411 flow [2024-06-21 18:22:05,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:05,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:05,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:05,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:22:05,990 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:05,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash -887405025, now seen corresponding path program 7 times [2024-06-21 18:22:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:05,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512171886] [2024-06-21 18:22:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512171886] [2024-06-21 18:22:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512171886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:22:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389113600] [2024-06-21 18:22:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:22:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:22:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:22:08,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:22:08,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 292 transitions, 3411 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:08,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:08,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:22:08,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:08,456 INFO L124 PetriNetUnfolderBase]: 563/1060 cut-off events. [2024-06-21 18:22:08,456 INFO L125 PetriNetUnfolderBase]: For 186629/186629 co-relation queries the response was YES. [2024-06-21 18:22:08,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9773 conditions, 1060 events. 563/1060 cut-off events. For 186629/186629 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5842 event pairs, 38 based on Foata normal form. 1/1060 useless extension candidates. Maximal degree in co-relation 9634. Up to 831 conditions per place. [2024-06-21 18:22:08,468 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 235 selfloop transitions, 64 changer transitions 0/303 dead transitions. [2024-06-21 18:22:08,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 303 transitions, 4068 flow [2024-06-21 18:22:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:22:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:22:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 18:22:08,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2024-06-21 18:22:08,470 INFO L175 Difference]: Start difference. First operand has 304 places, 292 transitions, 3411 flow. Second operand 9 states and 136 transitions. [2024-06-21 18:22:08,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 303 transitions, 4068 flow [2024-06-21 18:22:08,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 303 transitions, 4017 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:08,920 INFO L231 Difference]: Finished difference. Result has 305 places, 294 transitions, 3536 flow [2024-06-21 18:22:08,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3536, PETRI_PLACES=305, PETRI_TRANSITIONS=294} [2024-06-21 18:22:08,920 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 18:22:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 294 transitions, 3536 flow [2024-06-21 18:22:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:08,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:22:08,921 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:08,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1256139711, now seen corresponding path program 15 times [2024-06-21 18:22:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266499512] [2024-06-21 18:22:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266499512] [2024-06-21 18:22:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266499512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:10,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:10,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:10,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983114652] [2024-06-21 18:22:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:10,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:10,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 294 transitions, 3536 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:10,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:10,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:10,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:11,488 INFO L124 PetriNetUnfolderBase]: 566/1067 cut-off events. [2024-06-21 18:22:11,488 INFO L125 PetriNetUnfolderBase]: For 191151/191151 co-relation queries the response was YES. [2024-06-21 18:22:11,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9959 conditions, 1067 events. 566/1067 cut-off events. For 191151/191151 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5899 event pairs, 37 based on Foata normal form. 1/1067 useless extension candidates. Maximal degree in co-relation 9819. Up to 816 conditions per place. [2024-06-21 18:22:11,500 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 236 selfloop transitions, 72 changer transitions 0/311 dead transitions. [2024-06-21 18:22:11,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 311 transitions, 4726 flow [2024-06-21 18:22:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 18:22:11,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:22:11,503 INFO L175 Difference]: Start difference. First operand has 305 places, 294 transitions, 3536 flow. Second operand 10 states and 140 transitions. [2024-06-21 18:22:11,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 311 transitions, 4726 flow [2024-06-21 18:22:12,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 311 transitions, 4577 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:22:12,041 INFO L231 Difference]: Finished difference. Result has 309 places, 300 transitions, 3701 flow [2024-06-21 18:22:12,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3701, PETRI_PLACES=309, PETRI_TRANSITIONS=300} [2024-06-21 18:22:12,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 18:22:12,041 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 300 transitions, 3701 flow [2024-06-21 18:22:12,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:12,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:12,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:12,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:22:12,042 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -887174385, now seen corresponding path program 8 times [2024-06-21 18:22:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:12,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902813982] [2024-06-21 18:22:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:12,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:14,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902813982] [2024-06-21 18:22:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902813982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:14,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:22:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816234487] [2024-06-21 18:22:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:22:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:22:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:22:14,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:22:14,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 300 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:14,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:14,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:22:14,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:14,550 INFO L124 PetriNetUnfolderBase]: 569/1072 cut-off events. [2024-06-21 18:22:14,550 INFO L125 PetriNetUnfolderBase]: For 195807/195807 co-relation queries the response was YES. [2024-06-21 18:22:14,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10091 conditions, 1072 events. 569/1072 cut-off events. For 195807/195807 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5922 event pairs, 37 based on Foata normal form. 1/1072 useless extension candidates. Maximal degree in co-relation 9949. Up to 841 conditions per place. [2024-06-21 18:22:14,562 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 241 selfloop transitions, 66 changer transitions 0/311 dead transitions. [2024-06-21 18:22:14,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 311 transitions, 4378 flow [2024-06-21 18:22:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:22:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:22:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 18:22:14,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2024-06-21 18:22:14,564 INFO L175 Difference]: Start difference. First operand has 309 places, 300 transitions, 3701 flow. Second operand 9 states and 136 transitions. [2024-06-21 18:22:14,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 311 transitions, 4378 flow [2024-06-21 18:22:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 311 transitions, 4264 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:22:15,117 INFO L231 Difference]: Finished difference. Result has 313 places, 302 transitions, 3771 flow [2024-06-21 18:22:15,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3771, PETRI_PLACES=313, PETRI_TRANSITIONS=302} [2024-06-21 18:22:15,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 18:22:15,117 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 302 transitions, 3771 flow [2024-06-21 18:22:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:15,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:22:15,117 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -657486023, now seen corresponding path program 16 times [2024-06-21 18:22:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120509324] [2024-06-21 18:22:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:16,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:16,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120509324] [2024-06-21 18:22:16,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120509324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:16,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203497518] [2024-06-21 18:22:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:17,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:17,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 302 transitions, 3771 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:17,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:17,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:17,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:17,647 INFO L124 PetriNetUnfolderBase]: 566/1069 cut-off events. [2024-06-21 18:22:17,648 INFO L125 PetriNetUnfolderBase]: For 191677/191677 co-relation queries the response was YES. [2024-06-21 18:22:17,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9952 conditions, 1069 events. 566/1069 cut-off events. For 191677/191677 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5924 event pairs, 67 based on Foata normal form. 2/1070 useless extension candidates. Maximal degree in co-relation 9808. Up to 929 conditions per place. [2024-06-21 18:22:17,660 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 281 selfloop transitions, 28 changer transitions 0/312 dead transitions. [2024-06-21 18:22:17,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 312 transitions, 4619 flow [2024-06-21 18:22:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:22:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:22:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 18:22:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 18:22:17,661 INFO L175 Difference]: Start difference. First operand has 313 places, 302 transitions, 3771 flow. Second operand 11 states and 128 transitions. [2024-06-21 18:22:17,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 312 transitions, 4619 flow [2024-06-21 18:22:18,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 312 transitions, 4416 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 18:22:18,255 INFO L231 Difference]: Finished difference. Result has 317 places, 302 transitions, 3632 flow [2024-06-21 18:22:18,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3632, PETRI_PLACES=317, PETRI_TRANSITIONS=302} [2024-06-21 18:22:18,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-21 18:22:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 302 transitions, 3632 flow [2024-06-21 18:22:18,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:18,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:22:18,256 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -893661135, now seen corresponding path program 9 times [2024-06-21 18:22:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584917275] [2024-06-21 18:22:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584917275] [2024-06-21 18:22:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584917275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:20,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:22:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110459152] [2024-06-21 18:22:20,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:22:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:22:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:22:20,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:20,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 302 transitions, 3632 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:20,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:20,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:20,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:20,637 INFO L124 PetriNetUnfolderBase]: 566/1068 cut-off events. [2024-06-21 18:22:20,637 INFO L125 PetriNetUnfolderBase]: For 192246/192246 co-relation queries the response was YES. [2024-06-21 18:22:20,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9727 conditions, 1068 events. 566/1068 cut-off events. For 192246/192246 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5908 event pairs, 36 based on Foata normal form. 2/1069 useless extension candidates. Maximal degree in co-relation 9581. Up to 849 conditions per place. [2024-06-21 18:22:20,649 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 249 selfloop transitions, 61 changer transitions 0/313 dead transitions. [2024-06-21 18:22:20,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 313 transitions, 4308 flow [2024-06-21 18:22:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 18:22:20,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 18:22:20,650 INFO L175 Difference]: Start difference. First operand has 317 places, 302 transitions, 3632 flow. Second operand 10 states and 134 transitions. [2024-06-21 18:22:20,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 313 transitions, 4308 flow [2024-06-21 18:22:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 313 transitions, 4207 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 18:22:21,208 INFO L231 Difference]: Finished difference. Result has 316 places, 304 transitions, 3701 flow [2024-06-21 18:22:21,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3701, PETRI_PLACES=316, PETRI_TRANSITIONS=304} [2024-06-21 18:22:21,208 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 18:22:21,208 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 304 transitions, 3701 flow [2024-06-21 18:22:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:21,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:21,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:22:21,208 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:21,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1249877091, now seen corresponding path program 17 times [2024-06-21 18:22:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:21,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261278438] [2024-06-21 18:22:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:21,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:23,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261278438] [2024-06-21 18:22:23,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261278438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:23,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:23,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:23,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702658229] [2024-06-21 18:22:23,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:23,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:23,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:23,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 304 transitions, 3701 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:23,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:24,482 INFO L124 PetriNetUnfolderBase]: 564/1065 cut-off events. [2024-06-21 18:22:24,483 INFO L125 PetriNetUnfolderBase]: For 182504/182504 co-relation queries the response was YES. [2024-06-21 18:22:24,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 1065 events. 564/1065 cut-off events. For 182504/182504 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5903 event pairs, 46 based on Foata normal form. 1/1065 useless extension candidates. Maximal degree in co-relation 9512. Up to 843 conditions per place. [2024-06-21 18:22:24,494 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 249 selfloop transitions, 61 changer transitions 0/313 dead transitions. [2024-06-21 18:22:24,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 313 transitions, 4341 flow [2024-06-21 18:22:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 18:22:24,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 18:22:24,496 INFO L175 Difference]: Start difference. First operand has 316 places, 304 transitions, 3701 flow. Second operand 10 states and 134 transitions. [2024-06-21 18:22:24,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 313 transitions, 4341 flow [2024-06-21 18:22:25,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 313 transitions, 4141 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:25,051 INFO L231 Difference]: Finished difference. Result has 318 places, 304 transitions, 3628 flow [2024-06-21 18:22:25,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3628, PETRI_PLACES=318, PETRI_TRANSITIONS=304} [2024-06-21 18:22:25,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-21 18:22:25,052 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 304 transitions, 3628 flow [2024-06-21 18:22:25,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:25,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:25,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:25,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:22:25,052 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:25,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash -887165705, now seen corresponding path program 3 times [2024-06-21 18:22:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816919213] [2024-06-21 18:22:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:27,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816919213] [2024-06-21 18:22:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816919213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:27,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135267894] [2024-06-21 18:22:27,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:28,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:28,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 304 transitions, 3628 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:28,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:28,587 INFO L124 PetriNetUnfolderBase]: 568/1072 cut-off events. [2024-06-21 18:22:28,587 INFO L125 PetriNetUnfolderBase]: For 193939/193939 co-relation queries the response was YES. [2024-06-21 18:22:28,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9686 conditions, 1072 events. 568/1072 cut-off events. For 193939/193939 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5958 event pairs, 32 based on Foata normal form. 2/1073 useless extension candidates. Maximal degree in co-relation 9538. Up to 942 conditions per place. [2024-06-21 18:22:28,600 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 289 selfloop transitions, 23 changer transitions 0/315 dead transitions. [2024-06-21 18:22:28,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 315 transitions, 4304 flow [2024-06-21 18:22:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 18:22:28,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 18:22:28,601 INFO L175 Difference]: Start difference. First operand has 318 places, 304 transitions, 3628 flow. Second operand 10 states and 126 transitions. [2024-06-21 18:22:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 315 transitions, 4304 flow [2024-06-21 18:22:29,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 315 transitions, 4164 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:29,099 INFO L231 Difference]: Finished difference. Result has 320 places, 305 transitions, 3570 flow [2024-06-21 18:22:29,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3570, PETRI_PLACES=320, PETRI_TRANSITIONS=305} [2024-06-21 18:22:29,100 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 18:22:29,100 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 305 transitions, 3570 flow [2024-06-21 18:22:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:29,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:29,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:22:29,100 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:29,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -657477405, now seen corresponding path program 10 times [2024-06-21 18:22:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:29,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107107613] [2024-06-21 18:22:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:31,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107107613] [2024-06-21 18:22:31,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107107613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:31,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:31,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298861136] [2024-06-21 18:22:31,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:32,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:32,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 305 transitions, 3570 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:32,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:32,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:32,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:32,747 INFO L124 PetriNetUnfolderBase]: 571/1078 cut-off events. [2024-06-21 18:22:32,747 INFO L125 PetriNetUnfolderBase]: For 190401/190401 co-relation queries the response was YES. [2024-06-21 18:22:32,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9679 conditions, 1078 events. 571/1078 cut-off events. For 190401/190401 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5971 event pairs, 58 based on Foata normal form. 1/1078 useless extension candidates. Maximal degree in co-relation 9530. Up to 961 conditions per place. [2024-06-21 18:22:32,758 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 292 selfloop transitions, 21 changer transitions 0/316 dead transitions. [2024-06-21 18:22:32,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 316 transitions, 4254 flow [2024-06-21 18:22:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:22:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:22:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 18:22:32,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 18:22:32,759 INFO L175 Difference]: Start difference. First operand has 320 places, 305 transitions, 3570 flow. Second operand 11 states and 124 transitions. [2024-06-21 18:22:32,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 316 transitions, 4254 flow [2024-06-21 18:22:33,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 316 transitions, 4182 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:33,273 INFO L231 Difference]: Finished difference. Result has 323 places, 307 transitions, 3587 flow [2024-06-21 18:22:33,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3587, PETRI_PLACES=323, PETRI_TRANSITIONS=307} [2024-06-21 18:22:33,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2024-06-21 18:22:33,274 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 307 transitions, 3587 flow [2024-06-21 18:22:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:33,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:33,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:33,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:22:33,274 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:33,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1240484617, now seen corresponding path program 4 times [2024-06-21 18:22:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:33,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643909455] [2024-06-21 18:22:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643909455] [2024-06-21 18:22:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643909455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:37,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:37,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:22:37,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947159346] [2024-06-21 18:22:37,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:37,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:22:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:22:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:22:37,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:37,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 307 transitions, 3587 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:37,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:37,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:37,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:37,914 INFO L124 PetriNetUnfolderBase]: 575/1086 cut-off events. [2024-06-21 18:22:37,915 INFO L125 PetriNetUnfolderBase]: For 200859/200859 co-relation queries the response was YES. [2024-06-21 18:22:37,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9735 conditions, 1086 events. 575/1086 cut-off events. For 200859/200859 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6046 event pairs, 57 based on Foata normal form. 2/1087 useless extension candidates. Maximal degree in co-relation 9585. Up to 972 conditions per place. [2024-06-21 18:22:37,925 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 298 selfloop transitions, 17 changer transitions 0/318 dead transitions. [2024-06-21 18:22:37,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 318 transitions, 4271 flow [2024-06-21 18:22:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 18:22:37,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:22:37,926 INFO L175 Difference]: Start difference. First operand has 323 places, 307 transitions, 3587 flow. Second operand 10 states and 115 transitions. [2024-06-21 18:22:37,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 318 transitions, 4271 flow [2024-06-21 18:22:38,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 318 transitions, 4212 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 18:22:38,493 INFO L231 Difference]: Finished difference. Result has 324 places, 308 transitions, 3600 flow [2024-06-21 18:22:38,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3600, PETRI_PLACES=324, PETRI_TRANSITIONS=308} [2024-06-21 18:22:38,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-21 18:22:38,494 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 308 transitions, 3600 flow [2024-06-21 18:22:38,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:38,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:38,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:38,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:22:38,494 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:38,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash -887166015, now seen corresponding path program 11 times [2024-06-21 18:22:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191932154] [2024-06-21 18:22:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:40,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:40,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191932154] [2024-06-21 18:22:40,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191932154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:40,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:40,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:40,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663451764] [2024-06-21 18:22:40,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:40,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:40,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 308 transitions, 3600 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:40,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:40,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:41,398 INFO L124 PetriNetUnfolderBase]: 573/1083 cut-off events. [2024-06-21 18:22:41,398 INFO L125 PetriNetUnfolderBase]: For 192281/192281 co-relation queries the response was YES. [2024-06-21 18:22:41,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9615 conditions, 1083 events. 573/1083 cut-off events. For 192281/192281 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6008 event pairs, 36 based on Foata normal form. 1/1083 useless extension candidates. Maximal degree in co-relation 9464. Up to 864 conditions per place. [2024-06-21 18:22:41,410 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 250 selfloop transitions, 64 changer transitions 0/317 dead transitions. [2024-06-21 18:22:41,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 317 transitions, 4248 flow [2024-06-21 18:22:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 18:22:41,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 18:22:41,411 INFO L175 Difference]: Start difference. First operand has 324 places, 308 transitions, 3600 flow. Second operand 10 states and 134 transitions. [2024-06-21 18:22:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 317 transitions, 4248 flow [2024-06-21 18:22:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 317 transitions, 4180 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:42,026 INFO L231 Difference]: Finished difference. Result has 326 places, 308 transitions, 3665 flow [2024-06-21 18:22:42,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3665, PETRI_PLACES=326, PETRI_TRANSITIONS=308} [2024-06-21 18:22:42,026 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-21 18:22:42,026 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 308 transitions, 3665 flow [2024-06-21 18:22:42,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:42,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:42,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:22:42,027 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:42,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1230365597, now seen corresponding path program 12 times [2024-06-21 18:22:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109183801] [2024-06-21 18:22:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:45,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109183801] [2024-06-21 18:22:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109183801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:45,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:45,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:22:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914878561] [2024-06-21 18:22:45,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:45,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:22:45,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:22:45,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:22:45,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:45,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 308 transitions, 3665 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:45,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:45,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:45,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:45,912 INFO L124 PetriNetUnfolderBase]: 570/1077 cut-off events. [2024-06-21 18:22:45,912 INFO L125 PetriNetUnfolderBase]: For 189259/189259 co-relation queries the response was YES. [2024-06-21 18:22:45,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9538 conditions, 1077 events. 570/1077 cut-off events. For 189259/189259 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6001 event pairs, 57 based on Foata normal form. 1/1077 useless extension candidates. Maximal degree in co-relation 9386. Up to 952 conditions per place. [2024-06-21 18:22:45,924 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 289 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-21 18:22:45,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 318 transitions, 4317 flow [2024-06-21 18:22:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:22:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:22:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 18:22:45,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 18:22:45,926 INFO L175 Difference]: Start difference. First operand has 326 places, 308 transitions, 3665 flow. Second operand 11 states and 128 transitions. [2024-06-21 18:22:45,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 318 transitions, 4317 flow [2024-06-21 18:22:46,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 318 transitions, 4105 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:22:46,527 INFO L231 Difference]: Finished difference. Result has 329 places, 308 transitions, 3510 flow [2024-06-21 18:22:46,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3510, PETRI_PLACES=329, PETRI_TRANSITIONS=308} [2024-06-21 18:22:46,527 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2024-06-21 18:22:46,527 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 308 transitions, 3510 flow [2024-06-21 18:22:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:22:46,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:46,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:46,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:22:46,528 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:46,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash 913179697, now seen corresponding path program 5 times [2024-06-21 18:22:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:46,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965251162] [2024-06-21 18:22:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:50,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965251162] [2024-06-21 18:22:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965251162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:50,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:50,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735474008] [2024-06-21 18:22:50,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:50,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:50,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 308 transitions, 3510 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:50,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:50,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:50,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:50,877 INFO L124 PetriNetUnfolderBase]: 574/1085 cut-off events. [2024-06-21 18:22:50,877 INFO L125 PetriNetUnfolderBase]: For 198766/198766 co-relation queries the response was YES. [2024-06-21 18:22:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1085 events. 574/1085 cut-off events. For 198766/198766 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6039 event pairs, 59 based on Foata normal form. 2/1086 useless extension candidates. Maximal degree in co-relation 9361. Up to 966 conditions per place. [2024-06-21 18:22:50,888 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 296 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-21 18:22:50,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 320 transitions, 4202 flow [2024-06-21 18:22:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:22:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:22:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 18:22:50,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 18:22:50,889 INFO L175 Difference]: Start difference. First operand has 329 places, 308 transitions, 3510 flow. Second operand 12 states and 133 transitions. [2024-06-21 18:22:50,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 320 transitions, 4202 flow [2024-06-21 18:22:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 320 transitions, 4111 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 18:22:51,522 INFO L231 Difference]: Finished difference. Result has 330 places, 309 transitions, 3501 flow [2024-06-21 18:22:51,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3501, PETRI_PLACES=330, PETRI_TRANSITIONS=309} [2024-06-21 18:22:51,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2024-06-21 18:22:51,523 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 309 transitions, 3501 flow [2024-06-21 18:22:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:51,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:51,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:22:51,523 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1230009097, now seen corresponding path program 6 times [2024-06-21 18:22:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547497768] [2024-06-21 18:22:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:54,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:54,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547497768] [2024-06-21 18:22:54,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547497768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:54,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:54,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361992870] [2024-06-21 18:22:54,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:54,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:54,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:54,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:54,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 309 transitions, 3501 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:54,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:54,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:54,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:54,828 INFO L124 PetriNetUnfolderBase]: 571/1080 cut-off events. [2024-06-21 18:22:54,828 INFO L125 PetriNetUnfolderBase]: For 189465/189465 co-relation queries the response was YES. [2024-06-21 18:22:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9250 conditions, 1080 events. 571/1080 cut-off events. For 189465/189465 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6020 event pairs, 56 based on Foata normal form. 2/1081 useless extension candidates. Maximal degree in co-relation 9096. Up to 941 conditions per place. [2024-06-21 18:22:54,841 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 295 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2024-06-21 18:22:54,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 321 transitions, 4163 flow [2024-06-21 18:22:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:22:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:22:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 18:22:54,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 18:22:54,842 INFO L175 Difference]: Start difference. First operand has 330 places, 309 transitions, 3501 flow. Second operand 12 states and 133 transitions. [2024-06-21 18:22:54,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 321 transitions, 4163 flow [2024-06-21 18:22:55,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 321 transitions, 4091 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 18:22:55,448 INFO L231 Difference]: Finished difference. Result has 332 places, 309 transitions, 3479 flow [2024-06-21 18:22:55,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3479, PETRI_PLACES=332, PETRI_TRANSITIONS=309} [2024-06-21 18:22:55,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-06-21 18:22:55,448 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 309 transitions, 3479 flow [2024-06-21 18:22:55,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:22:55,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:55,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:22:55,449 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:55,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash -887174633, now seen corresponding path program 18 times [2024-06-21 18:22:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:55,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158465797] [2024-06-21 18:22:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158465797] [2024-06-21 18:22:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158465797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:57,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:57,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:22:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973777556] [2024-06-21 18:22:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:57,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:22:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:22:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:22:57,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:22:57,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 309 transitions, 3479 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:57,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:57,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:22:57,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:22:58,126 INFO L124 PetriNetUnfolderBase]: 569/1077 cut-off events. [2024-06-21 18:22:58,127 INFO L125 PetriNetUnfolderBase]: For 179290/179290 co-relation queries the response was YES. [2024-06-21 18:22:58,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9085 conditions, 1077 events. 569/1077 cut-off events. For 179290/179290 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6004 event pairs, 37 based on Foata normal form. 1/1077 useless extension candidates. Maximal degree in co-relation 8930. Up to 829 conditions per place. [2024-06-21 18:22:58,139 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 240 selfloop transitions, 75 changer transitions 0/318 dead transitions. [2024-06-21 18:22:58,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 318 transitions, 4129 flow [2024-06-21 18:22:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:22:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:22:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 18:22:58,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-21 18:22:58,141 INFO L175 Difference]: Start difference. First operand has 332 places, 309 transitions, 3479 flow. Second operand 10 states and 136 transitions. [2024-06-21 18:22:58,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 318 transitions, 4129 flow [2024-06-21 18:22:58,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 318 transitions, 3971 flow, removed 35 selfloop flow, removed 12 redundant places. [2024-06-21 18:22:58,719 INFO L231 Difference]: Finished difference. Result has 330 places, 309 transitions, 3476 flow [2024-06-21 18:22:58,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3476, PETRI_PLACES=330, PETRI_TRANSITIONS=309} [2024-06-21 18:22:58,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2024-06-21 18:22:58,720 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 309 transitions, 3476 flow [2024-06-21 18:22:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2024-06-21 18:22:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:22:58,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:22:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:22:58,720 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:22:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:22:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 698882417, now seen corresponding path program 6 times [2024-06-21 18:22:58,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:22:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20273626] [2024-06-21 18:22:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:22:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:22:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:22:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:22:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:22:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20273626] [2024-06-21 18:22:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20273626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:22:59,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:22:59,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:22:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054444219] [2024-06-21 18:22:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:22:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:22:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:22:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:22:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:22:59,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:22:59,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 309 transitions, 3476 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:22:59,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:22:59,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:22:59,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:00,084 INFO L124 PetriNetUnfolderBase]: 578/1098 cut-off events. [2024-06-21 18:23:00,084 INFO L125 PetriNetUnfolderBase]: For 188845/188845 co-relation queries the response was YES. [2024-06-21 18:23:00,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9188 conditions, 1098 events. 578/1098 cut-off events. For 188845/188845 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6180 event pairs, 30 based on Foata normal form. 2/1099 useless extension candidates. Maximal degree in co-relation 9033. Up to 938 conditions per place. [2024-06-21 18:23:00,097 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 298 selfloop transitions, 29 changer transitions 0/330 dead transitions. [2024-06-21 18:23:00,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 330 transitions, 4216 flow [2024-06-21 18:23:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:23:00,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:23:00,098 INFO L175 Difference]: Start difference. First operand has 330 places, 309 transitions, 3476 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:23:00,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 330 transitions, 4216 flow [2024-06-21 18:23:00,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 330 transitions, 4046 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:23:00,620 INFO L231 Difference]: Finished difference. Result has 331 places, 311 transitions, 3410 flow [2024-06-21 18:23:00,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3410, PETRI_PLACES=331, PETRI_TRANSITIONS=311} [2024-06-21 18:23:00,621 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-21 18:23:00,621 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 311 transitions, 3410 flow [2024-06-21 18:23:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:00,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:00,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:00,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:23:00,621 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:00,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:00,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1526982461, now seen corresponding path program 7 times [2024-06-21 18:23:00,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:00,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976347117] [2024-06-21 18:23:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976347117] [2024-06-21 18:23:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976347117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504360671] [2024-06-21 18:23:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:01,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:01,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 311 transitions, 3410 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:01,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:01,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:02,106 INFO L124 PetriNetUnfolderBase]: 582/1106 cut-off events. [2024-06-21 18:23:02,106 INFO L125 PetriNetUnfolderBase]: For 192225/192225 co-relation queries the response was YES. [2024-06-21 18:23:02,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9159 conditions, 1106 events. 582/1106 cut-off events. For 192225/192225 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6255 event pairs, 36 based on Foata normal form. 2/1107 useless extension candidates. Maximal degree in co-relation 9004. Up to 955 conditions per place. [2024-06-21 18:23:02,117 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 296 selfloop transitions, 30 changer transitions 0/329 dead transitions. [2024-06-21 18:23:02,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 329 transitions, 4136 flow [2024-06-21 18:23:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:23:02,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:23:02,118 INFO L175 Difference]: Start difference. First operand has 331 places, 311 transitions, 3410 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:23:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 329 transitions, 4136 flow [2024-06-21 18:23:02,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 329 transitions, 4054 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:23:02,680 INFO L231 Difference]: Finished difference. Result has 334 places, 312 transitions, 3424 flow [2024-06-21 18:23:02,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3424, PETRI_PLACES=334, PETRI_TRANSITIONS=312} [2024-06-21 18:23:02,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-06-21 18:23:02,680 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 312 transitions, 3424 flow [2024-06-21 18:23:02,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:02,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:02,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:23:02,681 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:02,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 554286359, now seen corresponding path program 8 times [2024-06-21 18:23:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518598493] [2024-06-21 18:23:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:02,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:03,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:03,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518598493] [2024-06-21 18:23:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518598493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:03,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:03,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:23:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074174302] [2024-06-21 18:23:03,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:03,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:23:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:23:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:23:03,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:23:03,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 312 transitions, 3424 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:03,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:23:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:03,908 INFO L124 PetriNetUnfolderBase]: 560/1091 cut-off events. [2024-06-21 18:23:03,908 INFO L125 PetriNetUnfolderBase]: For 197720/197723 co-relation queries the response was YES. [2024-06-21 18:23:03,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 1091 events. 560/1091 cut-off events. For 197720/197723 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6347 event pairs, 16 based on Foata normal form. 4/1090 useless extension candidates. Maximal degree in co-relation 8697. Up to 637 conditions per place. [2024-06-21 18:23:03,921 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 182 selfloop transitions, 31 changer transitions 0/330 dead transitions. [2024-06-21 18:23:03,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 330 transitions, 3930 flow [2024-06-21 18:23:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:23:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:23:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 18:23:03,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:23:03,922 INFO L175 Difference]: Start difference. First operand has 334 places, 312 transitions, 3424 flow. Second operand 9 states and 126 transitions. [2024-06-21 18:23:03,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 330 transitions, 3930 flow [2024-06-21 18:23:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 330 transitions, 3844 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:04,618 INFO L231 Difference]: Finished difference. Result has 335 places, 314 transitions, 3451 flow [2024-06-21 18:23:04,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3451, PETRI_PLACES=335, PETRI_TRANSITIONS=314} [2024-06-21 18:23:04,619 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2024-06-21 18:23:04,619 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 314 transitions, 3451 flow [2024-06-21 18:23:04,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:04,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:04,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:23:04,619 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:04,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 504374069, now seen corresponding path program 9 times [2024-06-21 18:23:04,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:04,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833131264] [2024-06-21 18:23:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:04,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:05,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833131264] [2024-06-21 18:23:05,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833131264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:05,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466440461] [2024-06-21 18:23:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:05,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:05,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 314 transitions, 3451 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:05,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:05,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:05,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:06,229 INFO L124 PetriNetUnfolderBase]: 600/1144 cut-off events. [2024-06-21 18:23:06,230 INFO L125 PetriNetUnfolderBase]: For 199202/199202 co-relation queries the response was YES. [2024-06-21 18:23:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9386 conditions, 1144 events. 600/1144 cut-off events. For 199202/199202 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6570 event pairs, 41 based on Foata normal form. 2/1145 useless extension candidates. Maximal degree in co-relation 9229. Up to 984 conditions per place. [2024-06-21 18:23:06,242 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 304 selfloop transitions, 27 changer transitions 0/334 dead transitions. [2024-06-21 18:23:06,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 334 transitions, 4205 flow [2024-06-21 18:23:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:23:06,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:23:06,246 INFO L175 Difference]: Start difference. First operand has 335 places, 314 transitions, 3451 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:23:06,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 334 transitions, 4205 flow [2024-06-21 18:23:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 334 transitions, 4120 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:23:06,877 INFO L231 Difference]: Finished difference. Result has 340 places, 316 transitions, 3474 flow [2024-06-21 18:23:06,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3474, PETRI_PLACES=340, PETRI_TRANSITIONS=316} [2024-06-21 18:23:06,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2024-06-21 18:23:06,878 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 316 transitions, 3474 flow [2024-06-21 18:23:06,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:06,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:06,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:06,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:23:06,878 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:06,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 592671059, now seen corresponding path program 10 times [2024-06-21 18:23:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:06,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460030217] [2024-06-21 18:23:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460030217] [2024-06-21 18:23:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460030217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:08,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642031943] [2024-06-21 18:23:08,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:08,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:08,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:08,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:08,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 316 transitions, 3474 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:08,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:08,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:08,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:08,865 INFO L124 PetriNetUnfolderBase]: 604/1152 cut-off events. [2024-06-21 18:23:08,866 INFO L125 PetriNetUnfolderBase]: For 192730/192730 co-relation queries the response was YES. [2024-06-21 18:23:08,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9352 conditions, 1152 events. 604/1152 cut-off events. For 192730/192730 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6635 event pairs, 46 based on Foata normal form. 2/1153 useless extension candidates. Maximal degree in co-relation 9194. Up to 1001 conditions per place. [2024-06-21 18:23:08,879 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 302 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2024-06-21 18:23:08,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 333 transitions, 4208 flow [2024-06-21 18:23:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:23:08,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:23:08,880 INFO L175 Difference]: Start difference. First operand has 340 places, 316 transitions, 3474 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:23:08,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 333 transitions, 4208 flow [2024-06-21 18:23:09,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 333 transitions, 4128 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:23:09,460 INFO L231 Difference]: Finished difference. Result has 343 places, 317 transitions, 3488 flow [2024-06-21 18:23:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3488, PETRI_PLACES=343, PETRI_TRANSITIONS=317} [2024-06-21 18:23:09,460 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2024-06-21 18:23:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 317 transitions, 3488 flow [2024-06-21 18:23:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:23:09,461 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:09,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 357175955, now seen corresponding path program 11 times [2024-06-21 18:23:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667959013] [2024-06-21 18:23:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667959013] [2024-06-21 18:23:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667959013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:10,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636347940] [2024-06-21 18:23:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:10,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:10,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:10,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 317 transitions, 3488 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:10,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:10,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:11,483 INFO L124 PetriNetUnfolderBase]: 608/1159 cut-off events. [2024-06-21 18:23:11,484 INFO L125 PetriNetUnfolderBase]: For 196219/196219 co-relation queries the response was YES. [2024-06-21 18:23:11,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9415 conditions, 1159 events. 608/1159 cut-off events. For 196219/196219 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 6673 event pairs, 42 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 9256. Up to 1000 conditions per place. [2024-06-21 18:23:11,495 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 297 selfloop transitions, 33 changer transitions 0/333 dead transitions. [2024-06-21 18:23:11,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 333 transitions, 4220 flow [2024-06-21 18:23:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:23:11,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:23:11,496 INFO L175 Difference]: Start difference. First operand has 343 places, 317 transitions, 3488 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:23:11,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 333 transitions, 4220 flow [2024-06-21 18:23:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 333 transitions, 4136 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:12,096 INFO L231 Difference]: Finished difference. Result has 345 places, 318 transitions, 3510 flow [2024-06-21 18:23:12,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3510, PETRI_PLACES=345, PETRI_TRANSITIONS=318} [2024-06-21 18:23:12,097 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-21 18:23:12,097 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 318 transitions, 3510 flow [2024-06-21 18:23:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:12,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:12,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:12,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:23:12,097 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:12,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash -373983021, now seen corresponding path program 12 times [2024-06-21 18:23:12,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:12,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746233718] [2024-06-21 18:23:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:12,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746233718] [2024-06-21 18:23:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746233718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627481211] [2024-06-21 18:23:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:13,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:13,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 318 transitions, 3510 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:13,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:13,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:13,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:14,039 INFO L124 PetriNetUnfolderBase]: 612/1167 cut-off events. [2024-06-21 18:23:14,039 INFO L125 PetriNetUnfolderBase]: For 199477/199477 co-relation queries the response was YES. [2024-06-21 18:23:14,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9487 conditions, 1167 events. 612/1167 cut-off events. For 199477/199477 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 6715 event pairs, 35 based on Foata normal form. 2/1168 useless extension candidates. Maximal degree in co-relation 9327. Up to 1017 conditions per place. [2024-06-21 18:23:14,054 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 304 selfloop transitions, 27 changer transitions 0/334 dead transitions. [2024-06-21 18:23:14,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 334 transitions, 4248 flow [2024-06-21 18:23:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:23:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:23:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:23:14,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:23:14,055 INFO L175 Difference]: Start difference. First operand has 345 places, 318 transitions, 3510 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:23:14,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 334 transitions, 4248 flow [2024-06-21 18:23:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 334 transitions, 4152 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:14,710 INFO L231 Difference]: Finished difference. Result has 347 places, 319 transitions, 3510 flow [2024-06-21 18:23:14,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3510, PETRI_PLACES=347, PETRI_TRANSITIONS=319} [2024-06-21 18:23:14,710 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-21 18:23:14,710 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 319 transitions, 3510 flow [2024-06-21 18:23:14,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:14,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:14,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:14,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:23:14,710 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:14,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash -374043471, now seen corresponding path program 13 times [2024-06-21 18:23:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:14,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787248123] [2024-06-21 18:23:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:14,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:15,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:15,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787248123] [2024-06-21 18:23:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787248123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:15,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:15,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:15,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264953610] [2024-06-21 18:23:15,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:15,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:15,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:16,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 319 transitions, 3510 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:16,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:16,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:16,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:16,475 INFO L124 PetriNetUnfolderBase]: 616/1175 cut-off events. [2024-06-21 18:23:16,475 INFO L125 PetriNetUnfolderBase]: For 202983/202983 co-relation queries the response was YES. [2024-06-21 18:23:16,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9537 conditions, 1175 events. 616/1175 cut-off events. For 202983/202983 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 6776 event pairs, 33 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 9376. Up to 1016 conditions per place. [2024-06-21 18:23:16,489 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 309 selfloop transitions, 25 changer transitions 0/337 dead transitions. [2024-06-21 18:23:16,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 337 transitions, 4262 flow [2024-06-21 18:23:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:23:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:23:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 18:23:16,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 18:23:16,491 INFO L175 Difference]: Start difference. First operand has 347 places, 319 transitions, 3510 flow. Second operand 9 states and 118 transitions. [2024-06-21 18:23:16,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 337 transitions, 4262 flow [2024-06-21 18:23:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 337 transitions, 4163 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:17,165 INFO L231 Difference]: Finished difference. Result has 348 places, 320 transitions, 3505 flow [2024-06-21 18:23:17,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3411, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3505, PETRI_PLACES=348, PETRI_TRANSITIONS=320} [2024-06-21 18:23:17,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2024-06-21 18:23:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 320 transitions, 3505 flow [2024-06-21 18:23:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:17,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:17,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:23:17,166 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:17,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash -255895341, now seen corresponding path program 14 times [2024-06-21 18:23:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167293545] [2024-06-21 18:23:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:17,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167293545] [2024-06-21 18:23:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167293545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:18,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593410793] [2024-06-21 18:23:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:18,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:18,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 320 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:18,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:18,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:19,055 INFO L124 PetriNetUnfolderBase]: 620/1183 cut-off events. [2024-06-21 18:23:19,055 INFO L125 PetriNetUnfolderBase]: For 206606/206606 co-relation queries the response was YES. [2024-06-21 18:23:19,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 1183 events. 620/1183 cut-off events. For 206606/206606 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6848 event pairs, 35 based on Foata normal form. 2/1184 useless extension candidates. Maximal degree in co-relation 9427. Up to 1027 conditions per place. [2024-06-21 18:23:19,069 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 303 selfloop transitions, 29 changer transitions 0/335 dead transitions. [2024-06-21 18:23:19,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 335 transitions, 4245 flow [2024-06-21 18:23:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:23:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:23:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 18:23:19,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 18:23:19,070 INFO L175 Difference]: Start difference. First operand has 348 places, 320 transitions, 3505 flow. Second operand 9 states and 118 transitions. [2024-06-21 18:23:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 335 transitions, 4245 flow [2024-06-21 18:23:19,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 335 transitions, 4155 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:19,855 INFO L231 Difference]: Finished difference. Result has 349 places, 321 transitions, 3519 flow [2024-06-21 18:23:19,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3415, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3519, PETRI_PLACES=349, PETRI_TRANSITIONS=321} [2024-06-21 18:23:19,855 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-21 18:23:19,855 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 321 transitions, 3519 flow [2024-06-21 18:23:19,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:19,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:19,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:23:19,855 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:19,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash -90256207, now seen corresponding path program 15 times [2024-06-21 18:23:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117317891] [2024-06-21 18:23:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:19,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117317891] [2024-06-21 18:23:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117317891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:21,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:21,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:23:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044064870] [2024-06-21 18:23:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:21,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:23:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:23:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:23:21,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:21,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 321 transitions, 3519 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:21,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:21,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:21,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:21,860 INFO L124 PetriNetUnfolderBase]: 617/1178 cut-off events. [2024-06-21 18:23:21,860 INFO L125 PetriNetUnfolderBase]: For 194784/194784 co-relation queries the response was YES. [2024-06-21 18:23:21,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1178 events. 617/1178 cut-off events. For 194784/194784 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6840 event pairs, 38 based on Foata normal form. 2/1179 useless extension candidates. Maximal degree in co-relation 9095. Up to 1001 conditions per place. [2024-06-21 18:23:21,874 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 291 selfloop transitions, 40 changer transitions 0/334 dead transitions. [2024-06-21 18:23:21,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 334 transitions, 4213 flow [2024-06-21 18:23:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:23:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:23:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 18:23:21,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:23:21,875 INFO L175 Difference]: Start difference. First operand has 349 places, 321 transitions, 3519 flow. Second operand 9 states and 117 transitions. [2024-06-21 18:23:21,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 334 transitions, 4213 flow [2024-06-21 18:23:22,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 334 transitions, 4119 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:23:22,449 INFO L231 Difference]: Finished difference. Result has 351 places, 321 transitions, 3509 flow [2024-06-21 18:23:22,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3509, PETRI_PLACES=351, PETRI_TRANSITIONS=321} [2024-06-21 18:23:22,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2024-06-21 18:23:22,449 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 321 transitions, 3509 flow [2024-06-21 18:23:22,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 18:23:22,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:22,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:22,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:23:22,449 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:22,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:22,450 INFO L85 PathProgramCache]: Analyzing trace with hash 86278894, now seen corresponding path program 1 times [2024-06-21 18:23:22,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:22,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671398458] [2024-06-21 18:23:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:22,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671398458] [2024-06-21 18:23:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671398458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:24,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:24,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:23:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723735376] [2024-06-21 18:23:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:24,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:23:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:24,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:23:24,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:23:24,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:24,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 321 transitions, 3509 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:24,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:24,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:24,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:25,153 INFO L124 PetriNetUnfolderBase]: 621/1187 cut-off events. [2024-06-21 18:23:25,154 INFO L125 PetriNetUnfolderBase]: For 194926/194926 co-relation queries the response was YES. [2024-06-21 18:23:25,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9263 conditions, 1187 events. 621/1187 cut-off events. For 194926/194926 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6925 event pairs, 47 based on Foata normal form. 2/1188 useless extension candidates. Maximal degree in co-relation 9103. Up to 1033 conditions per place. [2024-06-21 18:23:25,168 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 304 selfloop transitions, 29 changer transitions 0/336 dead transitions. [2024-06-21 18:23:25,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 336 transitions, 4228 flow [2024-06-21 18:23:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 18:23:25,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 18:23:25,169 INFO L175 Difference]: Start difference. First operand has 351 places, 321 transitions, 3509 flow. Second operand 11 states and 131 transitions. [2024-06-21 18:23:25,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 336 transitions, 4228 flow [2024-06-21 18:23:25,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 336 transitions, 4060 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:25,754 INFO L231 Difference]: Finished difference. Result has 355 places, 323 transitions, 3429 flow [2024-06-21 18:23:25,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3429, PETRI_PLACES=355, PETRI_TRANSITIONS=323} [2024-06-21 18:23:25,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 325 predicate places. [2024-06-21 18:23:25,754 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 323 transitions, 3429 flow [2024-06-21 18:23:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:25,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:25,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:23:25,754 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:25,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 86275174, now seen corresponding path program 2 times [2024-06-21 18:23:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279757926] [2024-06-21 18:23:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279757926] [2024-06-21 18:23:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279757926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:27,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035471807] [2024-06-21 18:23:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:27,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:27,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 323 transitions, 3429 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:27,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:27,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:27,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:28,257 INFO L124 PetriNetUnfolderBase]: 625/1195 cut-off events. [2024-06-21 18:23:28,258 INFO L125 PetriNetUnfolderBase]: For 196889/196889 co-relation queries the response was YES. [2024-06-21 18:23:28,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9201 conditions, 1195 events. 625/1195 cut-off events. For 196889/196889 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6975 event pairs, 47 based on Foata normal form. 2/1196 useless extension candidates. Maximal degree in co-relation 9038. Up to 1036 conditions per place. [2024-06-21 18:23:28,272 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 307 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2024-06-21 18:23:28,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 338 transitions, 4147 flow [2024-06-21 18:23:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 18:23:28,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 18:23:28,273 INFO L175 Difference]: Start difference. First operand has 355 places, 323 transitions, 3429 flow. Second operand 11 states and 131 transitions. [2024-06-21 18:23:28,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 338 transitions, 4147 flow [2024-06-21 18:23:28,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 338 transitions, 4086 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:23:28,972 INFO L231 Difference]: Finished difference. Result has 358 places, 324 transitions, 3442 flow [2024-06-21 18:23:28,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3442, PETRI_PLACES=358, PETRI_TRANSITIONS=324} [2024-06-21 18:23:28,972 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2024-06-21 18:23:28,972 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 324 transitions, 3442 flow [2024-06-21 18:23:28,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:28,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:28,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:28,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:23:28,973 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:28,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash 84401224, now seen corresponding path program 3 times [2024-06-21 18:23:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798708988] [2024-06-21 18:23:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:30,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798708988] [2024-06-21 18:23:30,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798708988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:30,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:30,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790621975] [2024-06-21 18:23:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:30,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:30,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 324 transitions, 3442 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:30,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:30,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:30,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:31,193 INFO L124 PetriNetUnfolderBase]: 629/1203 cut-off events. [2024-06-21 18:23:31,193 INFO L125 PetriNetUnfolderBase]: For 199595/199595 co-relation queries the response was YES. [2024-06-21 18:23:31,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9264 conditions, 1203 events. 629/1203 cut-off events. For 199595/199595 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 7037 event pairs, 47 based on Foata normal form. 2/1204 useless extension candidates. Maximal degree in co-relation 9100. Up to 1035 conditions per place. [2024-06-21 18:23:31,208 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 311 selfloop transitions, 27 changer transitions 0/341 dead transitions. [2024-06-21 18:23:31,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 341 transitions, 4174 flow [2024-06-21 18:23:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 18:23:31,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:23:31,209 INFO L175 Difference]: Start difference. First operand has 358 places, 324 transitions, 3442 flow. Second operand 11 states and 132 transitions. [2024-06-21 18:23:31,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 341 transitions, 4174 flow [2024-06-21 18:23:31,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 341 transitions, 4110 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:31,894 INFO L231 Difference]: Finished difference. Result has 360 places, 325 transitions, 3452 flow [2024-06-21 18:23:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3452, PETRI_PLACES=360, PETRI_TRANSITIONS=325} [2024-06-21 18:23:31,894 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 330 predicate places. [2024-06-21 18:23:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 325 transitions, 3452 flow [2024-06-21 18:23:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:31,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:23:31,895 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash -542463792, now seen corresponding path program 4 times [2024-06-21 18:23:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:31,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358761206] [2024-06-21 18:23:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358761206] [2024-06-21 18:23:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358761206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:33,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140762140] [2024-06-21 18:23:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:33,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:33,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 325 transitions, 3452 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:33,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:33,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:33,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:34,421 INFO L124 PetriNetUnfolderBase]: 633/1211 cut-off events. [2024-06-21 18:23:34,421 INFO L125 PetriNetUnfolderBase]: For 203739/203739 co-relation queries the response was YES. [2024-06-21 18:23:34,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9327 conditions, 1211 events. 633/1211 cut-off events. For 203739/203739 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7110 event pairs, 51 based on Foata normal form. 2/1212 useless extension candidates. Maximal degree in co-relation 9162. Up to 1042 conditions per place. [2024-06-21 18:23:34,436 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 298 selfloop transitions, 37 changer transitions 0/338 dead transitions. [2024-06-21 18:23:34,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 338 transitions, 4168 flow [2024-06-21 18:23:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:23:34,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:23:34,437 INFO L175 Difference]: Start difference. First operand has 360 places, 325 transitions, 3452 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:23:34,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 338 transitions, 4168 flow [2024-06-21 18:23:35,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 338 transitions, 4104 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:35,073 INFO L231 Difference]: Finished difference. Result has 362 places, 326 transitions, 3484 flow [2024-06-21 18:23:35,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3484, PETRI_PLACES=362, PETRI_TRANSITIONS=326} [2024-06-21 18:23:35,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 332 predicate places. [2024-06-21 18:23:35,073 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 326 transitions, 3484 flow [2024-06-21 18:23:35,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:35,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:35,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:35,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:23:35,074 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:35,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1621474346, now seen corresponding path program 5 times [2024-06-21 18:23:35,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:35,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735040374] [2024-06-21 18:23:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:35,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:36,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735040374] [2024-06-21 18:23:36,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735040374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:36,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:36,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961256107] [2024-06-21 18:23:36,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:36,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:36,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:37,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:37,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 326 transitions, 3484 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:37,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:37,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:37,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:37,590 INFO L124 PetriNetUnfolderBase]: 637/1219 cut-off events. [2024-06-21 18:23:37,590 INFO L125 PetriNetUnfolderBase]: For 206959/206959 co-relation queries the response was YES. [2024-06-21 18:23:37,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9405 conditions, 1219 events. 637/1219 cut-off events. For 206959/206959 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 7171 event pairs, 53 based on Foata normal form. 2/1220 useless extension candidates. Maximal degree in co-relation 9239. Up to 1059 conditions per place. [2024-06-21 18:23:37,604 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 304 selfloop transitions, 32 changer transitions 0/339 dead transitions. [2024-06-21 18:23:37,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 339 transitions, 4204 flow [2024-06-21 18:23:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 18:23:37,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:23:37,605 INFO L175 Difference]: Start difference. First operand has 362 places, 326 transitions, 3484 flow. Second operand 11 states and 132 transitions. [2024-06-21 18:23:37,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 339 transitions, 4204 flow [2024-06-21 18:23:38,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 339 transitions, 4118 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:38,285 INFO L231 Difference]: Finished difference. Result has 364 places, 327 transitions, 3486 flow [2024-06-21 18:23:38,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3486, PETRI_PLACES=364, PETRI_TRANSITIONS=327} [2024-06-21 18:23:38,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2024-06-21 18:23:38,285 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 327 transitions, 3486 flow [2024-06-21 18:23:38,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:38,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:38,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:23:38,286 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:38,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -547974042, now seen corresponding path program 6 times [2024-06-21 18:23:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:38,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303222685] [2024-06-21 18:23:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:38,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:39,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:39,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303222685] [2024-06-21 18:23:39,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303222685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:39,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587118588] [2024-06-21 18:23:39,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:39,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:40,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:23:40,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 327 transitions, 3486 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:40,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:40,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:23:40,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:40,588 INFO L124 PetriNetUnfolderBase]: 641/1227 cut-off events. [2024-06-21 18:23:40,588 INFO L125 PetriNetUnfolderBase]: For 210296/210296 co-relation queries the response was YES. [2024-06-21 18:23:40,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9456 conditions, 1227 events. 641/1227 cut-off events. For 210296/210296 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 7228 event pairs, 51 based on Foata normal form. 2/1228 useless extension candidates. Maximal degree in co-relation 9289. Up to 1062 conditions per place. [2024-06-21 18:23:40,602 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 307 selfloop transitions, 31 changer transitions 0/341 dead transitions. [2024-06-21 18:23:40,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 341 transitions, 4214 flow [2024-06-21 18:23:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 18:23:40,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:23:40,603 INFO L175 Difference]: Start difference. First operand has 364 places, 327 transitions, 3486 flow. Second operand 11 states and 132 transitions. [2024-06-21 18:23:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 341 transitions, 4214 flow [2024-06-21 18:23:41,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 341 transitions, 4136 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:41,359 INFO L231 Difference]: Finished difference. Result has 366 places, 328 transitions, 3496 flow [2024-06-21 18:23:41,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3496, PETRI_PLACES=366, PETRI_TRANSITIONS=328} [2024-06-21 18:23:41,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 18:23:41,360 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 328 transitions, 3496 flow [2024-06-21 18:23:41,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:23:41,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:41,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:41,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:23:41,361 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:41,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1627044488, now seen corresponding path program 1 times [2024-06-21 18:23:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919427515] [2024-06-21 18:23:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:43,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:43,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919427515] [2024-06-21 18:23:43,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919427515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:43,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:43,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:23:43,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653326689] [2024-06-21 18:23:43,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:43,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:23:43,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:23:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:23:43,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:23:43,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 328 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:23:43,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:43,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:23:43,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:44,553 INFO L124 PetriNetUnfolderBase]: 644/1231 cut-off events. [2024-06-21 18:23:44,554 INFO L125 PetriNetUnfolderBase]: For 205489/205489 co-relation queries the response was YES. [2024-06-21 18:23:44,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 1231 events. 644/1231 cut-off events. For 205489/205489 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7247 event pairs, 55 based on Foata normal form. 1/1231 useless extension candidates. Maximal degree in co-relation 9330. Up to 973 conditions per place. [2024-06-21 18:23:44,568 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 269 selfloop transitions, 73 changer transitions 0/345 dead transitions. [2024-06-21 18:23:44,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 345 transitions, 4506 flow [2024-06-21 18:23:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:23:44,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:23:44,569 INFO L175 Difference]: Start difference. First operand has 366 places, 328 transitions, 3496 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:23:44,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 345 transitions, 4506 flow [2024-06-21 18:23:45,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 345 transitions, 4428 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:45,343 INFO L231 Difference]: Finished difference. Result has 368 places, 330 transitions, 3603 flow [2024-06-21 18:23:45,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3603, PETRI_PLACES=368, PETRI_TRANSITIONS=330} [2024-06-21 18:23:45,344 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 338 predicate places. [2024-06-21 18:23:45,344 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 330 transitions, 3603 flow [2024-06-21 18:23:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:23:45,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:45,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:45,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:23:45,344 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:45,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -547820220, now seen corresponding path program 2 times [2024-06-21 18:23:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644874149] [2024-06-21 18:23:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644874149] [2024-06-21 18:23:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644874149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:48,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:23:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098548637] [2024-06-21 18:23:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:23:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:23:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:23:48,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:23:48,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 330 transitions, 3603 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:48,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:48,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:23:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:48,910 INFO L124 PetriNetUnfolderBase]: 647/1236 cut-off events. [2024-06-21 18:23:48,910 INFO L125 PetriNetUnfolderBase]: For 208829/208829 co-relation queries the response was YES. [2024-06-21 18:23:48,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9630 conditions, 1236 events. 647/1236 cut-off events. For 208829/208829 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7299 event pairs, 56 based on Foata normal form. 1/1236 useless extension candidates. Maximal degree in co-relation 9461. Up to 1046 conditions per place. [2024-06-21 18:23:48,925 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 291 selfloop transitions, 52 changer transitions 0/346 dead transitions. [2024-06-21 18:23:48,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 346 transitions, 4361 flow [2024-06-21 18:23:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 18:23:48,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:23:48,926 INFO L175 Difference]: Start difference. First operand has 368 places, 330 transitions, 3603 flow. Second operand 11 states and 143 transitions. [2024-06-21 18:23:48,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 346 transitions, 4361 flow [2024-06-21 18:23:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 346 transitions, 4187 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:49,709 INFO L231 Difference]: Finished difference. Result has 370 places, 332 transitions, 3580 flow [2024-06-21 18:23:49,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3580, PETRI_PLACES=370, PETRI_TRANSITIONS=332} [2024-06-21 18:23:49,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2024-06-21 18:23:49,709 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 332 transitions, 3580 flow [2024-06-21 18:23:49,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:49,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:49,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:23:49,710 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:49,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -542248311, now seen corresponding path program 1 times [2024-06-21 18:23:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156866070] [2024-06-21 18:23:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:51,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156866070] [2024-06-21 18:23:51,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156866070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:51,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:51,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:23:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289404870] [2024-06-21 18:23:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:23:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:23:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:23:52,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:23:52,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 332 transitions, 3580 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:52,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:52,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:23:52,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:52,572 INFO L124 PetriNetUnfolderBase]: 663/1270 cut-off events. [2024-06-21 18:23:52,572 INFO L125 PetriNetUnfolderBase]: For 286330/286330 co-relation queries the response was YES. [2024-06-21 18:23:52,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 1270 events. 663/1270 cut-off events. For 286330/286330 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7539 event pairs, 61 based on Foata normal form. 10/1279 useless extension candidates. Maximal degree in co-relation 9587. Up to 1032 conditions per place. [2024-06-21 18:23:52,588 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 292 selfloop transitions, 52 changer transitions 4/351 dead transitions. [2024-06-21 18:23:52,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 351 transitions, 4370 flow [2024-06-21 18:23:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 18:23:52,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 18:23:52,589 INFO L175 Difference]: Start difference. First operand has 370 places, 332 transitions, 3580 flow. Second operand 11 states and 149 transitions. [2024-06-21 18:23:52,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 351 transitions, 4370 flow [2024-06-21 18:23:53,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 351 transitions, 4245 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:53,345 INFO L231 Difference]: Finished difference. Result has 372 places, 332 transitions, 3575 flow [2024-06-21 18:23:53,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3455, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3575, PETRI_PLACES=372, PETRI_TRANSITIONS=332} [2024-06-21 18:23:53,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2024-06-21 18:23:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 332 transitions, 3575 flow [2024-06-21 18:23:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:23:53,346 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash -542457840, now seen corresponding path program 3 times [2024-06-21 18:23:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587058077] [2024-06-21 18:23:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:23:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:23:55,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:23:55,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587058077] [2024-06-21 18:23:55,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587058077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:23:55,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:23:55,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:23:55,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493824336] [2024-06-21 18:23:55,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:23:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:23:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:23:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:23:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:23:55,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:23:55,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 332 transitions, 3575 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:55,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:23:55,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:23:55,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:23:56,817 INFO L124 PetriNetUnfolderBase]: 655/1259 cut-off events. [2024-06-21 18:23:56,817 INFO L125 PetriNetUnfolderBase]: For 206797/206797 co-relation queries the response was YES. [2024-06-21 18:23:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9581 conditions, 1259 events. 655/1259 cut-off events. For 206797/206797 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7484 event pairs, 59 based on Foata normal form. 1/1259 useless extension candidates. Maximal degree in co-relation 9410. Up to 1001 conditions per place. [2024-06-21 18:23:56,833 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 272 selfloop transitions, 71 changer transitions 0/346 dead transitions. [2024-06-21 18:23:56,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 346 transitions, 4295 flow [2024-06-21 18:23:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:23:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:23:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:23:56,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:23:56,835 INFO L175 Difference]: Start difference. First operand has 372 places, 332 transitions, 3575 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:23:56,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 346 transitions, 4295 flow [2024-06-21 18:23:57,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 346 transitions, 4165 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:23:57,655 INFO L231 Difference]: Finished difference. Result has 374 places, 332 transitions, 3592 flow [2024-06-21 18:23:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3592, PETRI_PLACES=374, PETRI_TRANSITIONS=332} [2024-06-21 18:23:57,655 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2024-06-21 18:23:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 332 transitions, 3592 flow [2024-06-21 18:23:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:23:57,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:23:57,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:23:57,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:23:57,655 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:23:57,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:23:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1634345302, now seen corresponding path program 7 times [2024-06-21 18:23:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:23:57,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994733110] [2024-06-21 18:23:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:23:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:23:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994733110] [2024-06-21 18:24:00,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994733110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:00,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:00,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:24:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144874896] [2024-06-21 18:24:00,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:24:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:24:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:24:00,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:24:00,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 332 transitions, 3592 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:00,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:00,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:24:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:00,993 INFO L124 PetriNetUnfolderBase]: 659/1268 cut-off events. [2024-06-21 18:24:00,993 INFO L125 PetriNetUnfolderBase]: For 218823/218823 co-relation queries the response was YES. [2024-06-21 18:24:01,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9660 conditions, 1268 events. 659/1268 cut-off events. For 218823/218823 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7568 event pairs, 55 based on Foata normal form. 2/1269 useless extension candidates. Maximal degree in co-relation 9488. Up to 1072 conditions per place. [2024-06-21 18:24:01,009 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 291 selfloop transitions, 50 changer transitions 0/344 dead transitions. [2024-06-21 18:24:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 344 transitions, 4322 flow [2024-06-21 18:24:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:24:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:24:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 18:24:01,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 18:24:01,010 INFO L175 Difference]: Start difference. First operand has 374 places, 332 transitions, 3592 flow. Second operand 10 states and 128 transitions. [2024-06-21 18:24:01,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 344 transitions, 4322 flow [2024-06-21 18:24:01,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 344 transitions, 4119 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 18:24:01,813 INFO L231 Difference]: Finished difference. Result has 373 places, 333 transitions, 3517 flow [2024-06-21 18:24:01,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3517, PETRI_PLACES=373, PETRI_TRANSITIONS=333} [2024-06-21 18:24:01,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 343 predicate places. [2024-06-21 18:24:01,814 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 333 transitions, 3517 flow [2024-06-21 18:24:01,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:01,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:01,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:01,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:24:01,814 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:01,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1828284712, now seen corresponding path program 8 times [2024-06-21 18:24:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:01,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419692554] [2024-06-21 18:24:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:01,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:04,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419692554] [2024-06-21 18:24:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419692554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998512994] [2024-06-21 18:24:04,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:04,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:04,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:24:04,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 333 transitions, 3517 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:04,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:04,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:24:04,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:04,881 INFO L124 PetriNetUnfolderBase]: 663/1276 cut-off events. [2024-06-21 18:24:04,881 INFO L125 PetriNetUnfolderBase]: For 222187/222187 co-relation queries the response was YES. [2024-06-21 18:24:04,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 1276 events. 663/1276 cut-off events. For 222187/222187 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7611 event pairs, 57 based on Foata normal form. 2/1277 useless extension candidates. Maximal degree in co-relation 9475. Up to 1101 conditions per place. [2024-06-21 18:24:04,895 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 303 selfloop transitions, 39 changer transitions 0/345 dead transitions. [2024-06-21 18:24:04,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 345 transitions, 4251 flow [2024-06-21 18:24:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:24:04,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:24:04,900 INFO L175 Difference]: Start difference. First operand has 373 places, 333 transitions, 3517 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:24:04,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 345 transitions, 4251 flow [2024-06-21 18:24:05,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 345 transitions, 4089 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:05,714 INFO L231 Difference]: Finished difference. Result has 375 places, 334 transitions, 3463 flow [2024-06-21 18:24:05,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3463, PETRI_PLACES=375, PETRI_TRANSITIONS=334} [2024-06-21 18:24:05,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2024-06-21 18:24:05,715 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 334 transitions, 3463 flow [2024-06-21 18:24:05,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:05,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:05,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:05,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:24:05,716 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:05,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:05,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1833647092, now seen corresponding path program 9 times [2024-06-21 18:24:05,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:05,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029557828] [2024-06-21 18:24:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:05,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:08,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029557828] [2024-06-21 18:24:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029557828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798116260] [2024-06-21 18:24:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:08,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:24:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 334 transitions, 3463 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:24:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:08,948 INFO L124 PetriNetUnfolderBase]: 667/1284 cut-off events. [2024-06-21 18:24:08,949 INFO L125 PetriNetUnfolderBase]: For 225331/225331 co-relation queries the response was YES. [2024-06-21 18:24:08,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9628 conditions, 1284 events. 667/1284 cut-off events. For 225331/225331 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 7698 event pairs, 59 based on Foata normal form. 2/1285 useless extension candidates. Maximal degree in co-relation 9455. Up to 1115 conditions per place. [2024-06-21 18:24:08,963 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 307 selfloop transitions, 36 changer transitions 0/346 dead transitions. [2024-06-21 18:24:08,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 346 transitions, 4201 flow [2024-06-21 18:24:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:24:08,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:24:08,964 INFO L175 Difference]: Start difference. First operand has 375 places, 334 transitions, 3463 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:24:08,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 346 transitions, 4201 flow [2024-06-21 18:24:09,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 346 transitions, 4103 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:09,814 INFO L231 Difference]: Finished difference. Result has 377 places, 335 transitions, 3469 flow [2024-06-21 18:24:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3469, PETRI_PLACES=377, PETRI_TRANSITIONS=335} [2024-06-21 18:24:09,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2024-06-21 18:24:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 335 transitions, 3469 flow [2024-06-21 18:24:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:09,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:24:09,815 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:09,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1833794962, now seen corresponding path program 10 times [2024-06-21 18:24:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:09,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591384263] [2024-06-21 18:24:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:09,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:11,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:11,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591384263] [2024-06-21 18:24:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591384263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:11,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:11,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364265585] [2024-06-21 18:24:11,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:12,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:24:12,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 335 transitions, 3469 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:12,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:12,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:24:12,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:12,623 INFO L124 PetriNetUnfolderBase]: 671/1292 cut-off events. [2024-06-21 18:24:12,623 INFO L125 PetriNetUnfolderBase]: For 228792/228792 co-relation queries the response was YES. [2024-06-21 18:24:12,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9682 conditions, 1292 events. 671/1292 cut-off events. For 228792/228792 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 7780 event pairs, 57 based on Foata normal form. 2/1293 useless extension candidates. Maximal degree in co-relation 9508. Up to 1118 conditions per place. [2024-06-21 18:24:12,635 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 310 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-21 18:24:12,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 348 transitions, 4215 flow [2024-06-21 18:24:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:24:12,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:24:12,636 INFO L175 Difference]: Start difference. First operand has 377 places, 335 transitions, 3469 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:24:12,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 348 transitions, 4215 flow [2024-06-21 18:24:13,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 348 transitions, 4121 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:13,456 INFO L231 Difference]: Finished difference. Result has 379 places, 336 transitions, 3479 flow [2024-06-21 18:24:13,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3479, PETRI_PLACES=379, PETRI_TRANSITIONS=336} [2024-06-21 18:24:13,456 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 349 predicate places. [2024-06-21 18:24:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 336 transitions, 3479 flow [2024-06-21 18:24:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:24:13,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:13,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:24:13,456 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:13,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash 297388018, now seen corresponding path program 4 times [2024-06-21 18:24:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910182277] [2024-06-21 18:24:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910182277] [2024-06-21 18:24:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910182277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:17,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:17,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408931305] [2024-06-21 18:24:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:17,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:17,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:17,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 336 transitions, 3479 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:17,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:17,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:19,267 INFO L124 PetriNetUnfolderBase]: 674/1297 cut-off events. [2024-06-21 18:24:19,267 INFO L125 PetriNetUnfolderBase]: For 222815/222815 co-relation queries the response was YES. [2024-06-21 18:24:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9712 conditions, 1297 events. 674/1297 cut-off events. For 222815/222815 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 7777 event pairs, 56 based on Foata normal form. 1/1297 useless extension candidates. Maximal degree in co-relation 9537. Up to 1055 conditions per place. [2024-06-21 18:24:19,284 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 278 selfloop transitions, 70 changer transitions 0/351 dead transitions. [2024-06-21 18:24:19,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 351 transitions, 4515 flow [2024-06-21 18:24:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 18:24:19,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 18:24:19,285 INFO L175 Difference]: Start difference. First operand has 379 places, 336 transitions, 3479 flow. Second operand 11 states and 149 transitions. [2024-06-21 18:24:19,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 351 transitions, 4515 flow [2024-06-21 18:24:20,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 351 transitions, 4421 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:20,085 INFO L231 Difference]: Finished difference. Result has 381 places, 338 transitions, 3568 flow [2024-06-21 18:24:20,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3568, PETRI_PLACES=381, PETRI_TRANSITIONS=338} [2024-06-21 18:24:20,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 351 predicate places. [2024-06-21 18:24:20,085 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 338 transitions, 3568 flow [2024-06-21 18:24:20,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:20,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:20,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:24:20,086 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 297597547, now seen corresponding path program 2 times [2024-06-21 18:24:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:20,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304549583] [2024-06-21 18:24:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304549583] [2024-06-21 18:24:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304549583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:22,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:22,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:22,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180149922] [2024-06-21 18:24:22,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:22,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:22,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:23,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 338 transitions, 3568 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:23,631 INFO L124 PetriNetUnfolderBase]: 678/1305 cut-off events. [2024-06-21 18:24:23,631 INFO L125 PetriNetUnfolderBase]: For 235492/235492 co-relation queries the response was YES. [2024-06-21 18:24:23,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9820 conditions, 1305 events. 678/1305 cut-off events. For 235492/235492 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7852 event pairs, 56 based on Foata normal form. 2/1306 useless extension candidates. Maximal degree in co-relation 9644. Up to 1110 conditions per place. [2024-06-21 18:24:23,648 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 300 selfloop transitions, 49 changer transitions 0/352 dead transitions. [2024-06-21 18:24:23,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 352 transitions, 4318 flow [2024-06-21 18:24:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:24:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:24:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 18:24:23,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 18:24:23,649 INFO L175 Difference]: Start difference. First operand has 381 places, 338 transitions, 3568 flow. Second operand 10 states and 134 transitions. [2024-06-21 18:24:23,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 352 transitions, 4318 flow [2024-06-21 18:24:24,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 352 transitions, 4150 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:24,453 INFO L231 Difference]: Finished difference. Result has 382 places, 339 transitions, 3526 flow [2024-06-21 18:24:24,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3526, PETRI_PLACES=382, PETRI_TRANSITIONS=339} [2024-06-21 18:24:24,454 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2024-06-21 18:24:24,454 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 339 transitions, 3526 flow [2024-06-21 18:24:24,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:24,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:24,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 18:24:24,454 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:24,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 491327428, now seen corresponding path program 5 times [2024-06-21 18:24:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040039793] [2024-06-21 18:24:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040039793] [2024-06-21 18:24:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040039793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:27,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282412054] [2024-06-21 18:24:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:27,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:27,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 339 transitions, 3526 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:27,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:27,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:27,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:28,677 INFO L124 PetriNetUnfolderBase]: 681/1310 cut-off events. [2024-06-21 18:24:28,678 INFO L125 PetriNetUnfolderBase]: For 229239/229239 co-relation queries the response was YES. [2024-06-21 18:24:28,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9827 conditions, 1310 events. 681/1310 cut-off events. For 229239/229239 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 7915 event pairs, 56 based on Foata normal form. 1/1310 useless extension candidates. Maximal degree in co-relation 9651. Up to 908 conditions per place. [2024-06-21 18:24:28,694 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 236 selfloop transitions, 116 changer transitions 0/355 dead transitions. [2024-06-21 18:24:28,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 355 transitions, 4850 flow [2024-06-21 18:24:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:24:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:24:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-21 18:24:28,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-06-21 18:24:28,695 INFO L175 Difference]: Start difference. First operand has 382 places, 339 transitions, 3526 flow. Second operand 10 states and 145 transitions. [2024-06-21 18:24:28,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 355 transitions, 4850 flow [2024-06-21 18:24:29,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 355 transitions, 4722 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:24:29,504 INFO L231 Difference]: Finished difference. Result has 384 places, 341 transitions, 3671 flow [2024-06-21 18:24:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3671, PETRI_PLACES=384, PETRI_TRANSITIONS=341} [2024-06-21 18:24:29,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 354 predicate places. [2024-06-21 18:24:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 341 transitions, 3671 flow [2024-06-21 18:24:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:29,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:29,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:29,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 18:24:29,505 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:29,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 491536957, now seen corresponding path program 3 times [2024-06-21 18:24:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929381127] [2024-06-21 18:24:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:32,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:32,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929381127] [2024-06-21 18:24:32,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929381127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:32,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:32,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109259515] [2024-06-21 18:24:32,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:32,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:32,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:32,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 341 transitions, 3671 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:32,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:32,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:32,917 INFO L124 PetriNetUnfolderBase]: 685/1318 cut-off events. [2024-06-21 18:24:32,917 INFO L125 PetriNetUnfolderBase]: For 242575/242575 co-relation queries the response was YES. [2024-06-21 18:24:32,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10007 conditions, 1318 events. 685/1318 cut-off events. For 242575/242575 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 7975 event pairs, 56 based on Foata normal form. 2/1319 useless extension candidates. Maximal degree in co-relation 9830. Up to 1064 conditions per place. [2024-06-21 18:24:32,933 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 285 selfloop transitions, 67 changer transitions 0/355 dead transitions. [2024-06-21 18:24:32,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 355 transitions, 4429 flow [2024-06-21 18:24:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 18:24:32,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 18:24:32,934 INFO L175 Difference]: Start difference. First operand has 384 places, 341 transitions, 3671 flow. Second operand 11 states and 146 transitions. [2024-06-21 18:24:32,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 355 transitions, 4429 flow [2024-06-21 18:24:33,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 355 transitions, 4192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:24:33,790 INFO L231 Difference]: Finished difference. Result has 388 places, 342 transitions, 3598 flow [2024-06-21 18:24:33,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3598, PETRI_PLACES=388, PETRI_TRANSITIONS=342} [2024-06-21 18:24:33,790 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2024-06-21 18:24:33,790 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 342 transitions, 3598 flow [2024-06-21 18:24:33,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:33,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:33,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:33,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 18:24:33,791 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:33,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 491529238, now seen corresponding path program 6 times [2024-06-21 18:24:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:33,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570315369] [2024-06-21 18:24:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:33,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:37,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570315369] [2024-06-21 18:24:37,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570315369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:37,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:37,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210810536] [2024-06-21 18:24:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:37,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:37,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 342 transitions, 3598 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:37,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:37,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:37,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:38,294 INFO L124 PetriNetUnfolderBase]: 683/1315 cut-off events. [2024-06-21 18:24:38,295 INFO L125 PetriNetUnfolderBase]: For 226143/226143 co-relation queries the response was YES. [2024-06-21 18:24:38,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9762 conditions, 1315 events. 683/1315 cut-off events. For 226143/226143 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 7963 event pairs, 56 based on Foata normal form. 1/1315 useless extension candidates. Maximal degree in co-relation 9583. Up to 914 conditions per place. [2024-06-21 18:24:38,310 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 241 selfloop transitions, 112 changer transitions 0/356 dead transitions. [2024-06-21 18:24:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 356 transitions, 4896 flow [2024-06-21 18:24:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-21 18:24:38,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:24:38,311 INFO L175 Difference]: Start difference. First operand has 388 places, 342 transitions, 3598 flow. Second operand 11 states and 154 transitions. [2024-06-21 18:24:38,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 356 transitions, 4896 flow [2024-06-21 18:24:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 356 transitions, 4720 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:39,154 INFO L231 Difference]: Finished difference. Result has 390 places, 342 transitions, 3651 flow [2024-06-21 18:24:39,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3651, PETRI_PLACES=390, PETRI_TRANSITIONS=342} [2024-06-21 18:24:39,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 360 predicate places. [2024-06-21 18:24:39,154 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 342 transitions, 3651 flow [2024-06-21 18:24:39,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:39,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:39,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 18:24:39,155 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:39,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 297589828, now seen corresponding path program 7 times [2024-06-21 18:24:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325662879] [2024-06-21 18:24:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325662879] [2024-06-21 18:24:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325662879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:24:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345854784] [2024-06-21 18:24:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:24:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:24:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:24:42,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:42,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 342 transitions, 3651 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:42,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:42,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:42,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:43,356 INFO L124 PetriNetUnfolderBase]: 681/1312 cut-off events. [2024-06-21 18:24:43,356 INFO L125 PetriNetUnfolderBase]: For 219348/219348 co-relation queries the response was YES. [2024-06-21 18:24:43,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9652 conditions, 1312 events. 681/1312 cut-off events. For 219348/219348 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 7918 event pairs, 56 based on Foata normal form. 1/1312 useless extension candidates. Maximal degree in co-relation 9472. Up to 1071 conditions per place. [2024-06-21 18:24:43,372 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 71 changer transitions 0/354 dead transitions. [2024-06-21 18:24:43,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 354 transitions, 4381 flow [2024-06-21 18:24:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 18:24:43,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 18:24:43,373 INFO L175 Difference]: Start difference. First operand has 390 places, 342 transitions, 3651 flow. Second operand 11 states and 147 transitions. [2024-06-21 18:24:43,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 354 transitions, 4381 flow [2024-06-21 18:24:44,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 354 transitions, 4103 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 18:24:44,210 INFO L231 Difference]: Finished difference. Result has 390 places, 342 transitions, 3520 flow [2024-06-21 18:24:44,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3520, PETRI_PLACES=390, PETRI_TRANSITIONS=342} [2024-06-21 18:24:44,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 360 predicate places. [2024-06-21 18:24:44,210 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 342 transitions, 3520 flow [2024-06-21 18:24:44,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:24:44,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:44,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 18:24:44,211 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:44,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 498679078, now seen corresponding path program 8 times [2024-06-21 18:24:44,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:44,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859611663] [2024-06-21 18:24:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:44,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:47,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859611663] [2024-06-21 18:24:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859611663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:47,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:47,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648450357] [2024-06-21 18:24:47,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:47,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:47,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 342 transitions, 3520 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:47,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:47,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:47,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:48,681 INFO L124 PetriNetUnfolderBase]: 679/1309 cut-off events. [2024-06-21 18:24:48,681 INFO L125 PetriNetUnfolderBase]: For 212064/212064 co-relation queries the response was YES. [2024-06-21 18:24:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 1309 events. 679/1309 cut-off events. For 212064/212064 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 7930 event pairs, 56 based on Foata normal form. 1/1309 useless extension candidates. Maximal degree in co-relation 9204. Up to 910 conditions per place. [2024-06-21 18:24:48,695 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 222 selfloop transitions, 129 changer transitions 0/354 dead transitions. [2024-06-21 18:24:48,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 354 transitions, 4250 flow [2024-06-21 18:24:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 18:24:48,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 18:24:48,697 INFO L175 Difference]: Start difference. First operand has 390 places, 342 transitions, 3520 flow. Second operand 11 states and 149 transitions. [2024-06-21 18:24:48,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 354 transitions, 4250 flow [2024-06-21 18:24:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 354 transitions, 4044 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 18:24:49,429 INFO L231 Difference]: Finished difference. Result has 390 places, 342 transitions, 3577 flow [2024-06-21 18:24:49,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3577, PETRI_PLACES=390, PETRI_TRANSITIONS=342} [2024-06-21 18:24:49,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 360 predicate places. [2024-06-21 18:24:49,430 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 342 transitions, 3577 flow [2024-06-21 18:24:49,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:49,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:49,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 18:24:49,430 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 498686797, now seen corresponding path program 4 times [2024-06-21 18:24:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:49,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689384068] [2024-06-21 18:24:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:52,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:52,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689384068] [2024-06-21 18:24:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689384068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:52,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:52,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:52,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206924229] [2024-06-21 18:24:52,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:52,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:52,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:52,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:52,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 342 transitions, 3577 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:52,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:52,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:52,826 INFO L124 PetriNetUnfolderBase]: 683/1317 cut-off events. [2024-06-21 18:24:52,826 INFO L125 PetriNetUnfolderBase]: For 225410/225410 co-relation queries the response was YES. [2024-06-21 18:24:52,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9542 conditions, 1317 events. 683/1317 cut-off events. For 225410/225410 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7993 event pairs, 58 based on Foata normal form. 2/1318 useless extension candidates. Maximal degree in co-relation 9360. Up to 1063 conditions per place. [2024-06-21 18:24:52,843 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 73 changer transitions 0/356 dead transitions. [2024-06-21 18:24:52,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 356 transitions, 4339 flow [2024-06-21 18:24:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 18:24:52,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 18:24:52,844 INFO L175 Difference]: Start difference. First operand has 390 places, 342 transitions, 3577 flow. Second operand 11 states and 146 transitions. [2024-06-21 18:24:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 356 transitions, 4339 flow [2024-06-21 18:24:53,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 356 transitions, 4070 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:24:53,662 INFO L231 Difference]: Finished difference. Result has 391 places, 343 transitions, 3486 flow [2024-06-21 18:24:53,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3486, PETRI_PLACES=391, PETRI_TRANSITIONS=343} [2024-06-21 18:24:53,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2024-06-21 18:24:53,663 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 343 transitions, 3486 flow [2024-06-21 18:24:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:53,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:53,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:53,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 18:24:53,663 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:53,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1626711211, now seen corresponding path program 5 times [2024-06-21 18:24:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:53,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582257920] [2024-06-21 18:24:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:53,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:24:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:24:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:24:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582257920] [2024-06-21 18:24:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582257920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:24:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:24:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:24:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919199430] [2024-06-21 18:24:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:24:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:24:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:24:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:24:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:24:57,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:24:57,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 343 transitions, 3486 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:57,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:24:57,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:24:57,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:24:58,288 INFO L124 PetriNetUnfolderBase]: 694/1338 cut-off events. [2024-06-21 18:24:58,288 INFO L125 PetriNetUnfolderBase]: For 249821/249821 co-relation queries the response was YES. [2024-06-21 18:24:58,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 1338 events. 694/1338 cut-off events. For 249821/249821 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8134 event pairs, 57 based on Foata normal form. 2/1339 useless extension candidates. Maximal degree in co-relation 9732. Up to 1003 conditions per place. [2024-06-21 18:24:58,305 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 270 selfloop transitions, 87 changer transitions 2/362 dead transitions. [2024-06-21 18:24:58,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 362 transitions, 4608 flow [2024-06-21 18:24:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:24:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:24:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 18:24:58,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2024-06-21 18:24:58,306 INFO L175 Difference]: Start difference. First operand has 391 places, 343 transitions, 3486 flow. Second operand 11 states and 151 transitions. [2024-06-21 18:24:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 362 transitions, 4608 flow [2024-06-21 18:24:59,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 362 transitions, 4440 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:24:59,183 INFO L231 Difference]: Finished difference. Result has 393 places, 345 transitions, 3554 flow [2024-06-21 18:24:59,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3554, PETRI_PLACES=393, PETRI_TRANSITIONS=345} [2024-06-21 18:24:59,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2024-06-21 18:24:59,183 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 345 transitions, 3554 flow [2024-06-21 18:24:59,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:24:59,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:24:59,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:24:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 18:24:59,184 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:24:59,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:24:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash 498946267, now seen corresponding path program 6 times [2024-06-21 18:24:59,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:24:59,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352931755] [2024-06-21 18:24:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:24:59,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:24:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352931755] [2024-06-21 18:25:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352931755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:02,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:02,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457444959] [2024-06-21 18:25:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:02,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 345 transitions, 3554 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:02,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:02,903 INFO L124 PetriNetUnfolderBase]: 691/1333 cut-off events. [2024-06-21 18:25:02,903 INFO L125 PetriNetUnfolderBase]: For 232171/232171 co-relation queries the response was YES. [2024-06-21 18:25:02,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9618 conditions, 1333 events. 691/1333 cut-off events. For 232171/232171 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8124 event pairs, 58 based on Foata normal form. 2/1334 useless extension candidates. Maximal degree in co-relation 9434. Up to 1013 conditions per place. [2024-06-21 18:25:02,919 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 250 selfloop transitions, 105 changer transitions 0/358 dead transitions. [2024-06-21 18:25:02,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 358 transitions, 4294 flow [2024-06-21 18:25:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:25:02,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:25:02,920 INFO L175 Difference]: Start difference. First operand has 393 places, 345 transitions, 3554 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:25:02,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 358 transitions, 4294 flow [2024-06-21 18:25:03,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 358 transitions, 4138 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:25:03,646 INFO L231 Difference]: Finished difference. Result has 397 places, 345 transitions, 3612 flow [2024-06-21 18:25:03,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3612, PETRI_PLACES=397, PETRI_TRANSITIONS=345} [2024-06-21 18:25:03,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 18:25:03,646 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 345 transitions, 3612 flow [2024-06-21 18:25:03,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:03,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:03,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 18:25:03,647 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:03,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1939267676, now seen corresponding path program 11 times [2024-06-21 18:25:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677510709] [2024-06-21 18:25:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:05,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:05,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677510709] [2024-06-21 18:25:05,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677510709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:05,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:05,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:25:05,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102728744] [2024-06-21 18:25:05,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:25:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:25:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:25:05,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:25:05,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 345 transitions, 3612 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:05,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:05,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:25:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:06,394 INFO L124 PetriNetUnfolderBase]: 695/1341 cut-off events. [2024-06-21 18:25:06,395 INFO L125 PetriNetUnfolderBase]: For 235081/235081 co-relation queries the response was YES. [2024-06-21 18:25:06,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9780 conditions, 1341 events. 695/1341 cut-off events. For 235081/235081 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8188 event pairs, 69 based on Foata normal form. 2/1342 useless extension candidates. Maximal degree in co-relation 9594. Up to 1130 conditions per place. [2024-06-21 18:25:06,412 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 296 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-21 18:25:06,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 356 transitions, 4370 flow [2024-06-21 18:25:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 18:25:06,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 18:25:06,413 INFO L175 Difference]: Start difference. First operand has 397 places, 345 transitions, 3612 flow. Second operand 11 states and 131 transitions. [2024-06-21 18:25:06,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 356 transitions, 4370 flow [2024-06-21 18:25:07,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 356 transitions, 4136 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 18:25:07,340 INFO L231 Difference]: Finished difference. Result has 398 places, 346 transitions, 3528 flow [2024-06-21 18:25:07,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3528, PETRI_PLACES=398, PETRI_TRANSITIONS=346} [2024-06-21 18:25:07,340 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2024-06-21 18:25:07,340 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 346 transitions, 3528 flow [2024-06-21 18:25:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:07,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:07,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:07,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 18:25:07,340 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:07,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1939415546, now seen corresponding path program 12 times [2024-06-21 18:25:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:07,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413767135] [2024-06-21 18:25:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:09,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:09,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413767135] [2024-06-21 18:25:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413767135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:09,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:09,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:25:09,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022422296] [2024-06-21 18:25:09,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:09,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:25:09,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:25:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:25:09,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:25:09,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 346 transitions, 3528 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:09,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:09,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:25:09,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:09,953 INFO L124 PetriNetUnfolderBase]: 699/1349 cut-off events. [2024-06-21 18:25:09,954 INFO L125 PetriNetUnfolderBase]: For 238620/238620 co-relation queries the response was YES. [2024-06-21 18:25:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9738 conditions, 1349 events. 699/1349 cut-off events. For 238620/238620 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 8240 event pairs, 67 based on Foata normal form. 2/1350 useless extension candidates. Maximal degree in co-relation 9551. Up to 1133 conditions per place. [2024-06-21 18:25:09,971 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 299 selfloop transitions, 56 changer transitions 0/358 dead transitions. [2024-06-21 18:25:09,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 358 transitions, 4294 flow [2024-06-21 18:25:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 18:25:09,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 18:25:09,972 INFO L175 Difference]: Start difference. First operand has 398 places, 346 transitions, 3528 flow. Second operand 11 states and 131 transitions. [2024-06-21 18:25:09,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 358 transitions, 4294 flow [2024-06-21 18:25:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 358 transitions, 4154 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:25:10,769 INFO L231 Difference]: Finished difference. Result has 400 places, 347 transitions, 3538 flow [2024-06-21 18:25:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3538, PETRI_PLACES=400, PETRI_TRANSITIONS=347} [2024-06-21 18:25:10,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2024-06-21 18:25:10,769 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 347 transitions, 3538 flow [2024-06-21 18:25:10,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:10,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:10,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:10,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 18:25:10,769 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:10,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:10,770 INFO L85 PathProgramCache]: Analyzing trace with hash -56111648, now seen corresponding path program 13 times [2024-06-21 18:25:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:10,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390434864] [2024-06-21 18:25:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390434864] [2024-06-21 18:25:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390434864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:13,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:25:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263538505] [2024-06-21 18:25:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:25:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:25:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:25:13,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:25:13,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 347 transitions, 3538 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:13,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:13,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:25:13,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:14,221 INFO L124 PetriNetUnfolderBase]: 703/1357 cut-off events. [2024-06-21 18:25:14,221 INFO L125 PetriNetUnfolderBase]: For 242135/242135 co-relation queries the response was YES. [2024-06-21 18:25:14,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9795 conditions, 1357 events. 703/1357 cut-off events. For 242135/242135 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8285 event pairs, 69 based on Foata normal form. 2/1358 useless extension candidates. Maximal degree in co-relation 9607. Up to 1045 conditions per place. [2024-06-21 18:25:14,235 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 249 selfloop transitions, 106 changer transitions 0/358 dead transitions. [2024-06-21 18:25:14,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 358 transitions, 4304 flow [2024-06-21 18:25:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:25:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:25:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 18:25:14,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 18:25:14,236 INFO L175 Difference]: Start difference. First operand has 400 places, 347 transitions, 3538 flow. Second operand 10 states and 127 transitions. [2024-06-21 18:25:14,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 358 transitions, 4304 flow [2024-06-21 18:25:15,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 358 transitions, 4164 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 18:25:15,116 INFO L231 Difference]: Finished difference. Result has 401 places, 348 transitions, 3650 flow [2024-06-21 18:25:15,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3650, PETRI_PLACES=401, PETRI_TRANSITIONS=348} [2024-06-21 18:25:15,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2024-06-21 18:25:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 348 transitions, 3650 flow [2024-06-21 18:25:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:15,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 18:25:15,117 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:15,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1933905296, now seen corresponding path program 14 times [2024-06-21 18:25:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741915518] [2024-06-21 18:25:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:17,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:17,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741915518] [2024-06-21 18:25:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741915518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:25:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92671055] [2024-06-21 18:25:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:25:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:25:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:25:17,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:25:17,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 348 transitions, 3650 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:17,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:17,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:25:17,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:18,546 INFO L124 PetriNetUnfolderBase]: 707/1365 cut-off events. [2024-06-21 18:25:18,546 INFO L125 PetriNetUnfolderBase]: For 245727/245727 co-relation queries the response was YES. [2024-06-21 18:25:18,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9956 conditions, 1365 events. 707/1365 cut-off events. For 245727/245727 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8374 event pairs, 69 based on Foata normal form. 2/1366 useless extension candidates. Maximal degree in co-relation 9767. Up to 1148 conditions per place. [2024-06-21 18:25:18,564 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 296 selfloop transitions, 60 changer transitions 0/359 dead transitions. [2024-06-21 18:25:18,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 359 transitions, 4420 flow [2024-06-21 18:25:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:25:18,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:25:18,565 INFO L175 Difference]: Start difference. First operand has 401 places, 348 transitions, 3650 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:25:18,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 359 transitions, 4420 flow [2024-06-21 18:25:19,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 359 transitions, 4178 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 18:25:19,488 INFO L231 Difference]: Finished difference. Result has 404 places, 349 transitions, 3570 flow [2024-06-21 18:25:19,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3570, PETRI_PLACES=404, PETRI_TRANSITIONS=349} [2024-06-21 18:25:19,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 374 predicate places. [2024-06-21 18:25:19,489 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 349 transitions, 3570 flow [2024-06-21 18:25:19,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:25:19,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:19,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:19,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:25:19,489 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:19,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1739965886, now seen corresponding path program 15 times [2024-06-21 18:25:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108606413] [2024-06-21 18:25:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:21,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:21,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108606413] [2024-06-21 18:25:21,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108606413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:21,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:25:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594133914] [2024-06-21 18:25:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:21,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:25:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:25:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:25:21,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:25:21,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 349 transitions, 3570 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:21,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:21,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:25:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:22,324 INFO L124 PetriNetUnfolderBase]: 711/1373 cut-off events. [2024-06-21 18:25:22,324 INFO L125 PetriNetUnfolderBase]: For 248917/248917 co-relation queries the response was YES. [2024-06-21 18:25:22,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9917 conditions, 1373 events. 711/1373 cut-off events. For 248917/248917 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 8416 event pairs, 71 based on Foata normal form. 2/1374 useless extension candidates. Maximal degree in co-relation 9727. Up to 1147 conditions per place. [2024-06-21 18:25:22,341 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 293 selfloop transitions, 64 changer transitions 0/360 dead transitions. [2024-06-21 18:25:22,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 360 transitions, 4344 flow [2024-06-21 18:25:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:25:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:25:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 18:25:22,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 18:25:22,342 INFO L175 Difference]: Start difference. First operand has 404 places, 349 transitions, 3570 flow. Second operand 10 states and 128 transitions. [2024-06-21 18:25:22,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 360 transitions, 4344 flow [2024-06-21 18:25:23,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 360 transitions, 4192 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:25:23,161 INFO L231 Difference]: Finished difference. Result has 405 places, 350 transitions, 3590 flow [2024-06-21 18:25:23,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3590, PETRI_PLACES=405, PETRI_TRANSITIONS=350} [2024-06-21 18:25:23,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2024-06-21 18:25:23,161 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 350 transitions, 3590 flow [2024-06-21 18:25:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:23,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:25:23,161 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash 285634380, now seen corresponding path program 9 times [2024-06-21 18:25:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093998112] [2024-06-21 18:25:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:25,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093998112] [2024-06-21 18:25:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093998112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:25,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501209027] [2024-06-21 18:25:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:25,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:25,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:25,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 350 transitions, 3590 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:26,352 INFO L124 PetriNetUnfolderBase]: 719/1392 cut-off events. [2024-06-21 18:25:26,352 INFO L125 PetriNetUnfolderBase]: For 250813/250813 co-relation queries the response was YES. [2024-06-21 18:25:26,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10155 conditions, 1392 events. 719/1392 cut-off events. For 250813/250813 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8566 event pairs, 73 based on Foata normal form. 1/1392 useless extension candidates. Maximal degree in co-relation 9964. Up to 1117 conditions per place. [2024-06-21 18:25:26,372 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 289 selfloop transitions, 75 changer transitions 0/367 dead transitions. [2024-06-21 18:25:26,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 367 transitions, 5324 flow [2024-06-21 18:25:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-21 18:25:26,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:25:26,373 INFO L175 Difference]: Start difference. First operand has 405 places, 350 transitions, 3590 flow. Second operand 11 states and 154 transitions. [2024-06-21 18:25:26,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 367 transitions, 5324 flow [2024-06-21 18:25:27,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 367 transitions, 5162 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 18:25:27,390 INFO L231 Difference]: Finished difference. Result has 408 places, 354 transitions, 3655 flow [2024-06-21 18:25:27,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3655, PETRI_PLACES=408, PETRI_TRANSITIONS=354} [2024-06-21 18:25:27,391 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 378 predicate places. [2024-06-21 18:25:27,391 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 354 transitions, 3655 flow [2024-06-21 18:25:27,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:27,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:27,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:25:27,391 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:27,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2131942775, now seen corresponding path program 7 times [2024-06-21 18:25:27,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:27,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335190382] [2024-06-21 18:25:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:29,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:29,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335190382] [2024-06-21 18:25:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335190382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:29,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:29,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:25:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997769414] [2024-06-21 18:25:29,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:29,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:25:29,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:25:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:25:29,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:29,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 354 transitions, 3655 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:25:29,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:29,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:29,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:30,373 INFO L124 PetriNetUnfolderBase]: 723/1400 cut-off events. [2024-06-21 18:25:30,373 INFO L125 PetriNetUnfolderBase]: For 265385/265385 co-relation queries the response was YES. [2024-06-21 18:25:30,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10215 conditions, 1400 events. 723/1400 cut-off events. For 265385/265385 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8638 event pairs, 75 based on Foata normal form. 2/1401 useless extension candidates. Maximal degree in co-relation 10023. Up to 1195 conditions per place. [2024-06-21 18:25:30,391 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 314 selfloop transitions, 49 changer transitions 0/366 dead transitions. [2024-06-21 18:25:30,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 366 transitions, 4435 flow [2024-06-21 18:25:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:25:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:25:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 18:25:30,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 18:25:30,393 INFO L175 Difference]: Start difference. First operand has 408 places, 354 transitions, 3655 flow. Second operand 10 states and 133 transitions. [2024-06-21 18:25:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 366 transitions, 4435 flow [2024-06-21 18:25:31,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 366 transitions, 4294 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:25:31,352 INFO L231 Difference]: Finished difference. Result has 412 places, 355 transitions, 3648 flow [2024-06-21 18:25:31,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3648, PETRI_PLACES=412, PETRI_TRANSITIONS=355} [2024-06-21 18:25:31,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-21 18:25:31,352 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 355 transitions, 3648 flow [2024-06-21 18:25:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:25:31,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:31,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:31,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:25:31,353 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:31,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1976907507, now seen corresponding path program 8 times [2024-06-21 18:25:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741307320] [2024-06-21 18:25:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:31,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:35,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741307320] [2024-06-21 18:25:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741307320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474366665] [2024-06-21 18:25:35,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:35,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:35,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:35,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:35,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 355 transitions, 3648 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:35,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:35,829 INFO L124 PetriNetUnfolderBase]: 734/1421 cut-off events. [2024-06-21 18:25:35,830 INFO L125 PetriNetUnfolderBase]: For 293069/293069 co-relation queries the response was YES. [2024-06-21 18:25:35,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10677 conditions, 1421 events. 734/1421 cut-off events. For 293069/293069 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8780 event pairs, 74 based on Foata normal form. 2/1422 useless extension candidates. Maximal degree in co-relation 10485. Up to 1077 conditions per place. [2024-06-21 18:25:35,848 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 279 selfloop transitions, 91 changer transitions 0/373 dead transitions. [2024-06-21 18:25:35,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 373 transitions, 4860 flow [2024-06-21 18:25:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 18:25:35,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2024-06-21 18:25:35,849 INFO L175 Difference]: Start difference. First operand has 412 places, 355 transitions, 3648 flow. Second operand 11 states and 151 transitions. [2024-06-21 18:25:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 373 transitions, 4860 flow [2024-06-21 18:25:36,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 373 transitions, 4713 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:25:36,989 INFO L231 Difference]: Finished difference. Result has 415 places, 360 transitions, 3835 flow [2024-06-21 18:25:36,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3835, PETRI_PLACES=415, PETRI_TRANSITIONS=360} [2024-06-21 18:25:36,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-21 18:25:36,989 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 360 transitions, 3835 flow [2024-06-21 18:25:36,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:36,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:36,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:36,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:25:36,990 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:36,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1976898207, now seen corresponding path program 9 times [2024-06-21 18:25:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:36,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458264797] [2024-06-21 18:25:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:39,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458264797] [2024-06-21 18:25:39,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458264797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:39,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405784134] [2024-06-21 18:25:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:40,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:40,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 360 transitions, 3835 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:40,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:40,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:40,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:40,618 INFO L124 PetriNetUnfolderBase]: 741/1434 cut-off events. [2024-06-21 18:25:40,618 INFO L125 PetriNetUnfolderBase]: For 297498/297498 co-relation queries the response was YES. [2024-06-21 18:25:40,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10863 conditions, 1434 events. 741/1434 cut-off events. For 297498/297498 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 8876 event pairs, 76 based on Foata normal form. 2/1435 useless extension candidates. Maximal degree in co-relation 10668. Up to 1108 conditions per place. [2024-06-21 18:25:40,638 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 279 selfloop transitions, 92 changer transitions 0/374 dead transitions. [2024-06-21 18:25:40,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 374 transitions, 4661 flow [2024-06-21 18:25:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 18:25:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 18:25:40,639 INFO L175 Difference]: Start difference. First operand has 415 places, 360 transitions, 3835 flow. Second operand 11 states and 149 transitions. [2024-06-21 18:25:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 374 transitions, 4661 flow [2024-06-21 18:25:41,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 374 transitions, 4443 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 18:25:41,725 INFO L231 Difference]: Finished difference. Result has 421 places, 363 transitions, 3867 flow [2024-06-21 18:25:41,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3631, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3867, PETRI_PLACES=421, PETRI_TRANSITIONS=363} [2024-06-21 18:25:41,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 391 predicate places. [2024-06-21 18:25:41,725 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 363 transitions, 3867 flow [2024-06-21 18:25:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:41,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:41,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:41,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 18:25:41,725 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:41,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:41,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1505728934, now seen corresponding path program 10 times [2024-06-21 18:25:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:41,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470707283] [2024-06-21 18:25:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:46,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470707283] [2024-06-21 18:25:46,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470707283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:46,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:46,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543818806] [2024-06-21 18:25:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:46,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:46,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 363 transitions, 3867 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:46,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:46,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:46,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:48,025 INFO L124 PetriNetUnfolderBase]: 744/1435 cut-off events. [2024-06-21 18:25:48,025 INFO L125 PetriNetUnfolderBase]: For 288528/288528 co-relation queries the response was YES. [2024-06-21 18:25:48,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 1435 events. 744/1435 cut-off events. For 288528/288528 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 8882 event pairs, 74 based on Foata normal form. 1/1435 useless extension candidates. Maximal degree in co-relation 10659. Up to 826 conditions per place. [2024-06-21 18:25:48,045 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 182 changer transitions 0/377 dead transitions. [2024-06-21 18:25:48,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 377 transitions, 5295 flow [2024-06-21 18:25:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-21 18:25:48,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:25:48,046 INFO L175 Difference]: Start difference. First operand has 421 places, 363 transitions, 3867 flow. Second operand 11 states and 155 transitions. [2024-06-21 18:25:48,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 377 transitions, 5295 flow [2024-06-21 18:25:49,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 377 transitions, 5095 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:25:49,237 INFO L231 Difference]: Finished difference. Result has 424 places, 365 transitions, 4070 flow [2024-06-21 18:25:49,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4070, PETRI_PLACES=424, PETRI_TRANSITIONS=365} [2024-06-21 18:25:49,237 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 394 predicate places. [2024-06-21 18:25:49,238 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 365 transitions, 4070 flow [2024-06-21 18:25:49,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:49,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:49,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:49,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 18:25:49,238 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:49,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash 19471818, now seen corresponding path program 11 times [2024-06-21 18:25:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:49,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356060840] [2024-06-21 18:25:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:51,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356060840] [2024-06-21 18:25:51,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356060840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:51,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:51,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:25:51,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705703210] [2024-06-21 18:25:51,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:51,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:25:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:25:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:25:51,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:25:51,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 365 transitions, 4070 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:51,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:51,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:25:51,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:52,430 INFO L124 PetriNetUnfolderBase]: 747/1440 cut-off events. [2024-06-21 18:25:52,430 INFO L125 PetriNetUnfolderBase]: For 292696/292696 co-relation queries the response was YES. [2024-06-21 18:25:52,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 1440 events. 747/1440 cut-off events. For 292696/292696 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 8935 event pairs, 74 based on Foata normal form. 1/1440 useless extension candidates. Maximal degree in co-relation 10896. Up to 1199 conditions per place. [2024-06-21 18:25:52,451 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 306 selfloop transitions, 68 changer transitions 0/378 dead transitions. [2024-06-21 18:25:52,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 378 transitions, 5200 flow [2024-06-21 18:25:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:25:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:25:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 18:25:52,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2024-06-21 18:25:52,452 INFO L175 Difference]: Start difference. First operand has 424 places, 365 transitions, 4070 flow. Second operand 10 states and 148 transitions. [2024-06-21 18:25:52,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 378 transitions, 5200 flow [2024-06-21 18:25:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 378 transitions, 4808 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:25:53,706 INFO L231 Difference]: Finished difference. Result has 425 places, 367 transitions, 3865 flow [2024-06-21 18:25:53,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3865, PETRI_PLACES=425, PETRI_TRANSITIONS=367} [2024-06-21 18:25:53,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 395 predicate places. [2024-06-21 18:25:53,707 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 367 transitions, 3865 flow [2024-06-21 18:25:53,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:53,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:53,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:53,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 18:25:53,708 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 19270008, now seen corresponding path program 12 times [2024-06-21 18:25:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538087854] [2024-06-21 18:25:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:25:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:25:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:25:56,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538087854] [2024-06-21 18:25:56,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538087854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:25:56,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:25:56,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:25:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354677196] [2024-06-21 18:25:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:25:56,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:25:56,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:25:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:25:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:25:56,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:25:56,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 367 transitions, 3865 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:25:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:25:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:25:57,728 INFO L124 PetriNetUnfolderBase]: 745/1441 cut-off events. [2024-06-21 18:25:57,728 INFO L125 PetriNetUnfolderBase]: For 282270/282270 co-relation queries the response was YES. [2024-06-21 18:25:57,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10668 conditions, 1441 events. 745/1441 cut-off events. For 282270/282270 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8935 event pairs, 78 based on Foata normal form. 1/1441 useless extension candidates. Maximal degree in co-relation 10470. Up to 1224 conditions per place. [2024-06-21 18:25:57,748 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 315 selfloop transitions, 59 changer transitions 0/377 dead transitions. [2024-06-21 18:25:57,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 377 transitions, 4635 flow [2024-06-21 18:25:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:25:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:25:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 18:25:57,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 18:25:57,749 INFO L175 Difference]: Start difference. First operand has 425 places, 367 transitions, 3865 flow. Second operand 11 states and 146 transitions. [2024-06-21 18:25:57,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 377 transitions, 4635 flow [2024-06-21 18:25:58,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 377 transitions, 4447 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:25:58,953 INFO L231 Difference]: Finished difference. Result has 428 places, 367 transitions, 3800 flow [2024-06-21 18:25:58,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3800, PETRI_PLACES=428, PETRI_TRANSITIONS=367} [2024-06-21 18:25:58,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2024-06-21 18:25:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 367 transitions, 3800 flow [2024-06-21 18:25:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:25:58,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:25:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:25:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 18:25:58,954 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:25:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:25:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -55903886, now seen corresponding path program 13 times [2024-06-21 18:25:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:25:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347637883] [2024-06-21 18:25:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:25:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:25:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347637883] [2024-06-21 18:26:02,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347637883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:02,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:02,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100650608] [2024-06-21 18:26:02,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:02,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:26:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 367 transitions, 3800 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:26:02,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:03,129 INFO L124 PetriNetUnfolderBase]: 743/1434 cut-off events. [2024-06-21 18:26:03,129 INFO L125 PetriNetUnfolderBase]: For 274084/274084 co-relation queries the response was YES. [2024-06-21 18:26:03,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10442 conditions, 1434 events. 743/1434 cut-off events. For 274084/274084 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8913 event pairs, 76 based on Foata normal form. 1/1434 useless extension candidates. Maximal degree in co-relation 10242. Up to 826 conditions per place. [2024-06-21 18:26:03,148 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 203 selfloop transitions, 174 changer transitions 0/380 dead transitions. [2024-06-21 18:26:03,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 380 transitions, 5219 flow [2024-06-21 18:26:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 18:26:03,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 18:26:03,150 INFO L175 Difference]: Start difference. First operand has 428 places, 367 transitions, 3800 flow. Second operand 11 states and 145 transitions. [2024-06-21 18:26:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 380 transitions, 5219 flow [2024-06-21 18:26:04,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 380 transitions, 5042 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 18:26:04,345 INFO L231 Difference]: Finished difference. Result has 428 places, 367 transitions, 3976 flow [2024-06-21 18:26:04,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3976, PETRI_PLACES=428, PETRI_TRANSITIONS=367} [2024-06-21 18:26:04,346 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2024-06-21 18:26:04,346 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 367 transitions, 3976 flow [2024-06-21 18:26:04,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:04,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:04,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:04,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 18:26:04,346 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:04,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:04,347 INFO L85 PathProgramCache]: Analyzing trace with hash -55896167, now seen corresponding path program 10 times [2024-06-21 18:26:04,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:04,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210080029] [2024-06-21 18:26:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210080029] [2024-06-21 18:26:07,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210080029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:07,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790061671] [2024-06-21 18:26:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:07,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:07,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 367 transitions, 3976 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:07,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:07,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:08,559 INFO L124 PetriNetUnfolderBase]: 747/1442 cut-off events. [2024-06-21 18:26:08,560 INFO L125 PetriNetUnfolderBase]: For 291114/291114 co-relation queries the response was YES. [2024-06-21 18:26:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10738 conditions, 1442 events. 747/1442 cut-off events. For 291114/291114 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 8970 event pairs, 74 based on Foata normal form. 2/1443 useless extension candidates. Maximal degree in co-relation 10537. Up to 1129 conditions per place. [2024-06-21 18:26:08,584 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 288 selfloop transitions, 89 changer transitions 0/380 dead transitions. [2024-06-21 18:26:08,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 380 transitions, 4787 flow [2024-06-21 18:26:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 18:26:08,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 18:26:08,585 INFO L175 Difference]: Start difference. First operand has 428 places, 367 transitions, 3976 flow. Second operand 11 states and 147 transitions. [2024-06-21 18:26:08,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 380 transitions, 4787 flow [2024-06-21 18:26:09,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 380 transitions, 4398 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 18:26:09,780 INFO L231 Difference]: Finished difference. Result has 428 places, 369 transitions, 3804 flow [2024-06-21 18:26:09,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3804, PETRI_PLACES=428, PETRI_TRANSITIONS=369} [2024-06-21 18:26:09,781 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2024-06-21 18:26:09,781 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 369 transitions, 3804 flow [2024-06-21 18:26:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 18:26:09,781 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:09,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1739750405, now seen corresponding path program 11 times [2024-06-21 18:26:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162361272] [2024-06-21 18:26:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162361272] [2024-06-21 18:26:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162361272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:12,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:12,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:12,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410968716] [2024-06-21 18:26:12,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:12,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:12,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:12,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:12,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 369 transitions, 3804 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:12,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:12,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:12,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:12,852 INFO L124 PetriNetUnfolderBase]: 751/1454 cut-off events. [2024-06-21 18:26:12,852 INFO L125 PetriNetUnfolderBase]: For 293806/293806 co-relation queries the response was YES. [2024-06-21 18:26:12,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10646 conditions, 1454 events. 751/1454 cut-off events. For 293806/293806 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9070 event pairs, 74 based on Foata normal form. 2/1455 useless extension candidates. Maximal degree in co-relation 10444. Up to 1222 conditions per place. [2024-06-21 18:26:12,872 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 316 selfloop transitions, 61 changer transitions 0/380 dead transitions. [2024-06-21 18:26:12,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 380 transitions, 4614 flow [2024-06-21 18:26:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:26:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:26:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 18:26:12,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 18:26:12,873 INFO L175 Difference]: Start difference. First operand has 428 places, 369 transitions, 3804 flow. Second operand 10 states and 137 transitions. [2024-06-21 18:26:12,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 380 transitions, 4614 flow [2024-06-21 18:26:14,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 380 transitions, 4423 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:26:14,018 INFO L231 Difference]: Finished difference. Result has 431 places, 370 transitions, 3775 flow [2024-06-21 18:26:14,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3775, PETRI_PLACES=431, PETRI_TRANSITIONS=370} [2024-06-21 18:26:14,018 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 401 predicate places. [2024-06-21 18:26:14,018 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 370 transitions, 3775 flow [2024-06-21 18:26:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:14,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:14,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:14,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 18:26:14,019 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:14,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1739758124, now seen corresponding path program 14 times [2024-06-21 18:26:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909633190] [2024-06-21 18:26:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:16,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909633190] [2024-06-21 18:26:16,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909633190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:16,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042615956] [2024-06-21 18:26:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:16,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:16,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:17,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:17,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 370 transitions, 3775 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:17,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:17,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:17,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:17,928 INFO L124 PetriNetUnfolderBase]: 754/1455 cut-off events. [2024-06-21 18:26:17,928 INFO L125 PetriNetUnfolderBase]: For 285215/285215 co-relation queries the response was YES. [2024-06-21 18:26:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10618 conditions, 1455 events. 754/1455 cut-off events. For 285215/285215 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9042 event pairs, 74 based on Foata normal form. 1/1455 useless extension candidates. Maximal degree in co-relation 10415. Up to 1156 conditions per place. [2024-06-21 18:26:17,948 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 293 selfloop transitions, 88 changer transitions 0/384 dead transitions. [2024-06-21 18:26:17,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 384 transitions, 5243 flow [2024-06-21 18:26:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-21 18:26:17,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:26:17,949 INFO L175 Difference]: Start difference. First operand has 431 places, 370 transitions, 3775 flow. Second operand 11 states and 155 transitions. [2024-06-21 18:26:17,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 384 transitions, 5243 flow [2024-06-21 18:26:19,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 384 transitions, 5091 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 18:26:19,240 INFO L231 Difference]: Finished difference. Result has 434 places, 372 transitions, 3840 flow [2024-06-21 18:26:19,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3840, PETRI_PLACES=434, PETRI_TRANSITIONS=372} [2024-06-21 18:26:19,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 404 predicate places. [2024-06-21 18:26:19,241 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 372 transitions, 3840 flow [2024-06-21 18:26:19,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:19,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:19,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 18:26:19,242 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:19,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -48746327, now seen corresponding path program 12 times [2024-06-21 18:26:19,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:19,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282941572] [2024-06-21 18:26:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:19,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:22,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:22,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282941572] [2024-06-21 18:26:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282941572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:22,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:22,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:22,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529640609] [2024-06-21 18:26:22,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:22,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:22,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:22,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:22,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 372 transitions, 3840 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:22,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:22,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:22,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:23,624 INFO L124 PetriNetUnfolderBase]: 751/1450 cut-off events. [2024-06-21 18:26:23,624 INFO L125 PetriNetUnfolderBase]: For 275388/275388 co-relation queries the response was YES. [2024-06-21 18:26:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 1450 events. 751/1450 cut-off events. For 275388/275388 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9037 event pairs, 73 based on Foata normal form. 2/1451 useless extension candidates. Maximal degree in co-relation 10076. Up to 1137 conditions per place. [2024-06-21 18:26:23,640 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 292 selfloop transitions, 88 changer transitions 0/383 dead transitions. [2024-06-21 18:26:23,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 383 transitions, 4624 flow [2024-06-21 18:26:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:26:23,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:26:23,641 INFO L175 Difference]: Start difference. First operand has 434 places, 372 transitions, 3840 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:26:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 383 transitions, 4624 flow [2024-06-21 18:26:24,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 383 transitions, 4413 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 18:26:24,905 INFO L231 Difference]: Finished difference. Result has 437 places, 372 transitions, 3809 flow [2024-06-21 18:26:24,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3809, PETRI_PLACES=437, PETRI_TRANSITIONS=372} [2024-06-21 18:26:24,905 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 407 predicate places. [2024-06-21 18:26:24,905 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 372 transitions, 3809 flow [2024-06-21 18:26:24,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:24,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:24,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 18:26:24,906 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:24,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -48754046, now seen corresponding path program 15 times [2024-06-21 18:26:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678787850] [2024-06-21 18:26:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:28,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:28,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678787850] [2024-06-21 18:26:28,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678787850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:28,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:28,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180088601] [2024-06-21 18:26:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:28,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:28,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:26:28,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 372 transitions, 3809 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:28,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:28,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:26:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:29,112 INFO L124 PetriNetUnfolderBase]: 749/1447 cut-off events. [2024-06-21 18:26:29,112 INFO L125 PetriNetUnfolderBase]: For 251659/251659 co-relation queries the response was YES. [2024-06-21 18:26:29,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10059 conditions, 1447 events. 749/1447 cut-off events. For 251659/251659 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 9030 event pairs, 73 based on Foata normal form. 1/1447 useless extension candidates. Maximal degree in co-relation 9854. Up to 839 conditions per place. [2024-06-21 18:26:29,133 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 207 selfloop transitions, 174 changer transitions 0/384 dead transitions. [2024-06-21 18:26:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 384 transitions, 5249 flow [2024-06-21 18:26:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 18:26:29,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 18:26:29,134 INFO L175 Difference]: Start difference. First operand has 437 places, 372 transitions, 3809 flow. Second operand 11 states and 146 transitions. [2024-06-21 18:26:29,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 384 transitions, 5249 flow [2024-06-21 18:26:30,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 384 transitions, 5015 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 18:26:30,189 INFO L231 Difference]: Finished difference. Result has 436 places, 372 transitions, 3928 flow [2024-06-21 18:26:30,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3928, PETRI_PLACES=436, PETRI_TRANSITIONS=372} [2024-06-21 18:26:30,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2024-06-21 18:26:30,189 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 372 transitions, 3928 flow [2024-06-21 18:26:30,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:30,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:30,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:30,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 18:26:30,190 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:30,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1739959934, now seen corresponding path program 16 times [2024-06-21 18:26:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399766304] [2024-06-21 18:26:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:33,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:33,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399766304] [2024-06-21 18:26:33,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399766304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:33,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:33,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651181556] [2024-06-21 18:26:33,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:33,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:33,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 372 transitions, 3928 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:33,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:33,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:33,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:34,612 INFO L124 PetriNetUnfolderBase]: 747/1444 cut-off events. [2024-06-21 18:26:34,612 INFO L125 PetriNetUnfolderBase]: For 241648/241648 co-relation queries the response was YES. [2024-06-21 18:26:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10027 conditions, 1444 events. 747/1444 cut-off events. For 241648/241648 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9011 event pairs, 73 based on Foata normal form. 1/1444 useless extension candidates. Maximal degree in co-relation 9821. Up to 1146 conditions per place. [2024-06-21 18:26:34,630 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 288 selfloop transitions, 93 changer transitions 0/384 dead transitions. [2024-06-21 18:26:34,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 384 transitions, 5372 flow [2024-06-21 18:26:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-21 18:26:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:26:34,631 INFO L175 Difference]: Start difference. First operand has 436 places, 372 transitions, 3928 flow. Second operand 11 states and 154 transitions. [2024-06-21 18:26:34,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 384 transitions, 5372 flow [2024-06-21 18:26:35,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 384 transitions, 4993 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 18:26:35,683 INFO L231 Difference]: Finished difference. Result has 437 places, 372 transitions, 3740 flow [2024-06-21 18:26:35,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3740, PETRI_PLACES=437, PETRI_TRANSITIONS=372} [2024-06-21 18:26:35,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 407 predicate places. [2024-06-21 18:26:35,683 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 372 transitions, 3740 flow [2024-06-21 18:26:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:35,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:35,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:35,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 18:26:35,684 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:35,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 220568787, now seen corresponding path program 13 times [2024-06-21 18:26:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241676594] [2024-06-21 18:26:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:37,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241676594] [2024-06-21 18:26:37,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241676594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:37,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:37,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:26:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106654894] [2024-06-21 18:26:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:26:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:26:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:26:38,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:38,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 372 transitions, 3740 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:26:38,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:38,763 INFO L124 PetriNetUnfolderBase]: 751/1452 cut-off events. [2024-06-21 18:26:38,763 INFO L125 PetriNetUnfolderBase]: For 258374/258374 co-relation queries the response was YES. [2024-06-21 18:26:38,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9933 conditions, 1452 events. 751/1452 cut-off events. For 258374/258374 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9059 event pairs, 73 based on Foata normal form. 2/1453 useless extension candidates. Maximal degree in co-relation 9726. Up to 1224 conditions per place. [2024-06-21 18:26:38,782 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 319 selfloop transitions, 62 changer transitions 0/384 dead transitions. [2024-06-21 18:26:38,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 384 transitions, 4562 flow [2024-06-21 18:26:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:26:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:26:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:26:38,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 18:26:38,783 INFO L175 Difference]: Start difference. First operand has 437 places, 372 transitions, 3740 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:26:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 384 transitions, 4562 flow [2024-06-21 18:26:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 384 transitions, 4355 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:26:39,858 INFO L231 Difference]: Finished difference. Result has 436 places, 373 transitions, 3699 flow [2024-06-21 18:26:39,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3699, PETRI_PLACES=436, PETRI_TRANSITIONS=373} [2024-06-21 18:26:39,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2024-06-21 18:26:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 373 transitions, 3699 flow [2024-06-21 18:26:39,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:26:39,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:39,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:39,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 18:26:39,859 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:39,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash 199415051, now seen corresponding path program 14 times [2024-06-21 18:26:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:39,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438446879] [2024-06-21 18:26:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438446879] [2024-06-21 18:26:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438446879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:43,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:43,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947799221] [2024-06-21 18:26:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:43,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:43,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:26:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 373 transitions, 3699 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:26:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:44,718 INFO L124 PetriNetUnfolderBase]: 755/1464 cut-off events. [2024-06-21 18:26:44,718 INFO L125 PetriNetUnfolderBase]: For 260950/260950 co-relation queries the response was YES. [2024-06-21 18:26:44,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 1464 events. 755/1464 cut-off events. For 260950/260950 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 9151 event pairs, 122 based on Foata normal form. 2/1465 useless extension candidates. Maximal degree in co-relation 9769. Up to 1325 conditions per place. [2024-06-21 18:26:44,738 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 355 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-21 18:26:44,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 385 transitions, 4525 flow [2024-06-21 18:26:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:26:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:26:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 18:26:44,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 18:26:44,740 INFO L175 Difference]: Start difference. First operand has 436 places, 373 transitions, 3699 flow. Second operand 12 states and 135 transitions. [2024-06-21 18:26:44,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 385 transitions, 4525 flow [2024-06-21 18:26:45,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 385 transitions, 4369 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:26:45,951 INFO L231 Difference]: Finished difference. Result has 440 places, 374 transitions, 3641 flow [2024-06-21 18:26:45,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3641, PETRI_PLACES=440, PETRI_TRANSITIONS=374} [2024-06-21 18:26:45,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 410 predicate places. [2024-06-21 18:26:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 374 transitions, 3641 flow [2024-06-21 18:26:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:26:45,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:45,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:45,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 18:26:45,951 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:45,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash 220568508, now seen corresponding path program 17 times [2024-06-21 18:26:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:45,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344415397] [2024-06-21 18:26:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:45,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:48,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344415397] [2024-06-21 18:26:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344415397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:48,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:48,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:48,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452641715] [2024-06-21 18:26:48,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:48,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:48,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:48,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 374 transitions, 3641 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:49,181 INFO L124 PetriNetUnfolderBase]: 758/1467 cut-off events. [2024-06-21 18:26:49,182 INFO L125 PetriNetUnfolderBase]: For 250662/250662 co-relation queries the response was YES. [2024-06-21 18:26:49,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9905 conditions, 1467 events. 758/1467 cut-off events. For 250662/250662 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 9210 event pairs, 73 based on Foata normal form. 1/1467 useless extension candidates. Maximal degree in co-relation 9696. Up to 1193 conditions per place. [2024-06-21 18:26:49,201 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 303 selfloop transitions, 82 changer transitions 0/388 dead transitions. [2024-06-21 18:26:49,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 388 transitions, 5143 flow [2024-06-21 18:26:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 18:26:49,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2024-06-21 18:26:49,202 INFO L175 Difference]: Start difference. First operand has 440 places, 374 transitions, 3641 flow. Second operand 11 states and 152 transitions. [2024-06-21 18:26:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 388 transitions, 5143 flow [2024-06-21 18:26:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 388 transitions, 5055 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 18:26:50,237 INFO L231 Difference]: Finished difference. Result has 441 places, 376 transitions, 3760 flow [2024-06-21 18:26:50,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3553, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3760, PETRI_PLACES=441, PETRI_TRANSITIONS=376} [2024-06-21 18:26:50,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 411 predicate places. [2024-06-21 18:26:50,238 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 376 transitions, 3760 flow [2024-06-21 18:26:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:50,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:50,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 18:26:50,239 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:50,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 292776780, now seen corresponding path program 18 times [2024-06-21 18:26:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:50,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729796566] [2024-06-21 18:26:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:53,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:53,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729796566] [2024-06-21 18:26:53,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729796566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:53,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:53,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:53,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309759470] [2024-06-21 18:26:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:53,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:53,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:53,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 376 transitions, 3760 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:53,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:53,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:53,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:54,207 INFO L124 PetriNetUnfolderBase]: 754/1465 cut-off events. [2024-06-21 18:26:54,207 INFO L125 PetriNetUnfolderBase]: For 237835/237835 co-relation queries the response was YES. [2024-06-21 18:26:54,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9592 conditions, 1465 events. 754/1465 cut-off events. For 237835/237835 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 9189 event pairs, 77 based on Foata normal form. 2/1466 useless extension candidates. Maximal degree in co-relation 9382. Up to 1162 conditions per place. [2024-06-21 18:26:54,228 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 289 selfloop transitions, 94 changer transitions 0/386 dead transitions. [2024-06-21 18:26:54,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 386 transitions, 4548 flow [2024-06-21 18:26:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 18:26:54,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2024-06-21 18:26:54,229 INFO L175 Difference]: Start difference. First operand has 441 places, 376 transitions, 3760 flow. Second operand 11 states and 151 transitions. [2024-06-21 18:26:54,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 386 transitions, 4548 flow [2024-06-21 18:26:55,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 386 transitions, 4294 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 18:26:55,173 INFO L231 Difference]: Finished difference. Result has 444 places, 376 transitions, 3710 flow [2024-06-21 18:26:55,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3710, PETRI_PLACES=444, PETRI_TRANSITIONS=376} [2024-06-21 18:26:55,174 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2024-06-21 18:26:55,174 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 376 transitions, 3710 flow [2024-06-21 18:26:55,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:55,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:26:55,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:26:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 18:26:55,174 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:26:55,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:26:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 293053269, now seen corresponding path program 15 times [2024-06-21 18:26:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:26:55,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963280632] [2024-06-21 18:26:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:26:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:26:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:26:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:26:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:26:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963280632] [2024-06-21 18:26:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963280632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:26:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:26:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:26:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410818565] [2024-06-21 18:26:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:26:58,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:26:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:26:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:26:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:26:58,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:26:58,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 376 transitions, 3710 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:26:58,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:26:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:26:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:26:59,456 INFO L124 PetriNetUnfolderBase]: 765/1482 cut-off events. [2024-06-21 18:26:59,456 INFO L125 PetriNetUnfolderBase]: For 274508/274508 co-relation queries the response was YES. [2024-06-21 18:26:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10152 conditions, 1482 events. 765/1482 cut-off events. For 274508/274508 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9329 event pairs, 76 based on Foata normal form. 2/1483 useless extension candidates. Maximal degree in co-relation 9940. Up to 1217 conditions per place. [2024-06-21 18:26:59,476 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 319 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-21 18:26:59,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 391 transitions, 4934 flow [2024-06-21 18:26:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:26:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:26:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 18:26:59,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 18:26:59,477 INFO L175 Difference]: Start difference. First operand has 444 places, 376 transitions, 3710 flow. Second operand 11 states and 147 transitions. [2024-06-21 18:26:59,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 391 transitions, 4934 flow [2024-06-21 18:27:00,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 391 transitions, 4716 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 18:27:00,505 INFO L231 Difference]: Finished difference. Result has 443 places, 378 transitions, 3720 flow [2024-06-21 18:27:00,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3720, PETRI_PLACES=443, PETRI_TRANSITIONS=378} [2024-06-21 18:27:00,506 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2024-06-21 18:27:00,506 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 378 transitions, 3720 flow [2024-06-21 18:27:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:00,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:00,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:00,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 18:27:00,506 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:00,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 293043969, now seen corresponding path program 16 times [2024-06-21 18:27:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:00,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331348781] [2024-06-21 18:27:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:00,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:03,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331348781] [2024-06-21 18:27:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331348781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:03,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:27:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368768277] [2024-06-21 18:27:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:27:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:27:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:27:03,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:27:03,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 378 transitions, 3720 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:03,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:03,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:27:03,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:04,593 INFO L124 PetriNetUnfolderBase]: 762/1477 cut-off events. [2024-06-21 18:27:04,594 INFO L125 PetriNetUnfolderBase]: For 242865/242865 co-relation queries the response was YES. [2024-06-21 18:27:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9700 conditions, 1477 events. 762/1477 cut-off events. For 242865/242865 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9313 event pairs, 77 based on Foata normal form. 2/1478 useless extension candidates. Maximal degree in co-relation 9489. Up to 1247 conditions per place. [2024-06-21 18:27:04,616 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 321 selfloop transitions, 65 changer transitions 0/389 dead transitions. [2024-06-21 18:27:04,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 389 transitions, 4516 flow [2024-06-21 18:27:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 18:27:04,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 18:27:04,617 INFO L175 Difference]: Start difference. First operand has 443 places, 378 transitions, 3720 flow. Second operand 11 states and 145 transitions. [2024-06-21 18:27:04,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 389 transitions, 4516 flow [2024-06-21 18:27:05,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 389 transitions, 4362 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 18:27:05,538 INFO L231 Difference]: Finished difference. Result has 447 places, 378 transitions, 3700 flow [2024-06-21 18:27:05,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3700, PETRI_PLACES=447, PETRI_TRANSITIONS=378} [2024-06-21 18:27:05,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 417 predicate places. [2024-06-21 18:27:05,539 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 378 transitions, 3700 flow [2024-06-21 18:27:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:05,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 18:27:05,539 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:05,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2068709119, now seen corresponding path program 17 times [2024-06-21 18:27:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:05,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508385345] [2024-06-21 18:27:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:08,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508385345] [2024-06-21 18:27:08,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508385345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:08,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:08,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984670271] [2024-06-21 18:27:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:08,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:08,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 378 transitions, 3700 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:08,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:09,595 INFO L124 PetriNetUnfolderBase]: 773/1502 cut-off events. [2024-06-21 18:27:09,595 INFO L125 PetriNetUnfolderBase]: For 273741/273741 co-relation queries the response was YES. [2024-06-21 18:27:09,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10259 conditions, 1502 events. 773/1502 cut-off events. For 273741/273741 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 9478 event pairs, 125 based on Foata normal form. 2/1503 useless extension candidates. Maximal degree in co-relation 10046. Up to 1347 conditions per place. [2024-06-21 18:27:09,615 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 366 selfloop transitions, 24 changer transitions 0/393 dead transitions. [2024-06-21 18:27:09,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 393 transitions, 4932 flow [2024-06-21 18:27:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 18:27:09,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 18:27:09,616 INFO L175 Difference]: Start difference. First operand has 447 places, 378 transitions, 3700 flow. Second operand 11 states and 129 transitions. [2024-06-21 18:27:09,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 393 transitions, 4932 flow [2024-06-21 18:27:10,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 393 transitions, 4788 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:27:10,706 INFO L231 Difference]: Finished difference. Result has 448 places, 380 transitions, 3694 flow [2024-06-21 18:27:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3694, PETRI_PLACES=448, PETRI_TRANSITIONS=380} [2024-06-21 18:27:10,706 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2024-06-21 18:27:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 380 transitions, 3694 flow [2024-06-21 18:27:10,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:10,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:10,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 18:27:10,707 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:10,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2069907711, now seen corresponding path program 18 times [2024-06-21 18:27:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827193340] [2024-06-21 18:27:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827193340] [2024-06-21 18:27:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827193340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834401051] [2024-06-21 18:27:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:14,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:14,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 380 transitions, 3694 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:14,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:14,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:14,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:14,787 INFO L124 PetriNetUnfolderBase]: 770/1493 cut-off events. [2024-06-21 18:27:14,788 INFO L125 PetriNetUnfolderBase]: For 248911/248911 co-relation queries the response was YES. [2024-06-21 18:27:14,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9791 conditions, 1493 events. 770/1493 cut-off events. For 248911/248911 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 9449 event pairs, 124 based on Foata normal form. 2/1494 useless extension candidates. Maximal degree in co-relation 9577. Up to 1365 conditions per place. [2024-06-21 18:27:14,805 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 366 selfloop transitions, 22 changer transitions 0/391 dead transitions. [2024-06-21 18:27:14,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 391 transitions, 4494 flow [2024-06-21 18:27:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 18:27:14,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 18:27:14,806 INFO L175 Difference]: Start difference. First operand has 448 places, 380 transitions, 3694 flow. Second operand 11 states and 127 transitions. [2024-06-21 18:27:14,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 391 transitions, 4494 flow [2024-06-21 18:27:15,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 391 transitions, 4388 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 18:27:15,842 INFO L231 Difference]: Finished difference. Result has 452 places, 380 transitions, 3636 flow [2024-06-21 18:27:15,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3636, PETRI_PLACES=452, PETRI_TRANSITIONS=380} [2024-06-21 18:27:15,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 422 predicate places. [2024-06-21 18:27:15,843 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 380 transitions, 3636 flow [2024-06-21 18:27:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:15,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:15,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 18:27:15,843 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:15,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2059781119, now seen corresponding path program 19 times [2024-06-21 18:27:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731932575] [2024-06-21 18:27:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:20,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:20,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731932575] [2024-06-21 18:27:20,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731932575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:20,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:20,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:27:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605248913] [2024-06-21 18:27:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:20,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:27:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:27:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:27:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:20,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 380 transitions, 3636 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:20,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:21,430 INFO L124 PetriNetUnfolderBase]: 774/1501 cut-off events. [2024-06-21 18:27:21,430 INFO L125 PetriNetUnfolderBase]: For 250867/250867 co-relation queries the response was YES. [2024-06-21 18:27:21,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9785 conditions, 1501 events. 774/1501 cut-off events. For 250867/250867 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 9481 event pairs, 126 based on Foata normal form. 2/1502 useless extension candidates. Maximal degree in co-relation 9569. Up to 1364 conditions per place. [2024-06-21 18:27:21,452 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 363 selfloop transitions, 27 changer transitions 0/393 dead transitions. [2024-06-21 18:27:21,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 393 transitions, 4486 flow [2024-06-21 18:27:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:27:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:27:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-21 18:27:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-06-21 18:27:21,453 INFO L175 Difference]: Start difference. First operand has 452 places, 380 transitions, 3636 flow. Second operand 13 states and 145 transitions. [2024-06-21 18:27:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 393 transitions, 4486 flow [2024-06-21 18:27:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 393 transitions, 4436 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:27:22,489 INFO L231 Difference]: Finished difference. Result has 455 places, 381 transitions, 3690 flow [2024-06-21 18:27:22,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3690, PETRI_PLACES=455, PETRI_TRANSITIONS=381} [2024-06-21 18:27:22,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2024-06-21 18:27:22,489 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 381 transitions, 3690 flow [2024-06-21 18:27:22,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:22,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:22,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 18:27:22,490 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:22,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2070174900, now seen corresponding path program 19 times [2024-06-21 18:27:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366730924] [2024-06-21 18:27:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:26,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:26,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366730924] [2024-06-21 18:27:26,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366730924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:26,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:26,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:27:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684175557] [2024-06-21 18:27:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:27:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:27:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:27:26,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:26,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 381 transitions, 3690 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:26,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:26,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:26,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:27,624 INFO L124 PetriNetUnfolderBase]: 772/1498 cut-off events. [2024-06-21 18:27:27,624 INFO L125 PetriNetUnfolderBase]: For 223948/223948 co-relation queries the response was YES. [2024-06-21 18:27:27,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9620 conditions, 1498 events. 772/1498 cut-off events. For 223948/223948 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 9491 event pairs, 126 based on Foata normal form. 1/1498 useless extension candidates. Maximal degree in co-relation 9403. Up to 1354 conditions per place. [2024-06-21 18:27:27,640 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 358 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-21 18:27:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 391 transitions, 4488 flow [2024-06-21 18:27:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:27:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:27:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 18:27:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:27:27,641 INFO L175 Difference]: Start difference. First operand has 455 places, 381 transitions, 3690 flow. Second operand 12 states and 136 transitions. [2024-06-21 18:27:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 391 transitions, 4488 flow [2024-06-21 18:27:28,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 391 transitions, 4372 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-21 18:27:28,657 INFO L231 Difference]: Finished difference. Result has 456 places, 381 transitions, 3639 flow [2024-06-21 18:27:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3639, PETRI_PLACES=456, PETRI_TRANSITIONS=381} [2024-06-21 18:27:28,657 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 18:27:28,657 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 381 transitions, 3639 flow [2024-06-21 18:27:28,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:28,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:28,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 18:27:28,658 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:28,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1745157291, now seen corresponding path program 20 times [2024-06-21 18:27:28,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:28,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542817947] [2024-06-21 18:27:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:28,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:31,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:31,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542817947] [2024-06-21 18:27:31,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542817947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:31,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:31,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:27:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169813549] [2024-06-21 18:27:31,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:27:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:31,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:27:31,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:27:31,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:31,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 381 transitions, 3639 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:31,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:31,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:31,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:32,735 INFO L124 PetriNetUnfolderBase]: 776/1506 cut-off events. [2024-06-21 18:27:32,735 INFO L125 PetriNetUnfolderBase]: For 241497/241497 co-relation queries the response was YES. [2024-06-21 18:27:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9645 conditions, 1506 events. 776/1506 cut-off events. For 241497/241497 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9516 event pairs, 124 based on Foata normal form. 2/1507 useless extension candidates. Maximal degree in co-relation 9427. Up to 1304 conditions per place. [2024-06-21 18:27:32,756 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 362 selfloop transitions, 32 changer transitions 0/397 dead transitions. [2024-06-21 18:27:32,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 397 transitions, 4853 flow [2024-06-21 18:27:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:27:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:27:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-21 18:27:32,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-21 18:27:32,764 INFO L175 Difference]: Start difference. First operand has 456 places, 381 transitions, 3639 flow. Second operand 13 states and 147 transitions. [2024-06-21 18:27:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 397 transitions, 4853 flow [2024-06-21 18:27:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 397 transitions, 4781 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 18:27:33,750 INFO L231 Difference]: Finished difference. Result has 458 places, 382 transitions, 3681 flow [2024-06-21 18:27:33,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3681, PETRI_PLACES=458, PETRI_TRANSITIONS=382} [2024-06-21 18:27:33,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2024-06-21 18:27:33,751 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 382 transitions, 3681 flow [2024-06-21 18:27:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-21 18:27:33,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:33,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:33,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 18:27:33,751 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:33,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1756199181, now seen corresponding path program 21 times [2024-06-21 18:27:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:33,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589165098] [2024-06-21 18:27:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589165098] [2024-06-21 18:27:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589165098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055527186] [2024-06-21 18:27:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:37,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:37,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:37,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 382 transitions, 3681 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:37,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:37,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:37,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:38,011 INFO L124 PetriNetUnfolderBase]: 773/1501 cut-off events. [2024-06-21 18:27:38,012 INFO L125 PetriNetUnfolderBase]: For 213826/213826 co-relation queries the response was YES. [2024-06-21 18:27:38,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9270 conditions, 1501 events. 773/1501 cut-off events. For 213826/213826 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9509 event pairs, 125 based on Foata normal form. 2/1502 useless extension candidates. Maximal degree in co-relation 9051. Up to 1350 conditions per place. [2024-06-21 18:27:38,032 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 364 selfloop transitions, 28 changer transitions 0/395 dead transitions. [2024-06-21 18:27:38,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 395 transitions, 4493 flow [2024-06-21 18:27:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:27:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:27:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 18:27:38,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 18:27:38,034 INFO L175 Difference]: Start difference. First operand has 458 places, 382 transitions, 3681 flow. Second operand 12 states and 140 transitions. [2024-06-21 18:27:38,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 395 transitions, 4493 flow [2024-06-21 18:27:38,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 395 transitions, 4218 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-06-21 18:27:38,866 INFO L231 Difference]: Finished difference. Result has 457 places, 382 transitions, 3466 flow [2024-06-21 18:27:38,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3466, PETRI_PLACES=457, PETRI_TRANSITIONS=382} [2024-06-21 18:27:38,866 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2024-06-21 18:27:38,866 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 382 transitions, 3466 flow [2024-06-21 18:27:38,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:27:38,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:38,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:38,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 18:27:38,867 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:38,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash 649842814, now seen corresponding path program 16 times [2024-06-21 18:27:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:38,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533126666] [2024-06-21 18:27:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:40,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533126666] [2024-06-21 18:27:40,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533126666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:40,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:40,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:27:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936184516] [2024-06-21 18:27:40,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:40,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:27:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:27:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:27:40,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:40,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 382 transitions, 3466 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:40,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:40,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:40,879 INFO L124 PetriNetUnfolderBase]: 777/1509 cut-off events. [2024-06-21 18:27:40,879 INFO L125 PetriNetUnfolderBase]: For 215192/215192 co-relation queries the response was YES. [2024-06-21 18:27:40,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8886 conditions, 1509 events. 777/1509 cut-off events. For 215192/215192 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9607 event pairs, 77 based on Foata normal form. 2/1510 useless extension candidates. Maximal degree in co-relation 8669. Up to 1337 conditions per place. [2024-06-21 18:27:40,900 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 371 selfloop transitions, 30 changer transitions 0/404 dead transitions. [2024-06-21 18:27:40,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 404 transitions, 4362 flow [2024-06-21 18:27:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:27:40,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:27:40,901 INFO L175 Difference]: Start difference. First operand has 457 places, 382 transitions, 3466 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:27:40,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 404 transitions, 4362 flow [2024-06-21 18:27:41,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 404 transitions, 4148 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-21 18:27:41,833 INFO L231 Difference]: Finished difference. Result has 453 places, 383 transitions, 3358 flow [2024-06-21 18:27:41,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3358, PETRI_PLACES=453, PETRI_TRANSITIONS=383} [2024-06-21 18:27:41,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2024-06-21 18:27:41,834 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 383 transitions, 3358 flow [2024-06-21 18:27:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:41,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:41,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:41,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 18:27:41,834 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:41,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:41,835 INFO L85 PathProgramCache]: Analyzing trace with hash -99710234, now seen corresponding path program 17 times [2024-06-21 18:27:41,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:41,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90847502] [2024-06-21 18:27:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:41,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90847502] [2024-06-21 18:27:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90847502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:43,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515189420] [2024-06-21 18:27:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:43,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:43,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 383 transitions, 3358 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:43,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:43,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:43,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:44,250 INFO L124 PetriNetUnfolderBase]: 784/1522 cut-off events. [2024-06-21 18:27:44,250 INFO L125 PetriNetUnfolderBase]: For 218173/218173 co-relation queries the response was YES. [2024-06-21 18:27:44,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8713 conditions, 1522 events. 784/1522 cut-off events. For 218173/218173 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 9676 event pairs, 87 based on Foata normal form. 2/1523 useless extension candidates. Maximal degree in co-relation 8499. Up to 1364 conditions per place. [2024-06-21 18:27:44,266 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 369 selfloop transitions, 32 changer transitions 0/404 dead transitions. [2024-06-21 18:27:44,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 404 transitions, 4264 flow [2024-06-21 18:27:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:27:44,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:27:44,267 INFO L175 Difference]: Start difference. First operand has 453 places, 383 transitions, 3358 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:27:44,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 404 transitions, 4264 flow [2024-06-21 18:27:45,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 404 transitions, 4170 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 18:27:45,151 INFO L231 Difference]: Finished difference. Result has 456 places, 386 transitions, 3399 flow [2024-06-21 18:27:45,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3399, PETRI_PLACES=456, PETRI_TRANSITIONS=386} [2024-06-21 18:27:45,152 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 18:27:45,152 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 386 transitions, 3399 flow [2024-06-21 18:27:45,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:45,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:45,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 18:27:45,152 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:45,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -91526234, now seen corresponding path program 18 times [2024-06-21 18:27:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703270851] [2024-06-21 18:27:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:46,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703270851] [2024-06-21 18:27:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703270851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:46,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:46,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:46,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333370973] [2024-06-21 18:27:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:46,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:46,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:46,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 386 transitions, 3399 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:46,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:46,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:46,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:47,378 INFO L124 PetriNetUnfolderBase]: 788/1530 cut-off events. [2024-06-21 18:27:47,378 INFO L125 PetriNetUnfolderBase]: For 220719/220719 co-relation queries the response was YES. [2024-06-21 18:27:47,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 1530 events. 788/1530 cut-off events. For 220719/220719 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 9742 event pairs, 88 based on Foata normal form. 2/1531 useless extension candidates. Maximal degree in co-relation 8559. Up to 1367 conditions per place. [2024-06-21 18:27:47,400 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 372 selfloop transitions, 31 changer transitions 0/406 dead transitions. [2024-06-21 18:27:47,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 406 transitions, 4295 flow [2024-06-21 18:27:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:27:47,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:27:47,401 INFO L175 Difference]: Start difference. First operand has 456 places, 386 transitions, 3399 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:27:47,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 406 transitions, 4295 flow [2024-06-21 18:27:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 406 transitions, 4198 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 18:27:48,322 INFO L231 Difference]: Finished difference. Result has 459 places, 387 transitions, 3412 flow [2024-06-21 18:27:48,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3412, PETRI_PLACES=459, PETRI_TRANSITIONS=387} [2024-06-21 18:27:48,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 429 predicate places. [2024-06-21 18:27:48,322 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 387 transitions, 3412 flow [2024-06-21 18:27:48,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:48,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:48,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:48,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 18:27:48,322 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:48,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:48,323 INFO L85 PathProgramCache]: Analyzing trace with hash 3009446, now seen corresponding path program 19 times [2024-06-21 18:27:48,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:48,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217634128] [2024-06-21 18:27:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:48,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:49,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:49,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217634128] [2024-06-21 18:27:49,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217634128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:49,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:49,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:27:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835445090] [2024-06-21 18:27:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:49,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:27:49,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:27:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:27:49,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:27:49,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 387 transitions, 3412 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:49,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:49,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:27:49,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:50,103 INFO L124 PetriNetUnfolderBase]: 728/1470 cut-off events. [2024-06-21 18:27:50,103 INFO L125 PetriNetUnfolderBase]: For 232643/232646 co-relation queries the response was YES. [2024-06-21 18:27:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 1470 events. 728/1470 cut-off events. For 232643/232646 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9696 event pairs, 42 based on Foata normal form. 4/1468 useless extension candidates. Maximal degree in co-relation 8102. Up to 952 conditions per place. [2024-06-21 18:27:50,123 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 231 selfloop transitions, 37 changer transitions 0/406 dead transitions. [2024-06-21 18:27:50,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 406 transitions, 4036 flow [2024-06-21 18:27:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:27:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:27:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:27:50,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 18:27:50,124 INFO L175 Difference]: Start difference. First operand has 459 places, 387 transitions, 3412 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:27:50,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 406 transitions, 4036 flow [2024-06-21 18:27:51,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 406 transitions, 3936 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 18:27:51,012 INFO L231 Difference]: Finished difference. Result has 460 places, 388 transitions, 3443 flow [2024-06-21 18:27:51,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3443, PETRI_PLACES=460, PETRI_TRANSITIONS=388} [2024-06-21 18:27:51,013 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 18:27:51,013 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 388 transitions, 3443 flow [2024-06-21 18:27:51,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:51,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:51,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:51,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 18:27:51,014 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:51,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1544271544, now seen corresponding path program 20 times [2024-06-21 18:27:51,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:51,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941676013] [2024-06-21 18:27:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941676013] [2024-06-21 18:27:52,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941676013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:52,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:52,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:27:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126057848] [2024-06-21 18:27:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:27:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:27:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:27:52,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:52,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 388 transitions, 3443 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:52,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:52,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:52,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:53,234 INFO L124 PetriNetUnfolderBase]: 796/1546 cut-off events. [2024-06-21 18:27:53,234 INFO L125 PetriNetUnfolderBase]: For 226167/226167 co-relation queries the response was YES. [2024-06-21 18:27:53,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 1546 events. 796/1546 cut-off events. For 226167/226167 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 9882 event pairs, 94 based on Foata normal form. 2/1547 useless extension candidates. Maximal degree in co-relation 8701. Up to 1374 conditions per place. [2024-06-21 18:27:53,256 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 378 selfloop transitions, 28 changer transitions 0/409 dead transitions. [2024-06-21 18:27:53,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 409 transitions, 4353 flow [2024-06-21 18:27:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:27:53,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:27:53,257 INFO L175 Difference]: Start difference. First operand has 460 places, 388 transitions, 3443 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:27:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 409 transitions, 4353 flow [2024-06-21 18:27:54,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 409 transitions, 4236 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:27:54,207 INFO L231 Difference]: Finished difference. Result has 463 places, 389 transitions, 3434 flow [2024-06-21 18:27:54,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3434, PETRI_PLACES=463, PETRI_TRANSITIONS=389} [2024-06-21 18:27:54,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 18:27:54,207 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 389 transitions, 3434 flow [2024-06-21 18:27:54,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:27:54,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:54,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:54,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 18:27:54,208 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:54,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1192935146, now seen corresponding path program 21 times [2024-06-21 18:27:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:54,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313861774] [2024-06-21 18:27:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:54,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:55,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:55,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313861774] [2024-06-21 18:27:55,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313861774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:55,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520476329] [2024-06-21 18:27:55,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:27:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:27:56,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 389 transitions, 3434 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:56,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:27:56,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:27:56,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:27:56,656 INFO L124 PetriNetUnfolderBase]: 800/1554 cut-off events. [2024-06-21 18:27:56,657 INFO L125 PetriNetUnfolderBase]: For 220967/220967 co-relation queries the response was YES. [2024-06-21 18:27:56,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8883 conditions, 1554 events. 800/1554 cut-off events. For 220967/220967 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 9919 event pairs, 98 based on Foata normal form. 2/1555 useless extension candidates. Maximal degree in co-relation 8664. Up to 1391 conditions per place. [2024-06-21 18:27:56,677 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 376 selfloop transitions, 29 changer transitions 0/408 dead transitions. [2024-06-21 18:27:56,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 408 transitions, 4332 flow [2024-06-21 18:27:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:27:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:27:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:27:56,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:27:56,678 INFO L175 Difference]: Start difference. First operand has 463 places, 389 transitions, 3434 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:27:56,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 408 transitions, 4332 flow [2024-06-21 18:27:57,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 408 transitions, 4240 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 18:27:57,694 INFO L231 Difference]: Finished difference. Result has 465 places, 390 transitions, 3448 flow [2024-06-21 18:27:57,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3448, PETRI_PLACES=465, PETRI_TRANSITIONS=390} [2024-06-21 18:27:57,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 435 predicate places. [2024-06-21 18:27:57,695 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 390 transitions, 3448 flow [2024-06-21 18:27:57,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:27:57,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:27:57,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:27:57,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 18:27:57,696 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:27:57,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:27:57,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1205595236, now seen corresponding path program 22 times [2024-06-21 18:27:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:27:57,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693209534] [2024-06-21 18:27:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:27:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:27:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:27:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:27:59,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:27:59,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693209534] [2024-06-21 18:27:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693209534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:27:59,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:27:59,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:27:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812163993] [2024-06-21 18:27:59,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:27:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:27:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:27:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:27:59,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:00,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:00,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 390 transitions, 3448 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:00,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:00,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:00,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:00,673 INFO L124 PetriNetUnfolderBase]: 804/1562 cut-off events. [2024-06-21 18:28:00,673 INFO L125 PetriNetUnfolderBase]: For 223874/223874 co-relation queries the response was YES. [2024-06-21 18:28:00,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8934 conditions, 1562 events. 804/1562 cut-off events. For 223874/223874 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 10015 event pairs, 103 based on Foata normal form. 2/1563 useless extension candidates. Maximal degree in co-relation 8714. Up to 1404 conditions per place. [2024-06-21 18:28:00,695 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 376 selfloop transitions, 30 changer transitions 0/409 dead transitions. [2024-06-21 18:28:00,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 409 transitions, 4357 flow [2024-06-21 18:28:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:00,696 INFO L175 Difference]: Start difference. First operand has 465 places, 390 transitions, 3448 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 409 transitions, 4357 flow [2024-06-21 18:28:01,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 409 transitions, 4261 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:01,681 INFO L231 Difference]: Finished difference. Result has 468 places, 392 transitions, 3476 flow [2024-06-21 18:28:01,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3476, PETRI_PLACES=468, PETRI_TRANSITIONS=392} [2024-06-21 18:28:01,681 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 438 predicate places. [2024-06-21 18:28:01,681 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 392 transitions, 3476 flow [2024-06-21 18:28:01,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:01,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:01,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 18:28:01,682 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:01,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash 97102650, now seen corresponding path program 23 times [2024-06-21 18:28:01,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:01,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933162567] [2024-06-21 18:28:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933162567] [2024-06-21 18:28:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933162567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:03,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19202633] [2024-06-21 18:28:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:03,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:03,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:03,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 392 transitions, 3476 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:03,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:03,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:03,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:04,411 INFO L124 PetriNetUnfolderBase]: 808/1569 cut-off events. [2024-06-21 18:28:04,411 INFO L125 PetriNetUnfolderBase]: For 226516/226516 co-relation queries the response was YES. [2024-06-21 18:28:04,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8991 conditions, 1569 events. 808/1569 cut-off events. For 226516/226516 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 10075 event pairs, 103 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 8769. Up to 1403 conditions per place. [2024-06-21 18:28:04,434 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 371 selfloop transitions, 35 changer transitions 0/409 dead transitions. [2024-06-21 18:28:04,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 409 transitions, 4374 flow [2024-06-21 18:28:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:04,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:04,435 INFO L175 Difference]: Start difference. First operand has 468 places, 392 transitions, 3476 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:04,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 409 transitions, 4374 flow [2024-06-21 18:28:05,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 409 transitions, 4273 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:05,335 INFO L231 Difference]: Finished difference. Result has 471 places, 393 transitions, 3497 flow [2024-06-21 18:28:05,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3497, PETRI_PLACES=471, PETRI_TRANSITIONS=393} [2024-06-21 18:28:05,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 441 predicate places. [2024-06-21 18:28:05,336 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 393 transitions, 3497 flow [2024-06-21 18:28:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:05,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:05,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:05,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 18:28:05,336 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:05,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1582468872, now seen corresponding path program 24 times [2024-06-21 18:28:05,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:05,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670390601] [2024-06-21 18:28:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:05,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:06,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670390601] [2024-06-21 18:28:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670390601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731041015] [2024-06-21 18:28:06,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:06,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:06,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:06,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 393 transitions, 3497 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:06,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:06,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:06,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:07,602 INFO L124 PetriNetUnfolderBase]: 812/1577 cut-off events. [2024-06-21 18:28:07,602 INFO L125 PetriNetUnfolderBase]: For 229283/229283 co-relation queries the response was YES. [2024-06-21 18:28:07,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9047 conditions, 1577 events. 812/1577 cut-off events. For 229283/229283 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10116 event pairs, 102 based on Foata normal form. 2/1578 useless extension candidates. Maximal degree in co-relation 8824. Up to 1406 conditions per place. [2024-06-21 18:28:07,623 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 374 selfloop transitions, 34 changer transitions 0/411 dead transitions. [2024-06-21 18:28:07,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 411 transitions, 4403 flow [2024-06-21 18:28:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:07,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:07,624 INFO L175 Difference]: Start difference. First operand has 471 places, 393 transitions, 3497 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:07,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 411 transitions, 4403 flow [2024-06-21 18:28:08,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 411 transitions, 4291 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:08,616 INFO L231 Difference]: Finished difference. Result has 473 places, 394 transitions, 3507 flow [2024-06-21 18:28:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3507, PETRI_PLACES=473, PETRI_TRANSITIONS=394} [2024-06-21 18:28:08,616 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 443 predicate places. [2024-06-21 18:28:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 394 transitions, 3507 flow [2024-06-21 18:28:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:08,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 18:28:08,617 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:08,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 490343850, now seen corresponding path program 25 times [2024-06-21 18:28:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598532888] [2024-06-21 18:28:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:10,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:10,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598532888] [2024-06-21 18:28:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598532888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:10,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:10,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41905191] [2024-06-21 18:28:10,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:10,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:10,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 394 transitions, 3507 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:10,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:10,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:10,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:11,291 INFO L124 PetriNetUnfolderBase]: 816/1585 cut-off events. [2024-06-21 18:28:11,291 INFO L125 PetriNetUnfolderBase]: For 232160/232160 co-relation queries the response was YES. [2024-06-21 18:28:11,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9096 conditions, 1585 events. 816/1585 cut-off events. For 232160/232160 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 10184 event pairs, 101 based on Foata normal form. 2/1586 useless extension candidates. Maximal degree in co-relation 8872. Up to 1407 conditions per place. [2024-06-21 18:28:11,314 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 366 selfloop transitions, 42 changer transitions 0/411 dead transitions. [2024-06-21 18:28:11,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 411 transitions, 4413 flow [2024-06-21 18:28:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:28:11,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:28:11,315 INFO L175 Difference]: Start difference. First operand has 473 places, 394 transitions, 3507 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:28:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 411 transitions, 4413 flow [2024-06-21 18:28:12,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 411 transitions, 4301 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:12,246 INFO L231 Difference]: Finished difference. Result has 475 places, 395 transitions, 3535 flow [2024-06-21 18:28:12,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3535, PETRI_PLACES=475, PETRI_TRANSITIONS=395} [2024-06-21 18:28:12,246 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 445 predicate places. [2024-06-21 18:28:12,247 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 395 transitions, 3535 flow [2024-06-21 18:28:12,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:12,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:12,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:12,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 18:28:12,247 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:12,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1378269418, now seen corresponding path program 26 times [2024-06-21 18:28:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:12,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393784327] [2024-06-21 18:28:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:14,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:14,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393784327] [2024-06-21 18:28:14,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393784327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:14,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:14,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:14,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326543383] [2024-06-21 18:28:14,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:14,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:14,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:14,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:14,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 395 transitions, 3535 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:14,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:14,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:14,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:14,887 INFO L124 PetriNetUnfolderBase]: 820/1593 cut-off events. [2024-06-21 18:28:14,887 INFO L125 PetriNetUnfolderBase]: For 234821/234821 co-relation queries the response was YES. [2024-06-21 18:28:14,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9161 conditions, 1593 events. 820/1593 cut-off events. For 234821/234821 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 10251 event pairs, 81 based on Foata normal form. 2/1594 useless extension candidates. Maximal degree in co-relation 8936. Up to 1436 conditions per place. [2024-06-21 18:28:14,910 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 381 selfloop transitions, 29 changer transitions 0/413 dead transitions. [2024-06-21 18:28:14,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 413 transitions, 4456 flow [2024-06-21 18:28:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:14,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:14,910 INFO L175 Difference]: Start difference. First operand has 475 places, 395 transitions, 3535 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:14,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 413 transitions, 4456 flow [2024-06-21 18:28:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 413 transitions, 4326 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:15,867 INFO L231 Difference]: Finished difference. Result has 478 places, 397 transitions, 3533 flow [2024-06-21 18:28:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3405, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3533, PETRI_PLACES=478, PETRI_TRANSITIONS=397} [2024-06-21 18:28:15,868 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 448 predicate places. [2024-06-21 18:28:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 397 transitions, 3533 flow [2024-06-21 18:28:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:15,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:15,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:15,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 18:28:15,868 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:15,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1378121548, now seen corresponding path program 27 times [2024-06-21 18:28:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314965364] [2024-06-21 18:28:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:17,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:17,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314965364] [2024-06-21 18:28:17,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314965364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:17,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:17,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117042707] [2024-06-21 18:28:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:17,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:17,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:17,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:17,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 397 transitions, 3533 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:17,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:17,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:17,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:18,361 INFO L124 PetriNetUnfolderBase]: 824/1601 cut-off events. [2024-06-21 18:28:18,361 INFO L125 PetriNetUnfolderBase]: For 237421/237421 co-relation queries the response was YES. [2024-06-21 18:28:18,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9190 conditions, 1601 events. 824/1601 cut-off events. For 237421/237421 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 10325 event pairs, 81 based on Foata normal form. 2/1602 useless extension candidates. Maximal degree in co-relation 8963. Up to 1439 conditions per place. [2024-06-21 18:28:18,379 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 384 selfloop transitions, 28 changer transitions 0/415 dead transitions. [2024-06-21 18:28:18,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 415 transitions, 4455 flow [2024-06-21 18:28:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:18,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:18,380 INFO L175 Difference]: Start difference. First operand has 478 places, 397 transitions, 3533 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:18,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 415 transitions, 4455 flow [2024-06-21 18:28:19,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 415 transitions, 4352 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:19,360 INFO L231 Difference]: Finished difference. Result has 481 places, 398 transitions, 3546 flow [2024-06-21 18:28:19,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3546, PETRI_PLACES=481, PETRI_TRANSITIONS=398} [2024-06-21 18:28:19,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 451 predicate places. [2024-06-21 18:28:19,361 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 398 transitions, 3546 flow [2024-06-21 18:28:19,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:19,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:19,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:19,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 18:28:19,362 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:19,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:19,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1289555788, now seen corresponding path program 28 times [2024-06-21 18:28:19,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:19,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513455395] [2024-06-21 18:28:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:19,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:20,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513455395] [2024-06-21 18:28:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513455395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:20,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:20,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:20,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157213974] [2024-06-21 18:28:20,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:20,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:21,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:21,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 398 transitions, 3546 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:21,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:21,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:21,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:21,624 INFO L124 PetriNetUnfolderBase]: 828/1609 cut-off events. [2024-06-21 18:28:21,624 INFO L125 PetriNetUnfolderBase]: For 240421/240421 co-relation queries the response was YES. [2024-06-21 18:28:21,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9241 conditions, 1609 events. 828/1609 cut-off events. For 240421/240421 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 10377 event pairs, 79 based on Foata normal form. 2/1610 useless extension candidates. Maximal degree in co-relation 9013. Up to 1438 conditions per place. [2024-06-21 18:28:21,647 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 388 selfloop transitions, 27 changer transitions 0/418 dead transitions. [2024-06-21 18:28:21,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 418 transitions, 4482 flow [2024-06-21 18:28:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:28:21,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:28:21,648 INFO L175 Difference]: Start difference. First operand has 481 places, 398 transitions, 3546 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:28:21,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 418 transitions, 4482 flow [2024-06-21 18:28:22,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 418 transitions, 4376 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:22,678 INFO L231 Difference]: Finished difference. Result has 483 places, 399 transitions, 3556 flow [2024-06-21 18:28:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3556, PETRI_PLACES=483, PETRI_TRANSITIONS=399} [2024-06-21 18:28:22,679 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 453 predicate places. [2024-06-21 18:28:22,679 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 399 transitions, 3556 flow [2024-06-21 18:28:22,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:22,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:22,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 18:28:22,679 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:22,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash 662690772, now seen corresponding path program 29 times [2024-06-21 18:28:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:22,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154407650] [2024-06-21 18:28:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:24,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:24,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154407650] [2024-06-21 18:28:24,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154407650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:24,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:24,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252351088] [2024-06-21 18:28:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:24,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:24,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 399 transitions, 3556 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:24,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:24,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:24,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:25,310 INFO L124 PetriNetUnfolderBase]: 832/1617 cut-off events. [2024-06-21 18:28:25,311 INFO L125 PetriNetUnfolderBase]: For 243553/243553 co-relation queries the response was YES. [2024-06-21 18:28:25,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9292 conditions, 1617 events. 832/1617 cut-off events. For 243553/243553 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 10423 event pairs, 83 based on Foata normal form. 2/1618 useless extension candidates. Maximal degree in co-relation 9063. Up to 1445 conditions per place. [2024-06-21 18:28:25,334 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 376 selfloop transitions, 36 changer transitions 0/415 dead transitions. [2024-06-21 18:28:25,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 415 transitions, 4476 flow [2024-06-21 18:28:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:28:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:28:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 18:28:25,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 18:28:25,336 INFO L175 Difference]: Start difference. First operand has 483 places, 399 transitions, 3556 flow. Second operand 10 states and 129 transitions. [2024-06-21 18:28:25,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 415 transitions, 4476 flow [2024-06-21 18:28:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 415 transitions, 4370 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:26,357 INFO L231 Difference]: Finished difference. Result has 484 places, 400 transitions, 3586 flow [2024-06-21 18:28:26,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3586, PETRI_PLACES=484, PETRI_TRANSITIONS=400} [2024-06-21 18:28:26,358 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 454 predicate places. [2024-06-21 18:28:26,358 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 400 transitions, 3586 flow [2024-06-21 18:28:26,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:26,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:26,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 18:28:26,359 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:26,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 985245600, now seen corresponding path program 30 times [2024-06-21 18:28:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:26,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564834261] [2024-06-21 18:28:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:28,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564834261] [2024-06-21 18:28:28,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564834261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:28,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:28,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828948432] [2024-06-21 18:28:28,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:28,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:28,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:28,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:28,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 400 transitions, 3586 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:28,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:28,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:28,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:29,518 INFO L124 PetriNetUnfolderBase]: 836/1625 cut-off events. [2024-06-21 18:28:29,518 INFO L125 PetriNetUnfolderBase]: For 246355/246355 co-relation queries the response was YES. [2024-06-21 18:28:29,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9357 conditions, 1625 events. 836/1625 cut-off events. For 246355/246355 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 10520 event pairs, 85 based on Foata normal form. 2/1626 useless extension candidates. Maximal degree in co-relation 9128. Up to 1462 conditions per place. [2024-06-21 18:28:29,543 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 381 selfloop transitions, 32 changer transitions 0/416 dead transitions. [2024-06-21 18:28:29,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 416 transitions, 4510 flow [2024-06-21 18:28:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:28:29,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:28:29,544 INFO L175 Difference]: Start difference. First operand has 484 places, 400 transitions, 3586 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:28:29,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 416 transitions, 4510 flow [2024-06-21 18:28:30,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 416 transitions, 4384 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:30,657 INFO L231 Difference]: Finished difference. Result has 487 places, 401 transitions, 3590 flow [2024-06-21 18:28:30,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3590, PETRI_PLACES=487, PETRI_TRANSITIONS=401} [2024-06-21 18:28:30,658 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 457 predicate places. [2024-06-21 18:28:30,658 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 401 transitions, 3590 flow [2024-06-21 18:28:30,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:30,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:30,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 18:28:30,658 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:30,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash 657180522, now seen corresponding path program 31 times [2024-06-21 18:28:30,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839189258] [2024-06-21 18:28:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:32,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839189258] [2024-06-21 18:28:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839189258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:32,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340816899] [2024-06-21 18:28:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:32,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:32,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 401 transitions, 3590 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:32,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:32,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:32,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:33,230 INFO L124 PetriNetUnfolderBase]: 840/1633 cut-off events. [2024-06-21 18:28:33,230 INFO L125 PetriNetUnfolderBase]: For 249287/249287 co-relation queries the response was YES. [2024-06-21 18:28:33,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9397 conditions, 1633 events. 840/1633 cut-off events. For 249287/249287 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 10596 event pairs, 83 based on Foata normal form. 2/1634 useless extension candidates. Maximal degree in co-relation 9166. Up to 1465 conditions per place. [2024-06-21 18:28:33,254 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 385 selfloop transitions, 30 changer transitions 0/418 dead transitions. [2024-06-21 18:28:33,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 418 transitions, 4522 flow [2024-06-21 18:28:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:28:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:28:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 18:28:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 18:28:33,255 INFO L175 Difference]: Start difference. First operand has 487 places, 401 transitions, 3590 flow. Second operand 10 states and 128 transitions. [2024-06-21 18:28:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 418 transitions, 4522 flow [2024-06-21 18:28:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 418 transitions, 4402 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:34,283 INFO L231 Difference]: Finished difference. Result has 488 places, 402 transitions, 3598 flow [2024-06-21 18:28:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3598, PETRI_PLACES=488, PETRI_TRANSITIONS=402} [2024-06-21 18:28:34,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 458 predicate places. [2024-06-21 18:28:34,284 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 402 transitions, 3598 flow [2024-06-21 18:28:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 18:28:34,284 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:34,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2042971424, now seen corresponding path program 32 times [2024-06-21 18:28:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:34,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75049087] [2024-06-21 18:28:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75049087] [2024-06-21 18:28:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75049087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:36,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142766066] [2024-06-21 18:28:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:36,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:36,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:36,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 402 transitions, 3598 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:36,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:36,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:37,203 INFO L124 PetriNetUnfolderBase]: 844/1641 cut-off events. [2024-06-21 18:28:37,203 INFO L125 PetriNetUnfolderBase]: For 252410/252410 co-relation queries the response was YES. [2024-06-21 18:28:37,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 1641 events. 844/1641 cut-off events. For 252410/252410 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 10624 event pairs, 89 based on Foata normal form. 2/1642 useless extension candidates. Maximal degree in co-relation 9214. Up to 1415 conditions per place. [2024-06-21 18:28:37,285 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 349 selfloop transitions, 65 changer transitions 0/417 dead transitions. [2024-06-21 18:28:37,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 417 transitions, 4524 flow [2024-06-21 18:28:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:28:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:28:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 18:28:37,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 18:28:37,287 INFO L175 Difference]: Start difference. First operand has 488 places, 402 transitions, 3598 flow. Second operand 10 states and 129 transitions. [2024-06-21 18:28:37,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 417 transitions, 4524 flow [2024-06-21 18:28:38,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 417 transitions, 4406 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:38,326 INFO L231 Difference]: Finished difference. Result has 490 places, 403 transitions, 3680 flow [2024-06-21 18:28:38,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3680, PETRI_PLACES=490, PETRI_TRANSITIONS=403} [2024-06-21 18:28:38,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 460 predicate places. [2024-06-21 18:28:38,327 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 403 transitions, 3680 flow [2024-06-21 18:28:38,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:38,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:38,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 18:28:38,327 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1849032014, now seen corresponding path program 33 times [2024-06-21 18:28:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:38,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758552011] [2024-06-21 18:28:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:40,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:40,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758552011] [2024-06-21 18:28:40,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758552011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:40,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:40,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864251694] [2024-06-21 18:28:40,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:40,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:40,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:40,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:40,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 403 transitions, 3680 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:40,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:40,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:40,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:41,151 INFO L124 PetriNetUnfolderBase]: 848/1649 cut-off events. [2024-06-21 18:28:41,151 INFO L125 PetriNetUnfolderBase]: For 255599/255599 co-relation queries the response was YES. [2024-06-21 18:28:41,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9563 conditions, 1649 events. 848/1649 cut-off events. For 255599/255599 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 10693 event pairs, 89 based on Foata normal form. 2/1650 useless extension candidates. Maximal degree in co-relation 9331. Up to 1459 conditions per place. [2024-06-21 18:28:41,176 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 369 selfloop transitions, 46 changer transitions 0/418 dead transitions. [2024-06-21 18:28:41,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 418 transitions, 4610 flow [2024-06-21 18:28:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 18:28:41,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 18:28:41,177 INFO L175 Difference]: Start difference. First operand has 490 places, 403 transitions, 3680 flow. Second operand 11 states and 136 transitions. [2024-06-21 18:28:41,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 418 transitions, 4610 flow [2024-06-21 18:28:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 418 transitions, 4420 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:42,224 INFO L231 Difference]: Finished difference. Result has 493 places, 404 transitions, 3654 flow [2024-06-21 18:28:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3654, PETRI_PLACES=493, PETRI_TRANSITIONS=404} [2024-06-21 18:28:42,224 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 463 predicate places. [2024-06-21 18:28:42,224 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 404 transitions, 3654 flow [2024-06-21 18:28:42,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:42,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:42,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 18:28:42,224 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:42,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1843669634, now seen corresponding path program 34 times [2024-06-21 18:28:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851087253] [2024-06-21 18:28:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851087253] [2024-06-21 18:28:44,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851087253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:44,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:44,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:28:44,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874349692] [2024-06-21 18:28:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:44,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:28:44,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:28:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:28:44,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:44,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 404 transitions, 3654 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:44,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:44,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:44,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:44,951 INFO L124 PetriNetUnfolderBase]: 852/1657 cut-off events. [2024-06-21 18:28:44,951 INFO L125 PetriNetUnfolderBase]: For 258331/258331 co-relation queries the response was YES. [2024-06-21 18:28:44,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 1657 events. 852/1657 cut-off events. For 258331/258331 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 10737 event pairs, 91 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 9339. Up to 1473 conditions per place. [2024-06-21 18:28:44,978 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 374 selfloop transitions, 42 changer transitions 0/419 dead transitions. [2024-06-21 18:28:44,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 419 transitions, 4588 flow [2024-06-21 18:28:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:28:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:28:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 18:28:44,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 18:28:44,979 INFO L175 Difference]: Start difference. First operand has 493 places, 404 transitions, 3654 flow. Second operand 10 states and 127 transitions. [2024-06-21 18:28:44,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 419 transitions, 4588 flow [2024-06-21 18:28:46,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 419 transitions, 4434 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 18:28:46,142 INFO L231 Difference]: Finished difference. Result has 494 places, 405 transitions, 3658 flow [2024-06-21 18:28:46,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3658, PETRI_PLACES=494, PETRI_TRANSITIONS=405} [2024-06-21 18:28:46,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 464 predicate places. [2024-06-21 18:28:46,142 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 405 transitions, 3658 flow [2024-06-21 18:28:46,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:46,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:46,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:46,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 18:28:46,142 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:46,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1843521764, now seen corresponding path program 35 times [2024-06-21 18:28:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:46,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530891719] [2024-06-21 18:28:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:46,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530891719] [2024-06-21 18:28:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530891719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:28:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919009710] [2024-06-21 18:28:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:28:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:28:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:28:48,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:28:48,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 405 transitions, 3658 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:48,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:28:48,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:48,719 INFO L124 PetriNetUnfolderBase]: 849/1652 cut-off events. [2024-06-21 18:28:48,719 INFO L125 PetriNetUnfolderBase]: For 222189/222189 co-relation queries the response was YES. [2024-06-21 18:28:48,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9001 conditions, 1652 events. 849/1652 cut-off events. For 222189/222189 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 10727 event pairs, 88 based on Foata normal form. 2/1653 useless extension candidates. Maximal degree in co-relation 8767. Up to 1463 conditions per place. [2024-06-21 18:28:48,743 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 375 selfloop transitions, 42 changer transitions 0/420 dead transitions. [2024-06-21 18:28:48,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 420 transitions, 4528 flow [2024-06-21 18:28:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:28:48,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:28:48,744 INFO L175 Difference]: Start difference. First operand has 494 places, 405 transitions, 3658 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:28:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 420 transitions, 4528 flow [2024-06-21 18:28:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 420 transitions, 4380 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 18:28:49,990 INFO L231 Difference]: Finished difference. Result has 497 places, 405 transitions, 3598 flow [2024-06-21 18:28:49,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3598, PETRI_PLACES=497, PETRI_TRANSITIONS=405} [2024-06-21 18:28:49,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 467 predicate places. [2024-06-21 18:28:49,991 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 405 transitions, 3598 flow [2024-06-21 18:28:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-21 18:28:49,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:49,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:49,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 18:28:49,991 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:49,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1071594710, now seen corresponding path program 1 times [2024-06-21 18:28:49,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:49,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769898524] [2024-06-21 18:28:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769898524] [2024-06-21 18:28:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769898524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:28:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41542940] [2024-06-21 18:28:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:28:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:28:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:28:54,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:28:54,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 405 transitions, 3598 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:54,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:54,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:28:54,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:54,940 INFO L124 PetriNetUnfolderBase]: 860/1674 cut-off events. [2024-06-21 18:28:54,940 INFO L125 PetriNetUnfolderBase]: For 264186/264186 co-relation queries the response was YES. [2024-06-21 18:28:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9536 conditions, 1674 events. 860/1674 cut-off events. For 264186/264186 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 10913 event pairs, 109 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 9300. Up to 1442 conditions per place. [2024-06-21 18:28:54,968 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 378 selfloop transitions, 45 changer transitions 1/427 dead transitions. [2024-06-21 18:28:54,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 427 transitions, 4979 flow [2024-06-21 18:28:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 18:28:54,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 18:28:54,969 INFO L175 Difference]: Start difference. First operand has 497 places, 405 transitions, 3598 flow. Second operand 11 states and 147 transitions. [2024-06-21 18:28:54,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 427 transitions, 4979 flow [2024-06-21 18:28:56,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 427 transitions, 4724 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 18:28:56,278 INFO L231 Difference]: Finished difference. Result has 499 places, 407 transitions, 3545 flow [2024-06-21 18:28:56,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3545, PETRI_PLACES=499, PETRI_TRANSITIONS=407} [2024-06-21 18:28:56,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 469 predicate places. [2024-06-21 18:28:56,278 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 407 transitions, 3545 flow [2024-06-21 18:28:56,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:56,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:56,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:56,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 18:28:56,279 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:28:56,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash -399388338, now seen corresponding path program 2 times [2024-06-21 18:28:56,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:56,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858514409] [2024-06-21 18:28:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:58,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:58,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858514409] [2024-06-21 18:28:58,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858514409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:58,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:58,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:28:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738566252] [2024-06-21 18:28:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:58,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:28:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:28:58,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:28:58,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:28:58,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 407 transitions, 3545 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:58,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:58,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:28:58,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:59,221 INFO L124 PetriNetUnfolderBase]: 846/1644 cut-off events. [2024-06-21 18:28:59,221 INFO L125 PetriNetUnfolderBase]: For 224170/224170 co-relation queries the response was YES. [2024-06-21 18:28:59,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8808 conditions, 1644 events. 846/1644 cut-off events. For 224170/224170 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 10683 event pairs, 112 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 8570. Up to 1459 conditions per place. [2024-06-21 18:28:59,247 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 377 selfloop transitions, 44 changer transitions 0/424 dead transitions. [2024-06-21 18:28:59,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 424 transitions, 4429 flow [2024-06-21 18:28:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:28:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:28:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 18:28:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:28:59,248 INFO L175 Difference]: Start difference. First operand has 499 places, 407 transitions, 3545 flow. Second operand 11 states and 143 transitions. [2024-06-21 18:28:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 424 transitions, 4429 flow [2024-06-21 18:29:00,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 424 transitions, 4287 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 18:29:00,353 INFO L231 Difference]: Finished difference. Result has 504 places, 407 transitions, 3495 flow [2024-06-21 18:29:00,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3495, PETRI_PLACES=504, PETRI_TRANSITIONS=407} [2024-06-21 18:29:00,353 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 474 predicate places. [2024-06-21 18:29:00,354 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 407 transitions, 3495 flow [2024-06-21 18:29:00,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:00,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:00,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:00,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 18:29:00,354 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:00,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1067010740, now seen corresponding path program 3 times [2024-06-21 18:29:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777466053] [2024-06-21 18:29:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777466053] [2024-06-21 18:29:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777466053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:29:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061071059] [2024-06-21 18:29:02,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:29:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:29:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:29:02,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:29:02,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 407 transitions, 3495 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:29:02,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:02,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:29:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:03,140 INFO L124 PetriNetUnfolderBase]: 850/1652 cut-off events. [2024-06-21 18:29:03,140 INFO L125 PetriNetUnfolderBase]: For 228175/228175 co-relation queries the response was YES. [2024-06-21 18:29:03,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8808 conditions, 1652 events. 850/1652 cut-off events. For 228175/228175 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 10753 event pairs, 85 based on Foata normal form. 2/1653 useless extension candidates. Maximal degree in co-relation 8568. Up to 1481 conditions per place. [2024-06-21 18:29:03,165 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 392 selfloop transitions, 29 changer transitions 0/424 dead transitions. [2024-06-21 18:29:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 424 transitions, 4425 flow [2024-06-21 18:29:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:29:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:29:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 18:29:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 18:29:03,166 INFO L175 Difference]: Start difference. First operand has 504 places, 407 transitions, 3495 flow. Second operand 12 states and 141 transitions. [2024-06-21 18:29:03,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 424 transitions, 4425 flow [2024-06-21 18:29:04,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 424 transitions, 4325 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 18:29:04,180 INFO L231 Difference]: Finished difference. Result has 506 places, 408 transitions, 3507 flow [2024-06-21 18:29:04,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3507, PETRI_PLACES=506, PETRI_TRANSITIONS=408} [2024-06-21 18:29:04,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 476 predicate places. [2024-06-21 18:29:04,181 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 408 transitions, 3507 flow [2024-06-21 18:29:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 18:29:04,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:04,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:04,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 18:29:04,181 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:04,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1274950586, now seen corresponding path program 4 times [2024-06-21 18:29:04,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:04,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740465029] [2024-06-21 18:29:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:06,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:06,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740465029] [2024-06-21 18:29:06,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740465029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:06,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:06,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:29:06,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358898739] [2024-06-21 18:29:06,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:29:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:29:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:29:06,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:06,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 408 transitions, 3507 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:06,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:06,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:06,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:06,978 INFO L124 PetriNetUnfolderBase]: 862/1680 cut-off events. [2024-06-21 18:29:06,979 INFO L125 PetriNetUnfolderBase]: For 342785/342785 co-relation queries the response was YES. [2024-06-21 18:29:07,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8956 conditions, 1680 events. 862/1680 cut-off events. For 342785/342785 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 10899 event pairs, 84 based on Foata normal form. 8/1687 useless extension candidates. Maximal degree in co-relation 8715. Up to 1351 conditions per place. [2024-06-21 18:29:07,005 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 373 selfloop transitions, 21 changer transitions 34/431 dead transitions. [2024-06-21 18:29:07,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 431 transitions, 4473 flow [2024-06-21 18:29:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:29:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:29:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 18:29:07,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 18:29:07,006 INFO L175 Difference]: Start difference. First operand has 506 places, 408 transitions, 3507 flow. Second operand 11 states and 145 transitions. [2024-06-21 18:29:07,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 431 transitions, 4473 flow [2024-06-21 18:29:08,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 431 transitions, 4371 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 18:29:08,229 INFO L231 Difference]: Finished difference. Result has 507 places, 387 transitions, 3264 flow [2024-06-21 18:29:08,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3405, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3264, PETRI_PLACES=507, PETRI_TRANSITIONS=387} [2024-06-21 18:29:08,230 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 477 predicate places. [2024-06-21 18:29:08,230 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 387 transitions, 3264 flow [2024-06-21 18:29:08,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:08,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:08,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:08,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 18:29:08,230 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:08,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash 197259384, now seen corresponding path program 5 times [2024-06-21 18:29:08,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:08,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583136151] [2024-06-21 18:29:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:08,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:10,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:10,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583136151] [2024-06-21 18:29:10,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583136151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:10,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:10,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:29:10,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766680120] [2024-06-21 18:29:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:29:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:29:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:29:10,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 387 transitions, 3264 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:10,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:10,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:10,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:11,053 INFO L124 PetriNetUnfolderBase]: 810/1585 cut-off events. [2024-06-21 18:29:11,053 INFO L125 PetriNetUnfolderBase]: For 533579/533579 co-relation queries the response was YES. [2024-06-21 18:29:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10583 conditions, 1585 events. 810/1585 cut-off events. For 533579/533579 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10120 event pairs, 92 based on Foata normal form. 8/1592 useless extension candidates. Maximal degree in co-relation 10355. Up to 1266 conditions per place. [2024-06-21 18:29:11,080 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 356 selfloop transitions, 39 changer transitions 11/409 dead transitions. [2024-06-21 18:29:11,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 409 transitions, 4652 flow [2024-06-21 18:29:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 18:29:11,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-06-21 18:29:11,081 INFO L175 Difference]: Start difference. First operand has 507 places, 387 transitions, 3264 flow. Second operand 10 states and 139 transitions. [2024-06-21 18:29:11,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 409 transitions, 4652 flow [2024-06-21 18:29:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 409 transitions, 4439 flow, removed 20 selfloop flow, removed 25 redundant places. [2024-06-21 18:29:12,622 INFO L231 Difference]: Finished difference. Result has 475 places, 381 transitions, 3112 flow [2024-06-21 18:29:12,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3112, PETRI_PLACES=475, PETRI_TRANSITIONS=381} [2024-06-21 18:29:12,622 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 445 predicate places. [2024-06-21 18:29:12,622 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 381 transitions, 3112 flow [2024-06-21 18:29:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:12,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:12,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:12,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 18:29:12,623 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:12,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash 197437014, now seen corresponding path program 6 times [2024-06-21 18:29:12,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:12,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676329335] [2024-06-21 18:29:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676329335] [2024-06-21 18:29:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676329335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:14,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:29:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776328943] [2024-06-21 18:29:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:29:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:29:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:29:14,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:14,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 381 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:14,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:14,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:14,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:15,407 INFO L124 PetriNetUnfolderBase]: 767/1504 cut-off events. [2024-06-21 18:29:15,407 INFO L125 PetriNetUnfolderBase]: For 360779/360779 co-relation queries the response was YES. [2024-06-21 18:29:15,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 1504 events. 767/1504 cut-off events. For 360779/360779 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9570 event pairs, 79 based on Foata normal form. 10/1513 useless extension candidates. Maximal degree in co-relation 7708. Up to 1266 conditions per place. [2024-06-21 18:29:15,428 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 344 selfloop transitions, 33 changer transitions 18/398 dead transitions. [2024-06-21 18:29:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 398 transitions, 4014 flow [2024-06-21 18:29:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 18:29:15,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 18:29:15,429 INFO L175 Difference]: Start difference. First operand has 475 places, 381 transitions, 3112 flow. Second operand 10 states and 133 transitions. [2024-06-21 18:29:15,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 398 transitions, 4014 flow [2024-06-21 18:29:16,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 398 transitions, 3931 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:29:16,273 INFO L231 Difference]: Finished difference. Result has 470 places, 371 transitions, 3031 flow [2024-06-21 18:29:16,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3031, PETRI_PLACES=470, PETRI_TRANSITIONS=371} [2024-06-21 18:29:16,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 440 predicate places. [2024-06-21 18:29:16,273 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 371 transitions, 3031 flow [2024-06-21 18:29:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:16,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:16,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:16,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 18:29:16,274 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:16,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash 192675414, now seen corresponding path program 7 times [2024-06-21 18:29:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922036645] [2024-06-21 18:29:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:18,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:18,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922036645] [2024-06-21 18:29:18,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922036645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:18,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:18,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:29:18,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954200046] [2024-06-21 18:29:18,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:18,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:29:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:29:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:29:18,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:18,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 371 transitions, 3031 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:18,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:18,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:18,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:18,986 INFO L124 PetriNetUnfolderBase]: 740/1451 cut-off events. [2024-06-21 18:29:18,986 INFO L125 PetriNetUnfolderBase]: For 211961/211961 co-relation queries the response was YES. [2024-06-21 18:29:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7666 conditions, 1451 events. 740/1451 cut-off events. For 211961/211961 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9170 event pairs, 64 based on Foata normal form. 2/1452 useless extension candidates. Maximal degree in co-relation 7454. Up to 1216 conditions per place. [2024-06-21 18:29:19,006 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 343 selfloop transitions, 41 changer transitions 0/387 dead transitions. [2024-06-21 18:29:19,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 387 transitions, 3883 flow [2024-06-21 18:29:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:29:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:29:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 18:29:19,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 18:29:19,007 INFO L175 Difference]: Start difference. First operand has 470 places, 371 transitions, 3031 flow. Second operand 11 states and 137 transitions. [2024-06-21 18:29:19,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 387 transitions, 3883 flow [2024-06-21 18:29:19,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 387 transitions, 3805 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 18:29:19,706 INFO L231 Difference]: Finished difference. Result has 460 places, 372 transitions, 3093 flow [2024-06-21 18:29:19,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3093, PETRI_PLACES=460, PETRI_TRANSITIONS=372} [2024-06-21 18:29:19,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 18:29:19,707 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 372 transitions, 3093 flow [2024-06-21 18:29:19,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:19,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:19,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:19,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 18:29:19,707 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:19,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 369926904, now seen corresponding path program 8 times [2024-06-21 18:29:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:19,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046603061] [2024-06-21 18:29:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:19,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:22,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:22,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046603061] [2024-06-21 18:29:22,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046603061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:22,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:22,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:29:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446385694] [2024-06-21 18:29:22,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:22,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:29:22,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:29:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:29:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:22,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 372 transitions, 3093 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:22,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:22,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:22,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:23,411 INFO L124 PetriNetUnfolderBase]: 756/1487 cut-off events. [2024-06-21 18:29:23,411 INFO L125 PetriNetUnfolderBase]: For 332595/332595 co-relation queries the response was YES. [2024-06-21 18:29:23,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 1487 events. 756/1487 cut-off events. For 332595/332595 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 9431 event pairs, 75 based on Foata normal form. 10/1496 useless extension candidates. Maximal degree in co-relation 7667. Up to 1204 conditions per place. [2024-06-21 18:29:23,432 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 321 selfloop transitions, 59 changer transitions 6/389 dead transitions. [2024-06-21 18:29:23,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 389 transitions, 3979 flow [2024-06-21 18:29:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:29:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:29:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 18:29:23,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 18:29:23,433 INFO L175 Difference]: Start difference. First operand has 460 places, 372 transitions, 3093 flow. Second operand 11 states and 145 transitions. [2024-06-21 18:29:23,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 389 transitions, 3979 flow [2024-06-21 18:29:24,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 389 transitions, 3853 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 18:29:24,171 INFO L231 Difference]: Finished difference. Result has 462 places, 370 transitions, 3123 flow [2024-06-21 18:29:24,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3123, PETRI_PLACES=462, PETRI_TRANSITIONS=370} [2024-06-21 18:29:24,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 18:29:24,172 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 370 transitions, 3123 flow [2024-06-21 18:29:24,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:24,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:24,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 18:29:24,172 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1474931336, now seen corresponding path program 9 times [2024-06-21 18:29:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312970012] [2024-06-21 18:29:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312970012] [2024-06-21 18:29:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312970012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:26,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:29:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766298367] [2024-06-21 18:29:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:29:26,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:29:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:29:26,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:29:26,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 370 transitions, 3123 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:26,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:26,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:29:26,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:27,562 INFO L124 PetriNetUnfolderBase]: 743/1454 cut-off events. [2024-06-21 18:29:27,563 INFO L125 PetriNetUnfolderBase]: For 204937/204937 co-relation queries the response was YES. [2024-06-21 18:29:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7808 conditions, 1454 events. 743/1454 cut-off events. For 204937/204937 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9229 event pairs, 71 based on Foata normal form. 2/1455 useless extension candidates. Maximal degree in co-relation 7600. Up to 1212 conditions per place. [2024-06-21 18:29:27,582 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 325 selfloop transitions, 55 changer transitions 0/384 dead transitions. [2024-06-21 18:29:27,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 384 transitions, 3967 flow [2024-06-21 18:29:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-21 18:29:27,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612903225806452 [2024-06-21 18:29:27,583 INFO L175 Difference]: Start difference. First operand has 462 places, 370 transitions, 3123 flow. Second operand 10 states and 143 transitions. [2024-06-21 18:29:27,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 384 transitions, 3967 flow [2024-06-21 18:29:28,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 384 transitions, 3801 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 18:29:28,316 INFO L231 Difference]: Finished difference. Result has 463 places, 371 transitions, 3127 flow [2024-06-21 18:29:28,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3127, PETRI_PLACES=463, PETRI_TRANSITIONS=371} [2024-06-21 18:29:28,316 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 18:29:28,316 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 371 transitions, 3127 flow [2024-06-21 18:29:28,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:28,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:28,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 18:29:28,317 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:28,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:28,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1107667514, now seen corresponding path program 10 times [2024-06-21 18:29:28,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:28,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725212681] [2024-06-21 18:29:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:28,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725212681] [2024-06-21 18:29:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725212681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:30,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:29:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484010635] [2024-06-21 18:29:30,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:29:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:29:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:29:30,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:30,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 371 transitions, 3127 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:30,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:30,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:30,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:31,267 INFO L124 PetriNetUnfolderBase]: 747/1466 cut-off events. [2024-06-21 18:29:31,267 INFO L125 PetriNetUnfolderBase]: For 207337/207337 co-relation queries the response was YES. [2024-06-21 18:29:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7853 conditions, 1466 events. 747/1466 cut-off events. For 207337/207337 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 9284 event pairs, 70 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 7644. Up to 1180 conditions per place. [2024-06-21 18:29:31,288 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 326 selfloop transitions, 57 changer transitions 0/386 dead transitions. [2024-06-21 18:29:31,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 386 transitions, 3981 flow [2024-06-21 18:29:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 18:29:31,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:29:31,289 INFO L175 Difference]: Start difference. First operand has 463 places, 371 transitions, 3127 flow. Second operand 10 states and 135 transitions. [2024-06-21 18:29:31,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 386 transitions, 3981 flow [2024-06-21 18:29:32,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 386 transitions, 3821 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:29:32,053 INFO L231 Difference]: Finished difference. Result has 465 places, 372 transitions, 3145 flow [2024-06-21 18:29:32,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3145, PETRI_PLACES=465, PETRI_TRANSITIONS=372} [2024-06-21 18:29:32,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 435 predicate places. [2024-06-21 18:29:32,054 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 372 transitions, 3145 flow [2024-06-21 18:29:32,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:32,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:32,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 18:29:32,054 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:32,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1100987820, now seen corresponding path program 1 times [2024-06-21 18:29:32,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:32,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177190558] [2024-06-21 18:29:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:32,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177190558] [2024-06-21 18:29:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177190558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:34,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:34,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:29:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610875285] [2024-06-21 18:29:34,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:34,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:29:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:29:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:29:34,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:34,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 372 transitions, 3145 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:34,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:34,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:34,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:35,382 INFO L124 PetriNetUnfolderBase]: 777/1532 cut-off events. [2024-06-21 18:29:35,382 INFO L125 PetriNetUnfolderBase]: For 411527/411527 co-relation queries the response was YES. [2024-06-21 18:29:35,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9512 conditions, 1532 events. 777/1532 cut-off events. For 411527/411527 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 9801 event pairs, 83 based on Foata normal form. 6/1537 useless extension candidates. Maximal degree in co-relation 9302. Up to 1208 conditions per place. [2024-06-21 18:29:35,398 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 326 selfloop transitions, 57 changer transitions 7/393 dead transitions. [2024-06-21 18:29:35,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 393 transitions, 4385 flow [2024-06-21 18:29:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:29:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:29:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 18:29:35,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:29:35,399 INFO L175 Difference]: Start difference. First operand has 465 places, 372 transitions, 3145 flow. Second operand 12 states and 156 transitions. [2024-06-21 18:29:35,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 393 transitions, 4385 flow [2024-06-21 18:29:36,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 393 transitions, 4221 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 18:29:36,519 INFO L231 Difference]: Finished difference. Result has 469 places, 369 transitions, 3073 flow [2024-06-21 18:29:36,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3073, PETRI_PLACES=469, PETRI_TRANSITIONS=369} [2024-06-21 18:29:36,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 439 predicate places. [2024-06-21 18:29:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 369 transitions, 3073 flow [2024-06-21 18:29:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:36,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:36,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:36,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 18:29:36,520 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:36,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1101226830, now seen corresponding path program 2 times [2024-06-21 18:29:36,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:36,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442200311] [2024-06-21 18:29:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:36,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:40,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:40,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442200311] [2024-06-21 18:29:40,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442200311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:40,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:40,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:29:40,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965301594] [2024-06-21 18:29:40,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:40,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:29:40,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:40,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:29:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:29:40,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:40,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 369 transitions, 3073 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:40,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:40,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:41,386 INFO L124 PetriNetUnfolderBase]: 774/1523 cut-off events. [2024-06-21 18:29:41,387 INFO L125 PetriNetUnfolderBase]: For 446936/446936 co-relation queries the response was YES. [2024-06-21 18:29:41,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9400 conditions, 1523 events. 774/1523 cut-off events. For 446936/446936 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9726 event pairs, 87 based on Foata normal form. 8/1530 useless extension candidates. Maximal degree in co-relation 9189. Up to 1258 conditions per place. [2024-06-21 18:29:41,408 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 320 selfloop transitions, 54 changer transitions 9/386 dead transitions. [2024-06-21 18:29:41,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 386 transitions, 3903 flow [2024-06-21 18:29:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:29:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:29:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-21 18:29:41,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-06-21 18:29:41,409 INFO L175 Difference]: Start difference. First operand has 469 places, 369 transitions, 3073 flow. Second operand 12 states and 154 transitions. [2024-06-21 18:29:41,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 386 transitions, 3903 flow [2024-06-21 18:29:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 386 transitions, 3778 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 18:29:42,798 INFO L231 Difference]: Finished difference. Result has 465 places, 366 transitions, 3037 flow [2024-06-21 18:29:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3037, PETRI_PLACES=465, PETRI_TRANSITIONS=366} [2024-06-21 18:29:42,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 435 predicate places. [2024-06-21 18:29:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 366 transitions, 3037 flow [2024-06-21 18:29:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:42,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 18:29:42,799 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 363677738, now seen corresponding path program 3 times [2024-06-21 18:29:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858114754] [2024-06-21 18:29:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:46,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:46,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858114754] [2024-06-21 18:29:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858114754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:46,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:29:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25608240] [2024-06-21 18:29:46,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:46,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:29:46,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:29:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:29:46,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:46,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 366 transitions, 3037 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:46,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:46,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:46,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:47,801 INFO L124 PetriNetUnfolderBase]: 747/1470 cut-off events. [2024-06-21 18:29:47,801 INFO L125 PetriNetUnfolderBase]: For 304236/304236 co-relation queries the response was YES. [2024-06-21 18:29:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7677 conditions, 1470 events. 747/1470 cut-off events. For 304236/304236 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9345 event pairs, 75 based on Foata normal form. 8/1477 useless extension candidates. Maximal degree in co-relation 7469. Up to 1208 conditions per place. [2024-06-21 18:29:47,821 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 323 selfloop transitions, 48 changer transitions 9/383 dead transitions. [2024-06-21 18:29:47,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 383 transitions, 3861 flow [2024-06-21 18:29:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:29:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:29:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 18:29:47,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:29:47,837 INFO L175 Difference]: Start difference. First operand has 465 places, 366 transitions, 3037 flow. Second operand 12 states and 152 transitions. [2024-06-21 18:29:47,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 383 transitions, 3861 flow [2024-06-21 18:29:48,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 383 transitions, 3749 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:29:48,571 INFO L231 Difference]: Finished difference. Result has 463 places, 363 transitions, 3002 flow [2024-06-21 18:29:48,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=451, 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=12, PETRI_FLOW=3002, PETRI_PLACES=463, PETRI_TRANSITIONS=363} [2024-06-21 18:29:48,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 18:29:48,571 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 363 transitions, 3002 flow [2024-06-21 18:29:48,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:48,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:48,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:48,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 18:29:48,572 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:48,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 874909372, now seen corresponding path program 11 times [2024-06-21 18:29:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:48,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480006387] [2024-06-21 18:29:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480006387] [2024-06-21 18:29:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480006387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:51,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:29:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722614565] [2024-06-21 18:29:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:51,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:29:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:29:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:29:51,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 363 transitions, 3002 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:51,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:51,825 INFO L124 PetriNetUnfolderBase]: 734/1444 cut-off events. [2024-06-21 18:29:51,826 INFO L125 PetriNetUnfolderBase]: For 204133/204133 co-relation queries the response was YES. [2024-06-21 18:29:51,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7641 conditions, 1444 events. 734/1444 cut-off events. For 204133/204133 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9171 event pairs, 65 based on Foata normal form. 2/1445 useless extension candidates. Maximal degree in co-relation 7434. Up to 1070 conditions per place. [2024-06-21 18:29:51,842 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 275 selfloop transitions, 97 changer transitions 0/375 dead transitions. [2024-06-21 18:29:51,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 375 transitions, 3828 flow [2024-06-21 18:29:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:29:51,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 18:29:51,843 INFO L175 Difference]: Start difference. First operand has 463 places, 363 transitions, 3002 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:29:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 375 transitions, 3828 flow [2024-06-21 18:29:52,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 375 transitions, 3728 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:29:52,588 INFO L231 Difference]: Finished difference. Result has 458 places, 364 transitions, 3160 flow [2024-06-21 18:29:52,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3160, PETRI_PLACES=458, PETRI_TRANSITIONS=364} [2024-06-21 18:29:52,589 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2024-06-21 18:29:52,589 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 364 transitions, 3160 flow [2024-06-21 18:29:52,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:52,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:52,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:52,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 18:29:52,589 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:52,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash 874904722, now seen corresponding path program 12 times [2024-06-21 18:29:52,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:52,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199152784] [2024-06-21 18:29:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:55,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:55,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199152784] [2024-06-21 18:29:55,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199152784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:55,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:55,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:29:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655171114] [2024-06-21 18:29:55,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:55,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:29:55,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:55,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:29:55,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:29:55,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:55,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 364 transitions, 3160 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:55,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:55,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:55,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:55,794 INFO L124 PetriNetUnfolderBase]: 767/1511 cut-off events. [2024-06-21 18:29:55,794 INFO L125 PetriNetUnfolderBase]: For 368982/368982 co-relation queries the response was YES. [2024-06-21 18:29:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10061 conditions, 1511 events. 767/1511 cut-off events. For 368982/368982 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 9642 event pairs, 76 based on Foata normal form. 2/1512 useless extension candidates. Maximal degree in co-relation 9855. Up to 1048 conditions per place. [2024-06-21 18:29:55,815 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 280 selfloop transitions, 99 changer transitions 0/382 dead transitions. [2024-06-21 18:29:55,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 382 transitions, 4462 flow [2024-06-21 18:29:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:29:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:29:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-21 18:29:55,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612903225806452 [2024-06-21 18:29:55,816 INFO L175 Difference]: Start difference. First operand has 458 places, 364 transitions, 3160 flow. Second operand 10 states and 143 transitions. [2024-06-21 18:29:55,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 382 transitions, 4462 flow [2024-06-21 18:29:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 382 transitions, 4214 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 18:29:57,161 INFO L231 Difference]: Finished difference. Result has 460 places, 366 transitions, 3237 flow [2024-06-21 18:29:57,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3237, PETRI_PLACES=460, PETRI_TRANSITIONS=366} [2024-06-21 18:29:57,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 18:29:57,161 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 366 transitions, 3237 flow [2024-06-21 18:29:57,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:57,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:57,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:57,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 18:29:57,162 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:29:57,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash 881338462, now seen corresponding path program 13 times [2024-06-21 18:29:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:57,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604310256] [2024-06-21 18:29:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:59,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604310256] [2024-06-21 18:29:59,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604310256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:59,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:59,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:29:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864367713] [2024-06-21 18:29:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:59,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:29:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:29:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:29:59,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:29:59,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 366 transitions, 3237 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:29:59,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:59,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:29:59,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:00,195 INFO L124 PetriNetUnfolderBase]: 783/1547 cut-off events. [2024-06-21 18:30:00,195 INFO L125 PetriNetUnfolderBase]: For 505028/505028 co-relation queries the response was YES. [2024-06-21 18:30:00,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10240 conditions, 1547 events. 783/1547 cut-off events. For 505028/505028 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 9928 event pairs, 82 based on Foata normal form. 10/1556 useless extension candidates. Maximal degree in co-relation 10033. Up to 1141 conditions per place. [2024-06-21 18:30:00,217 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 283 selfloop transitions, 89 changer transitions 6/381 dead transitions. [2024-06-21 18:30:00,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 381 transitions, 4111 flow [2024-06-21 18:30:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 18:30:00,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-06-21 18:30:00,218 INFO L175 Difference]: Start difference. First operand has 460 places, 366 transitions, 3237 flow. Second operand 10 states and 142 transitions. [2024-06-21 18:30:00,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 381 transitions, 4111 flow [2024-06-21 18:30:01,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 381 transitions, 3844 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 18:30:01,757 INFO L231 Difference]: Finished difference. Result has 463 places, 364 transitions, 3194 flow [2024-06-21 18:30:01,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3194, PETRI_PLACES=463, PETRI_TRANSITIONS=364} [2024-06-21 18:30:01,757 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 18:30:01,758 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 364 transitions, 3194 flow [2024-06-21 18:30:01,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:30:01,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:01,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 18:30:01,758 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:01,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1008305842, now seen corresponding path program 14 times [2024-06-21 18:30:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844516874] [2024-06-21 18:30:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844516874] [2024-06-21 18:30:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844516874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121438860] [2024-06-21 18:30:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:04,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:04,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:04,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 364 transitions, 3194 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:04,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:04,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:04,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:05,156 INFO L124 PetriNetUnfolderBase]: 782/1550 cut-off events. [2024-06-21 18:30:05,156 INFO L125 PetriNetUnfolderBase]: For 510366/510366 co-relation queries the response was YES. [2024-06-21 18:30:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10185 conditions, 1550 events. 782/1550 cut-off events. For 510366/510366 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 9979 event pairs, 86 based on Foata normal form. 10/1559 useless extension candidates. Maximal degree in co-relation 9977. Up to 1302 conditions per place. [2024-06-21 18:30:05,179 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 321 selfloop transitions, 42 changer transitions 13/379 dead transitions. [2024-06-21 18:30:05,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 379 transitions, 4062 flow [2024-06-21 18:30:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:30:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:30:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 18:30:05,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 18:30:05,180 INFO L175 Difference]: Start difference. First operand has 463 places, 364 transitions, 3194 flow. Second operand 11 states and 141 transitions. [2024-06-21 18:30:05,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 379 transitions, 4062 flow [2024-06-21 18:30:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 379 transitions, 3844 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 18:30:06,524 INFO L231 Difference]: Finished difference. Result has 466 places, 358 transitions, 3020 flow [2024-06-21 18:30:06,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3020, PETRI_PLACES=466, PETRI_TRANSITIONS=358} [2024-06-21 18:30:06,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 436 predicate places. [2024-06-21 18:30:06,525 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 358 transitions, 3020 flow [2024-06-21 18:30:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:06,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:06,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:06,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 18:30:06,525 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:06,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1102983502, now seen corresponding path program 15 times [2024-06-21 18:30:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:06,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708699994] [2024-06-21 18:30:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:06,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708699994] [2024-06-21 18:30:08,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708699994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:08,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:08,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:30:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756179019] [2024-06-21 18:30:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:30:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:30:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:30:08,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:08,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 358 transitions, 3020 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:30:08,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:08,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:08,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:09,608 INFO L124 PetriNetUnfolderBase]: 743/1473 cut-off events. [2024-06-21 18:30:09,608 INFO L125 PetriNetUnfolderBase]: For 342891/342891 co-relation queries the response was YES. [2024-06-21 18:30:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7749 conditions, 1473 events. 743/1473 cut-off events. For 342891/342891 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9447 event pairs, 69 based on Foata normal form. 10/1482 useless extension candidates. Maximal degree in co-relation 7540. Up to 1080 conditions per place. [2024-06-21 18:30:09,628 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 264 selfloop transitions, 98 changer transitions 7/372 dead transitions. [2024-06-21 18:30:09,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 372 transitions, 3814 flow [2024-06-21 18:30:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 18:30:09,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 18:30:09,629 INFO L175 Difference]: Start difference. First operand has 466 places, 358 transitions, 3020 flow. Second operand 10 states and 140 transitions. [2024-06-21 18:30:09,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 372 transitions, 3814 flow [2024-06-21 18:30:10,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 372 transitions, 3687 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-21 18:30:10,366 INFO L231 Difference]: Finished difference. Result has 462 places, 354 transitions, 3063 flow [2024-06-21 18:30:10,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3063, PETRI_PLACES=462, PETRI_TRANSITIONS=354} [2024-06-21 18:30:10,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 18:30:10,367 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 354 transitions, 3063 flow [2024-06-21 18:30:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:30:10,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:10,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:10,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 18:30:10,367 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:10,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:10,367 INFO L85 PathProgramCache]: Analyzing trace with hash 635344726, now seen corresponding path program 16 times [2024-06-21 18:30:10,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:10,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569328157] [2024-06-21 18:30:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:12,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569328157] [2024-06-21 18:30:12,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569328157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:12,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:12,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:30:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107162276] [2024-06-21 18:30:12,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:30:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:30:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:30:12,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:30:12,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 354 transitions, 3063 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:12,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:12,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:30:12,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:13,188 INFO L124 PetriNetUnfolderBase]: 740/1470 cut-off events. [2024-06-21 18:30:13,188 INFO L125 PetriNetUnfolderBase]: For 340098/340098 co-relation queries the response was YES. [2024-06-21 18:30:13,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7864 conditions, 1470 events. 740/1470 cut-off events. For 340098/340098 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9456 event pairs, 69 based on Foata normal form. 10/1479 useless extension candidates. Maximal degree in co-relation 7656. Up to 1203 conditions per place. [2024-06-21 18:30:13,208 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 304 selfloop transitions, 55 changer transitions 6/369 dead transitions. [2024-06-21 18:30:13,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 369 transitions, 3909 flow [2024-06-21 18:30:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 18:30:13,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-21 18:30:13,209 INFO L175 Difference]: Start difference. First operand has 462 places, 354 transitions, 3063 flow. Second operand 10 states and 146 transitions. [2024-06-21 18:30:13,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 369 transitions, 3909 flow [2024-06-21 18:30:14,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 369 transitions, 3673 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:30:14,031 INFO L231 Difference]: Finished difference. Result has 461 places, 352 transitions, 2981 flow [2024-06-21 18:30:14,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2981, PETRI_PLACES=461, PETRI_TRANSITIONS=352} [2024-06-21 18:30:14,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-06-21 18:30:14,031 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 352 transitions, 2981 flow [2024-06-21 18:30:14,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:14,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:14,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 18:30:14,032 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:14,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -842072062, now seen corresponding path program 17 times [2024-06-21 18:30:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074218110] [2024-06-21 18:30:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:16,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:16,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074218110] [2024-06-21 18:30:16,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074218110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:16,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:16,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542439144] [2024-06-21 18:30:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:16,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:16,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 352 transitions, 2981 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:16,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:16,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:16,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:17,316 INFO L124 PetriNetUnfolderBase]: 727/1441 cut-off events. [2024-06-21 18:30:17,316 INFO L125 PetriNetUnfolderBase]: For 210720/210720 co-relation queries the response was YES. [2024-06-21 18:30:17,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7741 conditions, 1441 events. 727/1441 cut-off events. For 210720/210720 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9217 event pairs, 67 based on Foata normal form. 2/1442 useless extension candidates. Maximal degree in co-relation 7533. Up to 1232 conditions per place. [2024-06-21 18:30:17,336 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 308 selfloop transitions, 53 changer transitions 0/364 dead transitions. [2024-06-21 18:30:17,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 364 transitions, 3789 flow [2024-06-21 18:30:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:30:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:30:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 18:30:17,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 18:30:17,337 INFO L175 Difference]: Start difference. First operand has 461 places, 352 transitions, 2981 flow. Second operand 11 states and 141 transitions. [2024-06-21 18:30:17,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 364 transitions, 3789 flow [2024-06-21 18:30:18,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 364 transitions, 3551 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 18:30:18,027 INFO L231 Difference]: Finished difference. Result has 462 places, 353 transitions, 2917 flow [2024-06-21 18:30:18,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2917, PETRI_PLACES=462, PETRI_TRANSITIONS=353} [2024-06-21 18:30:18,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 18:30:18,028 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 353 transitions, 2917 flow [2024-06-21 18:30:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:18,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:18,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:18,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 18:30:18,029 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:18,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1008483472, now seen corresponding path program 18 times [2024-06-21 18:30:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198202746] [2024-06-21 18:30:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198202746] [2024-06-21 18:30:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198202746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:20,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36077169] [2024-06-21 18:30:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:20,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:20,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 353 transitions, 2917 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:20,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:20,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:20,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:21,337 INFO L124 PetriNetUnfolderBase]: 739/1469 cut-off events. [2024-06-21 18:30:21,338 INFO L125 PetriNetUnfolderBase]: For 308100/308100 co-relation queries the response was YES. [2024-06-21 18:30:21,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7766 conditions, 1469 events. 739/1469 cut-off events. For 308100/308100 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9450 event pairs, 67 based on Foata normal form. 8/1476 useless extension candidates. Maximal degree in co-relation 7558. Up to 1231 conditions per place. [2024-06-21 18:30:21,358 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 313 selfloop transitions, 38 changer transitions 14/368 dead transitions. [2024-06-21 18:30:21,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 368 transitions, 3749 flow [2024-06-21 18:30:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:30:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:30:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 18:30:21,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 18:30:21,359 INFO L175 Difference]: Start difference. First operand has 462 places, 353 transitions, 2917 flow. Second operand 11 states and 138 transitions. [2024-06-21 18:30:21,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 368 transitions, 3749 flow [2024-06-21 18:30:22,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 368 transitions, 3585 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 18:30:22,165 INFO L231 Difference]: Finished difference. Result has 464 places, 347 transitions, 2799 flow [2024-06-21 18:30:22,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2799, PETRI_PLACES=464, PETRI_TRANSITIONS=347} [2024-06-21 18:30:22,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2024-06-21 18:30:22,165 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 347 transitions, 2799 flow [2024-06-21 18:30:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:22,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:22,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:22,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 18:30:22,165 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1013067442, now seen corresponding path program 19 times [2024-06-21 18:30:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978604535] [2024-06-21 18:30:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:24,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978604535] [2024-06-21 18:30:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978604535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:24,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:24,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166090057] [2024-06-21 18:30:24,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:24,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:24,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:24,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:24,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 347 transitions, 2799 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:25,097 INFO L124 PetriNetUnfolderBase]: 717/1423 cut-off events. [2024-06-21 18:30:25,097 INFO L125 PetriNetUnfolderBase]: For 213263/213263 co-relation queries the response was YES. [2024-06-21 18:30:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7487 conditions, 1423 events. 717/1423 cut-off events. For 213263/213263 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9088 event pairs, 63 based on Foata normal form. 2/1424 useless extension candidates. Maximal degree in co-relation 7278. Up to 1199 conditions per place. [2024-06-21 18:30:25,115 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 315 selfloop transitions, 43 changer transitions 0/361 dead transitions. [2024-06-21 18:30:25,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 361 transitions, 3607 flow [2024-06-21 18:30:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:30:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:30:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 18:30:25,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 18:30:25,116 INFO L175 Difference]: Start difference. First operand has 464 places, 347 transitions, 2799 flow. Second operand 11 states and 136 transitions. [2024-06-21 18:30:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 361 transitions, 3607 flow [2024-06-21 18:30:25,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 361 transitions, 3521 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 18:30:25,833 INFO L231 Difference]: Finished difference. Result has 456 places, 348 transitions, 2870 flow [2024-06-21 18:30:25,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2870, PETRI_PLACES=456, PETRI_TRANSITIONS=348} [2024-06-21 18:30:25,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 18:30:25,833 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 348 transitions, 2870 flow [2024-06-21 18:30:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:25,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:25,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:25,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 18:30:25,834 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:25,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:25,834 INFO L85 PathProgramCache]: Analyzing trace with hash -842249692, now seen corresponding path program 20 times [2024-06-21 18:30:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:25,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284992733] [2024-06-21 18:30:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284992733] [2024-06-21 18:30:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284992733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983086845] [2024-06-21 18:30:28,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:28,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 348 transitions, 2870 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:28,974 INFO L124 PetriNetUnfolderBase]: 721/1431 cut-off events. [2024-06-21 18:30:28,974 INFO L125 PetriNetUnfolderBase]: For 206712/206712 co-relation queries the response was YES. [2024-06-21 18:30:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 1431 events. 721/1431 cut-off events. For 206712/206712 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 9143 event pairs, 67 based on Foata normal form. 2/1432 useless extension candidates. Maximal degree in co-relation 7412. Up to 1192 conditions per place. [2024-06-21 18:30:28,994 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 303 selfloop transitions, 55 changer transitions 0/361 dead transitions. [2024-06-21 18:30:28,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 361 transitions, 3678 flow [2024-06-21 18:30:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:30:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:30:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 18:30:28,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 18:30:28,995 INFO L175 Difference]: Start difference. First operand has 456 places, 348 transitions, 2870 flow. Second operand 11 states and 142 transitions. [2024-06-21 18:30:28,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 361 transitions, 3678 flow [2024-06-21 18:30:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 361 transitions, 3533 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 18:30:29,673 INFO L231 Difference]: Finished difference. Result has 458 places, 349 transitions, 2908 flow [2024-06-21 18:30:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2908, PETRI_PLACES=458, PETRI_TRANSITIONS=349} [2024-06-21 18:30:29,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2024-06-21 18:30:29,673 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 349 transitions, 2908 flow [2024-06-21 18:30:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:29,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:29,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:29,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 18:30:29,674 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:29,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 875089296, now seen corresponding path program 4 times [2024-06-21 18:30:29,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333246441] [2024-06-21 18:30:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:33,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333246441] [2024-06-21 18:30:33,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333246441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:33,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:30:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697921570] [2024-06-21 18:30:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:33,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:30:33,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:30:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:30:33,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:33,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 349 transitions, 2908 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:33,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:33,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:33,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:34,817 INFO L124 PetriNetUnfolderBase]: 733/1463 cut-off events. [2024-06-21 18:30:34,817 INFO L125 PetriNetUnfolderBase]: For 308787/308787 co-relation queries the response was YES. [2024-06-21 18:30:34,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 1463 events. 733/1463 cut-off events. For 308787/308787 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9416 event pairs, 75 based on Foata normal form. 8/1470 useless extension candidates. Maximal degree in co-relation 7452. Up to 1090 conditions per place. [2024-06-21 18:30:34,832 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 274 selfloop transitions, 78 changer transitions 9/364 dead transitions. [2024-06-21 18:30:34,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 364 transitions, 3688 flow [2024-06-21 18:30:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 158 transitions. [2024-06-21 18:30:34,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2024-06-21 18:30:34,833 INFO L175 Difference]: Start difference. First operand has 458 places, 349 transitions, 2908 flow. Second operand 12 states and 158 transitions. [2024-06-21 18:30:34,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 364 transitions, 3688 flow [2024-06-21 18:30:35,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 364 transitions, 3517 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 18:30:35,514 INFO L231 Difference]: Finished difference. Result has 461 places, 346 transitions, 2877 flow [2024-06-21 18:30:35,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2877, PETRI_PLACES=461, PETRI_TRANSITIONS=346} [2024-06-21 18:30:35,514 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-06-21 18:30:35,514 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 346 transitions, 2877 flow [2024-06-21 18:30:35,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:35,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:35,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 18:30:35,515 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:35,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 881584416, now seen corresponding path program 5 times [2024-06-21 18:30:35,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802829621] [2024-06-21 18:30:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802829621] [2024-06-21 18:30:37,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802829621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:37,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:37,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055262135] [2024-06-21 18:30:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:38,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:38,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 346 transitions, 2877 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:38,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:38,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:38,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:38,812 INFO L124 PetriNetUnfolderBase]: 746/1494 cut-off events. [2024-06-21 18:30:38,812 INFO L125 PetriNetUnfolderBase]: For 408171/408171 co-relation queries the response was YES. [2024-06-21 18:30:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9173 conditions, 1494 events. 746/1494 cut-off events. For 408171/408171 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9627 event pairs, 81 based on Foata normal form. 6/1499 useless extension candidates. Maximal degree in co-relation 8966. Up to 1076 conditions per place. [2024-06-21 18:30:38,835 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 281 selfloop transitions, 74 changer transitions 7/365 dead transitions. [2024-06-21 18:30:38,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 365 transitions, 4055 flow [2024-06-21 18:30:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 18:30:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2024-06-21 18:30:38,836 INFO L175 Difference]: Start difference. First operand has 461 places, 346 transitions, 2877 flow. Second operand 12 states and 161 transitions. [2024-06-21 18:30:38,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 365 transitions, 4055 flow [2024-06-21 18:30:39,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 365 transitions, 3891 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:30:39,891 INFO L231 Difference]: Finished difference. Result has 459 places, 343 transitions, 2847 flow [2024-06-21 18:30:39,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2847, PETRI_PLACES=459, PETRI_TRANSITIONS=343} [2024-06-21 18:30:39,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 429 predicate places. [2024-06-21 18:30:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 343 transitions, 2847 flow [2024-06-21 18:30:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:39,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 18:30:39,892 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:39,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 881345406, now seen corresponding path program 6 times [2024-06-21 18:30:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638478207] [2024-06-21 18:30:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:43,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:43,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638478207] [2024-06-21 18:30:43,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638478207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:43,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:43,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:43,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035349296] [2024-06-21 18:30:43,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:43,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:43,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:43,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:43,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 343 transitions, 2847 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:43,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:43,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:44,374 INFO L124 PetriNetUnfolderBase]: 721/1439 cut-off events. [2024-06-21 18:30:44,374 INFO L125 PetriNetUnfolderBase]: For 304722/304722 co-relation queries the response was YES. [2024-06-21 18:30:44,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 1439 events. 721/1439 cut-off events. For 304722/304722 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9230 event pairs, 73 based on Foata normal form. 8/1446 useless extension candidates. Maximal degree in co-relation 7280. Up to 1097 conditions per place. [2024-06-21 18:30:44,392 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 279 selfloop transitions, 67 changer transitions 9/358 dead transitions. [2024-06-21 18:30:44,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 358 transitions, 3615 flow [2024-06-21 18:30:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-21 18:30:44,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 18:30:44,393 INFO L175 Difference]: Start difference. First operand has 459 places, 343 transitions, 2847 flow. Second operand 12 states and 155 transitions. [2024-06-21 18:30:44,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 358 transitions, 3615 flow [2024-06-21 18:30:45,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 358 transitions, 3463 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 18:30:45,156 INFO L231 Difference]: Finished difference. Result has 456 places, 340 transitions, 2811 flow [2024-06-21 18:30:45,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2811, PETRI_PLACES=456, PETRI_TRANSITIONS=340} [2024-06-21 18:30:45,156 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 18:30:45,156 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 340 transitions, 2811 flow [2024-06-21 18:30:45,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:45,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:45,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:45,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 18:30:45,157 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:45,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1102990446, now seen corresponding path program 7 times [2024-06-21 18:30:45,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:45,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324182752] [2024-06-21 18:30:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:45,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:49,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:49,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324182752] [2024-06-21 18:30:49,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324182752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:49,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:49,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:49,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148054272] [2024-06-21 18:30:49,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:49,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:49,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:49,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:49,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:49,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 340 transitions, 2811 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:49,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:49,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:49,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:50,000 INFO L124 PetriNetUnfolderBase]: 716/1432 cut-off events. [2024-06-21 18:30:50,000 INFO L125 PetriNetUnfolderBase]: For 298166/298166 co-relation queries the response was YES. [2024-06-21 18:30:50,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7420 conditions, 1432 events. 716/1432 cut-off events. For 298166/298166 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 9173 event pairs, 73 based on Foata normal form. 8/1439 useless extension candidates. Maximal degree in co-relation 7216. Up to 1090 conditions per place. [2024-06-21 18:30:50,020 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 263 selfloop transitions, 80 changer transitions 9/355 dead transitions. [2024-06-21 18:30:50,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 355 transitions, 3573 flow [2024-06-21 18:30:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-21 18:30:50,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-06-21 18:30:50,021 INFO L175 Difference]: Start difference. First operand has 456 places, 340 transitions, 2811 flow. Second operand 12 states and 154 transitions. [2024-06-21 18:30:50,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 355 transitions, 3573 flow [2024-06-21 18:30:50,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 355 transitions, 3435 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:30:50,801 INFO L231 Difference]: Finished difference. Result has 453 places, 337 transitions, 2817 flow [2024-06-21 18:30:50,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2817, PETRI_PLACES=453, PETRI_TRANSITIONS=337} [2024-06-21 18:30:50,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2024-06-21 18:30:50,801 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 337 transitions, 2817 flow [2024-06-21 18:30:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:50,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:50,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 18:30:50,802 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:50,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash -835809008, now seen corresponding path program 8 times [2024-06-21 18:30:50,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:50,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933015005] [2024-06-21 18:30:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933015005] [2024-06-21 18:30:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933015005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:54,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:30:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440347359] [2024-06-21 18:30:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:30:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:30:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:30:54,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:30:54,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 337 transitions, 2817 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:54,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:54,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:30:54,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:55,595 INFO L124 PetriNetUnfolderBase]: 711/1429 cut-off events. [2024-06-21 18:30:55,595 INFO L125 PetriNetUnfolderBase]: For 297043/297043 co-relation queries the response was YES. [2024-06-21 18:30:55,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7409 conditions, 1429 events. 711/1429 cut-off events. For 297043/297043 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9201 event pairs, 75 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 7206. Up to 1175 conditions per place. [2024-06-21 18:30:55,615 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 292 selfloop transitions, 48 changer transitions 9/352 dead transitions. [2024-06-21 18:30:55,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 352 transitions, 3573 flow [2024-06-21 18:30:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 18:30:55,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 18:30:55,616 INFO L175 Difference]: Start difference. First operand has 453 places, 337 transitions, 2817 flow. Second operand 12 states and 142 transitions. [2024-06-21 18:30:55,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 352 transitions, 3573 flow [2024-06-21 18:30:56,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 352 transitions, 3409 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:30:56,261 INFO L231 Difference]: Finished difference. Result has 451 places, 334 transitions, 2733 flow [2024-06-21 18:30:56,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2653, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2733, PETRI_PLACES=451, PETRI_TRANSITIONS=334} [2024-06-21 18:30:56,261 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 421 predicate places. [2024-06-21 18:30:56,261 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 334 transitions, 2733 flow [2024-06-21 18:30:56,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:56,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:56,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 18:30:56,262 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:30:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1111561326, now seen corresponding path program 9 times [2024-06-21 18:30:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552356] [2024-06-21 18:30:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:58,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552356] [2024-06-21 18:30:58,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:58,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:58,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:30:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654524362] [2024-06-21 18:30:58,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:58,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:30:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:30:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:30:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:30:58,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 334 transitions, 2733 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:58,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:58,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:30:58,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:59,279 INFO L124 PetriNetUnfolderBase]: 724/1464 cut-off events. [2024-06-21 18:30:59,279 INFO L125 PetriNetUnfolderBase]: For 386191/386191 co-relation queries the response was YES. [2024-06-21 18:30:59,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8886 conditions, 1464 events. 724/1464 cut-off events. For 386191/386191 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 9394 event pairs, 81 based on Foata normal form. 6/1469 useless extension candidates. Maximal degree in co-relation 8684. Up to 1016 conditions per place. [2024-06-21 18:30:59,300 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 260 selfloop transitions, 82 changer transitions 9/354 dead transitions. [2024-06-21 18:30:59,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 354 transitions, 3881 flow [2024-06-21 18:30:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:30:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:30:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 159 transitions. [2024-06-21 18:30:59,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 18:30:59,301 INFO L175 Difference]: Start difference. First operand has 451 places, 334 transitions, 2733 flow. Second operand 12 states and 159 transitions. [2024-06-21 18:30:59,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 354 transitions, 3881 flow [2024-06-21 18:31:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 354 transitions, 3777 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:31:00,735 INFO L231 Difference]: Finished difference. Result has 449 places, 331 transitions, 2780 flow [2024-06-21 18:31:00,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2780, PETRI_PLACES=449, PETRI_TRANSITIONS=331} [2024-06-21 18:31:00,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 419 predicate places. [2024-06-21 18:31:00,736 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 331 transitions, 2780 flow [2024-06-21 18:31:00,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:00,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:00,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 18:31:00,737 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:00,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1921978068, now seen corresponding path program 10 times [2024-06-21 18:31:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:00,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122392368] [2024-06-21 18:31:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122392368] [2024-06-21 18:31:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122392368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:03,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:31:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347299292] [2024-06-21 18:31:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:31:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:31:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:31:03,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:03,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 331 transitions, 2780 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:03,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:03,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:03,774 INFO L124 PetriNetUnfolderBase]: 729/1479 cut-off events. [2024-06-21 18:31:03,774 INFO L125 PetriNetUnfolderBase]: For 478101/478101 co-relation queries the response was YES. [2024-06-21 18:31:03,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 1479 events. 729/1479 cut-off events. For 478101/478101 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 9517 event pairs, 92 based on Foata normal form. 6/1484 useless extension candidates. Maximal degree in co-relation 9868. Up to 1176 conditions per place. [2024-06-21 18:31:03,794 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 294 selfloop transitions, 46 changer transitions 7/350 dead transitions. [2024-06-21 18:31:03,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 350 transitions, 3916 flow [2024-06-21 18:31:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:31:03,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:31:03,795 INFO L175 Difference]: Start difference. First operand has 449 places, 331 transitions, 2780 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:31:03,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 350 transitions, 3916 flow [2024-06-21 18:31:05,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 350 transitions, 3745 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 18:31:05,164 INFO L231 Difference]: Finished difference. Result has 445 places, 328 transitions, 2688 flow [2024-06-21 18:31:05,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2688, PETRI_PLACES=445, PETRI_TRANSITIONS=328} [2024-06-21 18:31:05,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2024-06-21 18:31:05,164 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 328 transitions, 2688 flow [2024-06-21 18:31:05,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:05,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:05,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:05,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 18:31:05,165 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:05,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1111273026, now seen corresponding path program 11 times [2024-06-21 18:31:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:05,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973734765] [2024-06-21 18:31:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973734765] [2024-06-21 18:31:08,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973734765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:08,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:08,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:31:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455657105] [2024-06-21 18:31:08,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:08,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:31:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:31:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:31:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:08,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 328 transitions, 2688 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:08,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:08,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:08,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:09,416 INFO L124 PetriNetUnfolderBase]: 722/1466 cut-off events. [2024-06-21 18:31:09,416 INFO L125 PetriNetUnfolderBase]: For 465156/465156 co-relation queries the response was YES. [2024-06-21 18:31:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 1466 events. 722/1466 cut-off events. For 465156/465156 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9413 event pairs, 92 based on Foata normal form. 6/1471 useless extension candidates. Maximal degree in co-relation 9711. Up to 1109 conditions per place. [2024-06-21 18:31:09,436 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 251 selfloop transitions, 78 changer transitions 11/343 dead transitions. [2024-06-21 18:31:09,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 343 transitions, 3418 flow [2024-06-21 18:31:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:31:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:31:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 18:31:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 18:31:09,437 INFO L175 Difference]: Start difference. First operand has 445 places, 328 transitions, 2688 flow. Second operand 12 states and 153 transitions. [2024-06-21 18:31:09,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 343 transitions, 3418 flow [2024-06-21 18:31:11,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 343 transitions, 3324 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:31:11,035 INFO L231 Difference]: Finished difference. Result has 444 places, 324 transitions, 2726 flow [2024-06-21 18:31:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2726, PETRI_PLACES=444, PETRI_TRANSITIONS=324} [2024-06-21 18:31:11,035 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2024-06-21 18:31:11,035 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 324 transitions, 2726 flow [2024-06-21 18:31:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:11,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:11,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 18:31:11,036 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -842065118, now seen corresponding path program 12 times [2024-06-21 18:31:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732801102] [2024-06-21 18:31:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:13,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:13,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732801102] [2024-06-21 18:31:13,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732801102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:13,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:13,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 18:31:13,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049060732] [2024-06-21 18:31:13,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:13,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 18:31:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 18:31:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-21 18:31:14,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:14,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 324 transitions, 2726 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:14,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:14,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:14,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:15,115 INFO L124 PetriNetUnfolderBase]: 696/1408 cut-off events. [2024-06-21 18:31:15,115 INFO L125 PetriNetUnfolderBase]: For 369452/369452 co-relation queries the response was YES. [2024-06-21 18:31:15,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8344 conditions, 1408 events. 696/1408 cut-off events. For 369452/369452 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8986 event pairs, 84 based on Foata normal form. 8/1415 useless extension candidates. Maximal degree in co-relation 8146. Up to 1160 conditions per place. [2024-06-21 18:31:15,134 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 282 selfloop transitions, 45 changer transitions 9/339 dead transitions. [2024-06-21 18:31:15,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 339 transitions, 3456 flow [2024-06-21 18:31:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:31:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:31:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2024-06-21 18:31:15,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2024-06-21 18:31:15,135 INFO L175 Difference]: Start difference. First operand has 444 places, 324 transitions, 2726 flow. Second operand 12 states and 151 transitions. [2024-06-21 18:31:15,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 339 transitions, 3456 flow [2024-06-21 18:31:16,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 339 transitions, 3288 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 18:31:16,146 INFO L231 Difference]: Finished difference. Result has 438 places, 321 transitions, 2630 flow [2024-06-21 18:31:16,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2630, PETRI_PLACES=438, PETRI_TRANSITIONS=321} [2024-06-21 18:31:16,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2024-06-21 18:31:16,146 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 321 transitions, 2630 flow [2024-06-21 18:31:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:16,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:16,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:16,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 18:31:16,147 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:16,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -434189774, now seen corresponding path program 13 times [2024-06-21 18:31:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350290110] [2024-06-21 18:31:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350290110] [2024-06-21 18:31:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350290110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:18,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:18,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238397219] [2024-06-21 18:31:18,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:18,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:18,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:18,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 321 transitions, 2630 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:18,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:18,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:18,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:19,357 INFO L124 PetriNetUnfolderBase]: 672/1360 cut-off events. [2024-06-21 18:31:19,357 INFO L125 PetriNetUnfolderBase]: For 239700/239700 co-relation queries the response was YES. [2024-06-21 18:31:19,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 1360 events. 672/1360 cut-off events. For 239700/239700 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8659 event pairs, 67 based on Foata normal form. 6/1365 useless extension candidates. Maximal degree in co-relation 6798. Up to 1016 conditions per place. [2024-06-21 18:31:19,370 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 249 selfloop transitions, 74 changer transitions 10/336 dead transitions. [2024-06-21 18:31:19,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 336 transitions, 3346 flow [2024-06-21 18:31:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:31:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:31:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 18:31:19,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 18:31:19,371 INFO L175 Difference]: Start difference. First operand has 438 places, 321 transitions, 2630 flow. Second operand 12 states and 152 transitions. [2024-06-21 18:31:19,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 336 transitions, 3346 flow [2024-06-21 18:31:20,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 336 transitions, 3252 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:31:20,206 INFO L231 Difference]: Finished difference. Result has 435 places, 318 transitions, 2665 flow [2024-06-21 18:31:20,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2665, PETRI_PLACES=435, PETRI_TRANSITIONS=318} [2024-06-21 18:31:20,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 405 predicate places. [2024-06-21 18:31:20,207 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 318 transitions, 2665 flow [2024-06-21 18:31:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:20,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:20,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 18:31:20,207 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:20,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1625149106, now seen corresponding path program 21 times [2024-06-21 18:31:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530144068] [2024-06-21 18:31:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530144068] [2024-06-21 18:31:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530144068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:23,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:23,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215198516] [2024-06-21 18:31:23,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:23,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:23,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 318 transitions, 2665 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:23,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:23,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:23,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:24,035 INFO L124 PetriNetUnfolderBase]: 661/1331 cut-off events. [2024-06-21 18:31:24,035 INFO L125 PetriNetUnfolderBase]: For 182154/182154 co-relation queries the response was YES. [2024-06-21 18:31:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7060 conditions, 1331 events. 661/1331 cut-off events. For 182154/182154 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8462 event pairs, 78 based on Foata normal form. 2/1332 useless extension candidates. Maximal degree in co-relation 6866. Up to 1138 conditions per place. [2024-06-21 18:31:24,053 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 280 selfloop transitions, 45 changer transitions 0/328 dead transitions. [2024-06-21 18:31:24,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 328 transitions, 3401 flow [2024-06-21 18:31:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 18:31:24,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 18:31:24,057 INFO L175 Difference]: Start difference. First operand has 435 places, 318 transitions, 2665 flow. Second operand 11 states and 136 transitions. [2024-06-21 18:31:24,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 328 transitions, 3401 flow [2024-06-21 18:31:24,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 328 transitions, 3247 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 18:31:24,853 INFO L231 Difference]: Finished difference. Result has 429 places, 319 transitions, 2675 flow [2024-06-21 18:31:24,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2675, PETRI_PLACES=429, PETRI_TRANSITIONS=319} [2024-06-21 18:31:24,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 399 predicate places. [2024-06-21 18:31:24,853 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 319 transitions, 2675 flow [2024-06-21 18:31:24,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:24,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:24,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:24,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 18:31:24,854 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:24,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1625326736, now seen corresponding path program 22 times [2024-06-21 18:31:24,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:24,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165112006] [2024-06-21 18:31:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:24,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165112006] [2024-06-21 18:31:28,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165112006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:28,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:28,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981709354] [2024-06-21 18:31:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:28,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 319 transitions, 2675 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:28,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:28,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:28,691 INFO L124 PetriNetUnfolderBase]: 665/1339 cut-off events. [2024-06-21 18:31:28,691 INFO L125 PetriNetUnfolderBase]: For 180220/180220 co-relation queries the response was YES. [2024-06-21 18:31:28,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7143 conditions, 1339 events. 665/1339 cut-off events. For 180220/180220 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8512 event pairs, 78 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 6951. Up to 1132 conditions per place. [2024-06-21 18:31:28,708 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 281 selfloop transitions, 46 changer transitions 0/330 dead transitions. [2024-06-21 18:31:28,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 330 transitions, 3419 flow [2024-06-21 18:31:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 18:31:28,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 18:31:28,709 INFO L175 Difference]: Start difference. First operand has 429 places, 319 transitions, 2675 flow. Second operand 11 states and 138 transitions. [2024-06-21 18:31:28,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 330 transitions, 3419 flow [2024-06-21 18:31:29,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 330 transitions, 3258 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 18:31:29,671 INFO L231 Difference]: Finished difference. Result has 431 places, 320 transitions, 2682 flow [2024-06-21 18:31:29,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2682, PETRI_PLACES=431, PETRI_TRANSITIONS=320} [2024-06-21 18:31:29,672 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 401 predicate places. [2024-06-21 18:31:29,672 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 320 transitions, 2682 flow [2024-06-21 18:31:29,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:29,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:29,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 18:31:29,672 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:29,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 7661750, now seen corresponding path program 23 times [2024-06-21 18:31:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843789874] [2024-06-21 18:31:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:31,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843789874] [2024-06-21 18:31:31,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843789874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:31,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:31:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585481014] [2024-06-21 18:31:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:31,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:31:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:31,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:31:31,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:31:31,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:31:31,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 320 transitions, 2682 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:31,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:31,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:31:31,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:32,192 INFO L124 PetriNetUnfolderBase]: 669/1347 cut-off events. [2024-06-21 18:31:32,192 INFO L125 PetriNetUnfolderBase]: For 182780/182780 co-relation queries the response was YES. [2024-06-21 18:31:32,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7189 conditions, 1347 events. 669/1347 cut-off events. For 182780/182780 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8598 event pairs, 76 based on Foata normal form. 2/1348 useless extension candidates. Maximal degree in co-relation 6996. Up to 1129 conditions per place. [2024-06-21 18:31:32,207 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 286 selfloop transitions, 42 changer transitions 0/332 dead transitions. [2024-06-21 18:31:32,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 332 transitions, 3432 flow [2024-06-21 18:31:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 18:31:32,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 18:31:32,213 INFO L175 Difference]: Start difference. First operand has 431 places, 320 transitions, 2682 flow. Second operand 10 states and 137 transitions. [2024-06-21 18:31:32,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 332 transitions, 3432 flow [2024-06-21 18:31:33,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 332 transitions, 3274 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 18:31:33,110 INFO L231 Difference]: Finished difference. Result has 432 places, 321 transitions, 2686 flow [2024-06-21 18:31:33,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2686, PETRI_PLACES=432, PETRI_TRANSITIONS=321} [2024-06-21 18:31:33,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 402 predicate places. [2024-06-21 18:31:33,111 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 321 transitions, 2686 flow [2024-06-21 18:31:33,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:33,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:33,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 18:31:33,111 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:33,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1733025816, now seen corresponding path program 24 times [2024-06-21 18:31:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:33,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696960116] [2024-06-21 18:31:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:35,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696960116] [2024-06-21 18:31:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696960116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:35,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:35,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:31:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965329450] [2024-06-21 18:31:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:31:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:31:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:31:35,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:35,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 321 transitions, 2686 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:31:35,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:35,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:35,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:36,293 INFO L124 PetriNetUnfolderBase]: 685/1383 cut-off events. [2024-06-21 18:31:36,293 INFO L125 PetriNetUnfolderBase]: For 303614/303614 co-relation queries the response was YES. [2024-06-21 18:31:36,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7336 conditions, 1383 events. 685/1383 cut-off events. For 303614/303614 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8832 event pairs, 84 based on Foata normal form. 10/1392 useless extension candidates. Maximal degree in co-relation 7142. Up to 834 conditions per place. [2024-06-21 18:31:36,312 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 128 changer transitions 5/334 dead transitions. [2024-06-21 18:31:36,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 334 transitions, 3470 flow [2024-06-21 18:31:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-21 18:31:36,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-06-21 18:31:36,313 INFO L175 Difference]: Start difference. First operand has 432 places, 321 transitions, 2686 flow. Second operand 10 states and 144 transitions. [2024-06-21 18:31:36,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 334 transitions, 3470 flow [2024-06-21 18:31:37,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 334 transitions, 3318 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 18:31:37,186 INFO L231 Difference]: Finished difference. Result has 434 places, 320 transitions, 2856 flow [2024-06-21 18:31:37,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2856, PETRI_PLACES=434, PETRI_TRANSITIONS=320} [2024-06-21 18:31:37,186 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 404 predicate places. [2024-06-21 18:31:37,187 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 320 transitions, 2856 flow [2024-06-21 18:31:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:31:37,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:37,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:37,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 18:31:37,187 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:37,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash 184913240, now seen corresponding path program 25 times [2024-06-21 18:31:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:37,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988964745] [2024-06-21 18:31:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988964745] [2024-06-21 18:31:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988964745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:39,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850101464] [2024-06-21 18:31:39,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:39,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:39,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 320 transitions, 2856 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:39,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:39,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:39,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:40,169 INFO L124 PetriNetUnfolderBase]: 684/1382 cut-off events. [2024-06-21 18:31:40,169 INFO L125 PetriNetUnfolderBase]: For 305875/305875 co-relation queries the response was YES. [2024-06-21 18:31:40,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7523 conditions, 1382 events. 684/1382 cut-off events. For 305875/305875 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8848 event pairs, 84 based on Foata normal form. 10/1391 useless extension candidates. Maximal degree in co-relation 7328. Up to 1114 conditions per place. [2024-06-21 18:31:40,187 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 57 changer transitions 6/333 dead transitions. [2024-06-21 18:31:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 333 transitions, 3640 flow [2024-06-21 18:31:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 18:31:40,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 18:31:40,187 INFO L175 Difference]: Start difference. First operand has 434 places, 320 transitions, 2856 flow. Second operand 11 states and 144 transitions. [2024-06-21 18:31:40,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 333 transitions, 3640 flow [2024-06-21 18:31:41,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 333 transitions, 3314 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 18:31:41,120 INFO L231 Difference]: Finished difference. Result has 437 places, 318 transitions, 2705 flow [2024-06-21 18:31:41,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2705, PETRI_PLACES=437, PETRI_TRANSITIONS=318} [2024-06-21 18:31:41,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 407 predicate places. [2024-06-21 18:31:41,121 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 318 transitions, 2705 flow [2024-06-21 18:31:41,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:41,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:41,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:41,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 18:31:41,121 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:41,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 178657130, now seen corresponding path program 26 times [2024-06-21 18:31:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71715461] [2024-06-21 18:31:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:43,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:43,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71715461] [2024-06-21 18:31:43,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71715461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:43,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:43,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143582985] [2024-06-21 18:31:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:44,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:44,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 318 transitions, 2705 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:44,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:44,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:44,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:44,951 INFO L124 PetriNetUnfolderBase]: 671/1353 cut-off events. [2024-06-21 18:31:44,952 INFO L125 PetriNetUnfolderBase]: For 190708/190708 co-relation queries the response was YES. [2024-06-21 18:31:44,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7285 conditions, 1353 events. 671/1353 cut-off events. For 190708/190708 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 8620 event pairs, 80 based on Foata normal form. 2/1354 useless extension candidates. Maximal degree in co-relation 7089. Up to 1122 conditions per place. [2024-06-21 18:31:44,969 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 268 selfloop transitions, 57 changer transitions 0/328 dead transitions. [2024-06-21 18:31:44,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 328 transitions, 3451 flow [2024-06-21 18:31:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 18:31:44,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 18:31:44,970 INFO L175 Difference]: Start difference. First operand has 437 places, 318 transitions, 2705 flow. Second operand 11 states and 141 transitions. [2024-06-21 18:31:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 328 transitions, 3451 flow [2024-06-21 18:31:45,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 328 transitions, 3239 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-21 18:31:45,857 INFO L231 Difference]: Finished difference. Result has 437 places, 319 transitions, 2691 flow [2024-06-21 18:31:45,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2691, PETRI_PLACES=437, PETRI_TRANSITIONS=319} [2024-06-21 18:31:45,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 407 predicate places. [2024-06-21 18:31:45,858 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 319 transitions, 2691 flow [2024-06-21 18:31:45,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:45,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:45,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 18:31:45,858 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:45,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash 148330184, now seen corresponding path program 27 times [2024-06-21 18:31:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157382526] [2024-06-21 18:31:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:48,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157382526] [2024-06-21 18:31:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157382526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202848301] [2024-06-21 18:31:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:49,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:49,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 319 transitions, 2691 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:49,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:49,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:49,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:49,948 INFO L124 PetriNetUnfolderBase]: 675/1361 cut-off events. [2024-06-21 18:31:49,949 INFO L125 PetriNetUnfolderBase]: For 193048/193048 co-relation queries the response was YES. [2024-06-21 18:31:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7316 conditions, 1361 events. 675/1361 cut-off events. For 193048/193048 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8690 event pairs, 82 based on Foata normal form. 2/1362 useless extension candidates. Maximal degree in co-relation 7119. Up to 854 conditions per place. [2024-06-21 18:31:49,962 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 189 selfloop transitions, 137 changer transitions 0/329 dead transitions. [2024-06-21 18:31:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 329 transitions, 3441 flow [2024-06-21 18:31:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 18:31:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 18:31:49,963 INFO L175 Difference]: Start difference. First operand has 437 places, 319 transitions, 2691 flow. Second operand 11 states and 148 transitions. [2024-06-21 18:31:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 329 transitions, 3441 flow [2024-06-21 18:31:50,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 329 transitions, 3253 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 18:31:50,839 INFO L231 Difference]: Finished difference. Result has 439 places, 320 transitions, 2863 flow [2024-06-21 18:31:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2863, PETRI_PLACES=439, PETRI_TRANSITIONS=320} [2024-06-21 18:31:50,839 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 409 predicate places. [2024-06-21 18:31:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 320 transitions, 2863 flow [2024-06-21 18:31:50,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:50,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:50,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:50,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 18:31:50,840 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:50,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1489419902, now seen corresponding path program 28 times [2024-06-21 18:31:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:50,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111024409] [2024-06-21 18:31:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111024409] [2024-06-21 18:31:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111024409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:53,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:31:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518732687] [2024-06-21 18:31:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:53,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:31:53,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:31:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:31:54,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:54,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 320 transitions, 2863 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:54,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:54,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:54,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:54,773 INFO L124 PetriNetUnfolderBase]: 708/1428 cut-off events. [2024-06-21 18:31:54,773 INFO L125 PetriNetUnfolderBase]: For 353508/353508 co-relation queries the response was YES. [2024-06-21 18:31:54,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9717 conditions, 1428 events. 708/1428 cut-off events. For 353508/353508 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 9137 event pairs, 95 based on Foata normal form. 2/1429 useless extension candidates. Maximal degree in co-relation 9519. Up to 836 conditions per place. [2024-06-21 18:31:54,793 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 193 selfloop transitions, 140 changer transitions 0/336 dead transitions. [2024-06-21 18:31:54,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 336 transitions, 4097 flow [2024-06-21 18:31:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:31:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:31:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-06-21 18:31:54,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44868035190615835 [2024-06-21 18:31:54,794 INFO L175 Difference]: Start difference. First operand has 439 places, 320 transitions, 2863 flow. Second operand 11 states and 153 transitions. [2024-06-21 18:31:54,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 336 transitions, 4097 flow [2024-06-21 18:31:56,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 336 transitions, 3747 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 18:31:56,015 INFO L231 Difference]: Finished difference. Result has 441 places, 322 transitions, 2963 flow [2024-06-21 18:31:56,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2963, PETRI_PLACES=441, PETRI_TRANSITIONS=322} [2024-06-21 18:31:56,016 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 411 predicate places. [2024-06-21 18:31:56,016 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 322 transitions, 2963 flow [2024-06-21 18:31:56,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:56,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:56,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 18:31:56,017 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:31:56,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1349163488, now seen corresponding path program 29 times [2024-06-21 18:31:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653008484] [2024-06-21 18:31:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653008484] [2024-06-21 18:31:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653008484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:58,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:31:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572744294] [2024-06-21 18:31:58,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:58,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:31:58,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:31:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:31:58,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:31:58,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 322 transitions, 2963 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:31:58,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:58,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:31:58,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:59,634 INFO L124 PetriNetUnfolderBase]: 724/1464 cut-off events. [2024-06-21 18:31:59,634 INFO L125 PetriNetUnfolderBase]: For 483165/483165 co-relation queries the response was YES. [2024-06-21 18:31:59,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9894 conditions, 1464 events. 724/1464 cut-off events. For 483165/483165 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 9378 event pairs, 101 based on Foata normal form. 10/1473 useless extension candidates. Maximal degree in co-relation 9695. Up to 925 conditions per place. [2024-06-21 18:31:59,649 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 204 selfloop transitions, 122 changer transitions 6/335 dead transitions. [2024-06-21 18:31:59,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 335 transitions, 3759 flow [2024-06-21 18:31:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 18:31:59,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-21 18:31:59,650 INFO L175 Difference]: Start difference. First operand has 441 places, 322 transitions, 2963 flow. Second operand 10 states and 146 transitions. [2024-06-21 18:31:59,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 335 transitions, 3759 flow [2024-06-21 18:32:01,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 335 transitions, 3353 flow, removed 62 selfloop flow, removed 13 redundant places. [2024-06-21 18:32:01,090 INFO L231 Difference]: Finished difference. Result has 438 places, 320 transitions, 2871 flow [2024-06-21 18:32:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2871, PETRI_PLACES=438, PETRI_TRANSITIONS=320} [2024-06-21 18:32:01,090 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2024-06-21 18:32:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 320 transitions, 2871 flow [2024-06-21 18:32:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-21 18:32:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:01,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 18:32:01,091 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:32:01,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1459092956, now seen corresponding path program 30 times [2024-06-21 18:32:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993463769] [2024-06-21 18:32:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15