./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.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/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:33:54,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:33:54,087 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:33:54,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:33:54,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:33:54,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:33:54,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:33:54,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:33:54,122 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:33:54,125 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:33:54,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:33:54,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:33:54,126 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:33:54,127 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:33:54,127 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:33:54,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:33:54,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:33:54,127 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:33:54,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:33:54,128 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:33:54,128 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:33:54,128 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:33:54,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:33:54,129 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:33:54,129 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:33:54,129 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:33:54,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:33:54,130 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:33:54,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:33:54,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:33:54,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:33:54,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:33:54,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:33:54,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:33:54,132 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:33:54,133 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:33:54,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:33:54,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:33:54,133 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:33:54,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:33:54,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:33:54,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:33:54,381 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:33:54,382 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:33:54,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 00:33:55,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:33:55,769 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:33:55,770 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 00:33:55,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93137e967/ee1f9ea72b504377a4a9ee6f6440b08b/FLAGf747d4645 [2024-06-28 00:33:55,793 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93137e967/ee1f9ea72b504377a4a9ee6f6440b08b [2024-06-28 00:33:55,795 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:33:55,795 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:33:55,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_rmo.yml/witness.yml [2024-06-28 00:33:55,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:33:55,864 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:33:55,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:33:55,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:33:55,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:33:55,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:33:55" (1/2) ... [2024-06-28 00:33:55,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48529f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:33:55, skipping insertion in model container [2024-06-28 00:33:55,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:33:55" (1/2) ... [2024-06-28 00:33:55,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71cd11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:33:55, skipping insertion in model container [2024-06-28 00:33:55,872 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:55" (2/2) ... [2024-06-28 00:33:55,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48529f82 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:55, skipping insertion in model container [2024-06-28 00:33:55,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:55" (2/2) ... [2024-06-28 00:33:55,874 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:33:55,897 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:33:55,899 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-28 00:33:55,899 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-28 00:33:55,899 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-28 00:33:55,900 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:33:55,900 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-28 00:33:55,943 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:33:56,198 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:33:56,208 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:33:56,390 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:33:56,468 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:33:56,469 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56 WrapperNode [2024-06-28 00:33:56,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:33:56,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:33:56,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:33:56,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:33:56,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,549 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 180 [2024-06-28 00:33:56,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:33:56,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:33:56,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:33:56,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:33:56,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,609 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 00:33:56,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:33:56,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:33:56,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:33:56,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:33:56,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (1/1) ... [2024-06-28 00:33:56,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:33:56,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:33:56,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:33:56,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:33:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:33:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:33:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:33:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:33:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:33:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:33:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:33:56,791 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:33:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:33:56,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:33:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:33:56,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:33:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:33:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:33:56,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:33:56,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:33:56,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:33:56,796 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:33:56,953 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:33:56,954 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:33:57,442 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:33:57,442 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:33:57,758 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:33:57,758 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:33:57,758 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:33:57 BoogieIcfgContainer [2024-06-28 00:33:57,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:33:57,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:33:57,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:33:57,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:33:57,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:33:55" (1/4) ... [2024-06-28 00:33:57,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2242db64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:33:57, skipping insertion in model container [2024-06-28 00:33:57,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:55" (2/4) ... [2024-06-28 00:33:57,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2242db64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:33:57, skipping insertion in model container [2024-06-28 00:33:57,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:56" (3/4) ... [2024-06-28 00:33:57,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2242db64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:33:57, skipping insertion in model container [2024-06-28 00:33:57,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:33:57" (4/4) ... [2024-06-28 00:33:57,767 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-28 00:33:57,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:33:57,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:33:57,781 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:33:57,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:33:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 00:33:57,895 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 00:33:57,895 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:33:57,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:33:57,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 00:33:57,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 00:33:57,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:33:57,920 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;@2ead2b57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:33:57,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:33:57,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:33:57,925 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:33:57,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:33:57,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:57,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:33:57,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:57,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash 721393202, now seen corresponding path program 1 times [2024-06-28 00:33:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323244475] [2024-06-28 00:33:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323244475] [2024-06-28 00:33:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323244475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:59,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:59,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:33:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570661720] [2024-06-28 00:33:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:33:59,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:33:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:33:59,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 00:33:59,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:59,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:59,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 00:33:59,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:00,170 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-28 00:34:00,171 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 00:34:00,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9433 event pairs, 800 based on Foata normal form. 1/1878 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-28 00:34:00,183 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 00:34:00,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-28 00:34:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:34:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:34:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 00:34:00,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-28 00:34:00,193 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-28 00:34:00,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-28 00:34:00,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:00,197 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 00:34:00,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 00:34:00,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 00:34:00,201 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 00:34:00,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:00,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:00,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:00,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:34:00,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:00,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1769248203, now seen corresponding path program 1 times [2024-06-28 00:34:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:00,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84057539] [2024-06-28 00:34:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:00,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84057539] [2024-06-28 00:34:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84057539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:01,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:34:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583638293] [2024-06-28 00:34:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:34:01,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:34:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:34:01,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:01,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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) [2024-06-28 00:34:01,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:01,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:02,058 INFO L124 PetriNetUnfolderBase]: 1406/2140 cut-off events. [2024-06-28 00:34:02,058 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-28 00:34:02,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 2140 events. 1406/2140 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10178 event pairs, 805 based on Foata normal form. 3/2142 useless extension candidates. Maximal degree in co-relation 4887. Up to 2087 conditions per place. [2024-06-28 00:34:02,067 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-28 00:34:02,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 262 flow [2024-06-28 00:34:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-28 00:34:02,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-28 00:34:02,069 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-28 00:34:02,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 262 flow [2024-06-28 00:34:02,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:02,071 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 00:34:02,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 00:34:02,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 00:34:02,072 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 00:34:02,072 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) [2024-06-28 00:34:02,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:02,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:02,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:34:02,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:02,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash -559494902, now seen corresponding path program 1 times [2024-06-28 00:34:02,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:02,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251002691] [2024-06-28 00:34:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:04,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251002691] [2024-06-28 00:34:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251002691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484727523] [2024-06-28 00:34:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:04,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:04,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 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) [2024-06-28 00:34:04,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:04,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:04,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:04,840 INFO L124 PetriNetUnfolderBase]: 1399/2131 cut-off events. [2024-06-28 00:34:04,841 INFO L125 PetriNetUnfolderBase]: For 1149/1149 co-relation queries the response was YES. [2024-06-28 00:34:04,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 2131 events. 1399/2131 cut-off events. For 1149/1149 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10198 event pairs, 652 based on Foata normal form. 4/2134 useless extension candidates. Maximal degree in co-relation 5412. Up to 2041 conditions per place. [2024-06-28 00:34:04,850 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-28 00:34:04,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 404 flow [2024-06-28 00:34:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-28 00:34:04,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441860465116279 [2024-06-28 00:34:04,852 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 117 transitions. [2024-06-28 00:34:04,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 404 flow [2024-06-28 00:34:04,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:04,854 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 222 flow [2024-06-28 00:34:04,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-28 00:34:04,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-28 00:34:04,855 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 222 flow [2024-06-28 00:34:04,855 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) [2024-06-28 00:34:04,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:04,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:04,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:34:04,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:04,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash 925391727, now seen corresponding path program 1 times [2024-06-28 00:34:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:04,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971169433] [2024-06-28 00:34:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971169433] [2024-06-28 00:34:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971169433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:06,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291249444] [2024-06-28 00:34:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:07,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 222 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) [2024-06-28 00:34:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:07,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:07,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:07,859 INFO L124 PetriNetUnfolderBase]: 1388/2114 cut-off events. [2024-06-28 00:34:07,859 INFO L125 PetriNetUnfolderBase]: For 2565/2565 co-relation queries the response was YES. [2024-06-28 00:34:07,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 2114 events. 1388/2114 cut-off events. For 2565/2565 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10080 event pairs, 481 based on Foata normal form. 8/2121 useless extension candidates. Maximal degree in co-relation 6203. Up to 1974 conditions per place. [2024-06-28 00:34:07,871 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 65 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 00:34:07,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 496 flow [2024-06-28 00:34:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 00:34:07,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-28 00:34:07,875 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 222 flow. Second operand 6 states and 134 transitions. [2024-06-28 00:34:07,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 496 flow [2024-06-28 00:34:07,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:07,882 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 269 flow [2024-06-28 00:34:07,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-28 00:34:07,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-28 00:34:07,884 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 269 flow [2024-06-28 00:34:07,884 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) [2024-06-28 00:34:07,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:07,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:07,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:34:07,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:07,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 368808262, now seen corresponding path program 1 times [2024-06-28 00:34:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13143738] [2024-06-28 00:34:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:09,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:09,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13143738] [2024-06-28 00:34:09,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13143738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:09,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:09,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914624821] [2024-06-28 00:34:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:09,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:09,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:09,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:09,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:10,427 INFO L124 PetriNetUnfolderBase]: 1292/2013 cut-off events. [2024-06-28 00:34:10,427 INFO L125 PetriNetUnfolderBase]: For 3963/3984 co-relation queries the response was YES. [2024-06-28 00:34:10,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 2013 events. 1292/2013 cut-off events. For 3963/3984 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10133 event pairs, 732 based on Foata normal form. 4/1980 useless extension candidates. Maximal degree in co-relation 6357. Up to 1878 conditions per place. [2024-06-28 00:34:10,439 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 51 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-28 00:34:10,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 493 flow [2024-06-28 00:34:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-28 00:34:10,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-28 00:34:10,441 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 269 flow. Second operand 5 states and 99 transitions. [2024-06-28 00:34:10,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 493 flow [2024-06-28 00:34:10,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 458 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:10,445 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 333 flow [2024-06-28 00:34:10,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 00:34:10,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-28 00:34:10,446 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 333 flow [2024-06-28 00:34:10,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:10,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:10,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:34:10,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:10,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1410256414, now seen corresponding path program 1 times [2024-06-28 00:34:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:10,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111953477] [2024-06-28 00:34:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111953477] [2024-06-28 00:34:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111953477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:12,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:12,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:12,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039883013] [2024-06-28 00:34:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:12,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:12,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:12,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:12,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:12,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:12,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:12,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:12,995 INFO L124 PetriNetUnfolderBase]: 1287/2007 cut-off events. [2024-06-28 00:34:12,995 INFO L125 PetriNetUnfolderBase]: For 5339/5362 co-relation queries the response was YES. [2024-06-28 00:34:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6947 conditions, 2007 events. 1287/2007 cut-off events. For 5339/5362 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10121 event pairs, 731 based on Foata normal form. 6/1977 useless extension candidates. Maximal degree in co-relation 6921. Up to 1875 conditions per place. [2024-06-28 00:34:13,007 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 51 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-28 00:34:13,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 541 flow [2024-06-28 00:34:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-28 00:34:13,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-28 00:34:13,009 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 333 flow. Second operand 5 states and 99 transitions. [2024-06-28 00:34:13,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 541 flow [2024-06-28 00:34:13,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 539 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:13,014 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 393 flow [2024-06-28 00:34:13,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-28 00:34:13,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-28 00:34:13,017 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 393 flow [2024-06-28 00:34:13,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:13,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:13,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:13,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:34:13,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:13,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:13,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1608307455, now seen corresponding path program 1 times [2024-06-28 00:34:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:13,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306379257] [2024-06-28 00:34:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306379257] [2024-06-28 00:34:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306379257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908068565] [2024-06-28 00:34:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:14,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:14,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:14,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:14,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:14,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:15,828 INFO L124 PetriNetUnfolderBase]: 1454/2218 cut-off events. [2024-06-28 00:34:15,828 INFO L125 PetriNetUnfolderBase]: For 6468/6470 co-relation queries the response was YES. [2024-06-28 00:34:15,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8030 conditions, 2218 events. 1454/2218 cut-off events. For 6468/6470 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10558 event pairs, 540 based on Foata normal form. 2/2219 useless extension candidates. Maximal degree in co-relation 7999. Up to 2004 conditions per place. [2024-06-28 00:34:15,853 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 28 changer transitions 0/112 dead transitions. [2024-06-28 00:34:15,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 854 flow [2024-06-28 00:34:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:34:15,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-28 00:34:15,855 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 393 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:34:15,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 854 flow [2024-06-28 00:34:15,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 838 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:15,862 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 555 flow [2024-06-28 00:34:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-28 00:34:15,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-28 00:34:15,864 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 555 flow [2024-06-28 00:34:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:15,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:15,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:15,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:34:15,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:15,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2064169339, now seen corresponding path program 2 times [2024-06-28 00:34:15,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:15,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076246343] [2024-06-28 00:34:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:15,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076246343] [2024-06-28 00:34:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076246343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:17,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:17,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268450046] [2024-06-28 00:34:17,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:17,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:17,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:17,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:17,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:17,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:18,970 INFO L124 PetriNetUnfolderBase]: 1518/2317 cut-off events. [2024-06-28 00:34:18,971 INFO L125 PetriNetUnfolderBase]: For 9617/9621 co-relation queries the response was YES. [2024-06-28 00:34:18,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 2317 events. 1518/2317 cut-off events. For 9617/9621 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11118 event pairs, 549 based on Foata normal form. 3/2317 useless extension candidates. Maximal degree in co-relation 9336. Up to 2051 conditions per place. [2024-06-28 00:34:18,984 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-28 00:34:18,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 116 transitions, 1050 flow [2024-06-28 00:34:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-28 00:34:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-28 00:34:18,988 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 555 flow. Second operand 6 states and 121 transitions. [2024-06-28 00:34:18,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 116 transitions, 1050 flow [2024-06-28 00:34:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 983 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:18,997 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 751 flow [2024-06-28 00:34:18,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-06-28 00:34:18,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-28 00:34:18,997 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 751 flow [2024-06-28 00:34:18,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:18,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:18,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:18,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:34:18,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:18,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1911461255, now seen corresponding path program 3 times [2024-06-28 00:34:18,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:18,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84584680] [2024-06-28 00:34:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:18,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84584680] [2024-06-28 00:34:21,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84584680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:21,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:21,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255271153] [2024-06-28 00:34:21,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:21,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:21,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 751 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:21,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:21,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:21,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:22,153 INFO L124 PetriNetUnfolderBase]: 1510/2302 cut-off events. [2024-06-28 00:34:22,154 INFO L125 PetriNetUnfolderBase]: For 11610/11612 co-relation queries the response was YES. [2024-06-28 00:34:22,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9732 conditions, 2302 events. 1510/2302 cut-off events. For 11610/11612 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11001 event pairs, 553 based on Foata normal form. 3/2301 useless extension candidates. Maximal degree in co-relation 9694. Up to 2046 conditions per place. [2024-06-28 00:34:22,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 65 selfloop transitions, 47 changer transitions 0/117 dead transitions. [2024-06-28 00:34:22,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1129 flow [2024-06-28 00:34:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 00:34:22,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:34:22,169 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 751 flow. Second operand 6 states and 114 transitions. [2024-06-28 00:34:22,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1129 flow [2024-06-28 00:34:22,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 1083 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:22,177 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 869 flow [2024-06-28 00:34:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=869, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-28 00:34:22,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-28 00:34:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 869 flow [2024-06-28 00:34:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:22,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:22,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:22,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:34:22,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:22,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash -768274231, now seen corresponding path program 1 times [2024-06-28 00:34:22,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:22,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779884481] [2024-06-28 00:34:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:22,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779884481] [2024-06-28 00:34:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779884481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:24,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096986211] [2024-06-28 00:34:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:24,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:24,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:24,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:24,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 869 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:24,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:24,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:24,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:25,396 INFO L124 PetriNetUnfolderBase]: 1416/2204 cut-off events. [2024-06-28 00:34:25,396 INFO L125 PetriNetUnfolderBase]: For 14830/14872 co-relation queries the response was YES. [2024-06-28 00:34:25,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 2204 events. 1416/2204 cut-off events. For 14830/14872 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11014 event pairs, 715 based on Foata normal form. 8/2176 useless extension candidates. Maximal degree in co-relation 9732. Up to 2068 conditions per place. [2024-06-28 00:34:25,410 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 84 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2024-06-28 00:34:25,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 1101 flow [2024-06-28 00:34:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 00:34:25,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-28 00:34:25,413 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 869 flow. Second operand 5 states and 97 transitions. [2024-06-28 00:34:25,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 1101 flow [2024-06-28 00:34:25,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 1037 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:25,428 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 845 flow [2024-06-28 00:34:25,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-28 00:34:25,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-28 00:34:25,429 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 845 flow [2024-06-28 00:34:25,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:25,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:25,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:34:25,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:25,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1682078059, now seen corresponding path program 1 times [2024-06-28 00:34:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475863476] [2024-06-28 00:34:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475863476] [2024-06-28 00:34:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475863476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:27,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859273040] [2024-06-28 00:34:27,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:27,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:27,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 845 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:27,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:27,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:27,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:28,090 INFO L124 PetriNetUnfolderBase]: 1509/2309 cut-off events. [2024-06-28 00:34:28,091 INFO L125 PetriNetUnfolderBase]: For 15936/15940 co-relation queries the response was YES. [2024-06-28 00:34:28,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10117 conditions, 2309 events. 1509/2309 cut-off events. For 15936/15940 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11046 event pairs, 541 based on Foata normal form. 5/2313 useless extension candidates. Maximal degree in co-relation 10072. Up to 2046 conditions per place. [2024-06-28 00:34:28,102 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 51 changer transitions 0/135 dead transitions. [2024-06-28 00:34:28,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1346 flow [2024-06-28 00:34:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:34:28,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 00:34:28,105 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 845 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:34:28,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1346 flow [2024-06-28 00:34:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:28,118 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 1048 flow [2024-06-28 00:34:28,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1048, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2024-06-28 00:34:28,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-28 00:34:28,119 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 1048 flow [2024-06-28 00:34:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:28,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:28,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:28,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:34:28,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:28,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -419184269, now seen corresponding path program 2 times [2024-06-28 00:34:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:28,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248932929] [2024-06-28 00:34:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:30,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248932929] [2024-06-28 00:34:30,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248932929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:30,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:30,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174634125] [2024-06-28 00:34:30,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:30,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:30,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 1048 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:31,279 INFO L124 PetriNetUnfolderBase]: 1531/2346 cut-off events. [2024-06-28 00:34:31,280 INFO L125 PetriNetUnfolderBase]: For 19529/19535 co-relation queries the response was YES. [2024-06-28 00:34:31,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2346 events. 1531/2346 cut-off events. For 19529/19535 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11235 event pairs, 545 based on Foata normal form. 4/2347 useless extension candidates. Maximal degree in co-relation 10887. Up to 2060 conditions per place. [2024-06-28 00:34:31,294 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 56 changer transitions 0/132 dead transitions. [2024-06-28 00:34:31,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 1533 flow [2024-06-28 00:34:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-28 00:34:31,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-28 00:34:31,310 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 1048 flow. Second operand 6 states and 121 transitions. [2024-06-28 00:34:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 1533 flow [2024-06-28 00:34:31,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 1438 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:31,327 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 1161 flow [2024-06-28 00:34:31,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-28 00:34:31,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-28 00:34:31,328 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 1161 flow [2024-06-28 00:34:31,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:31,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:31,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:31,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:34:31,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:31,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1911289059, now seen corresponding path program 3 times [2024-06-28 00:34:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442245473] [2024-06-28 00:34:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:33,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442245473] [2024-06-28 00:34:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442245473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:33,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198176474] [2024-06-28 00:34:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:33,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:33,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:33,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:33,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 1161 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:33,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:33,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:33,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:34,303 INFO L124 PetriNetUnfolderBase]: 1523/2330 cut-off events. [2024-06-28 00:34:34,304 INFO L125 PetriNetUnfolderBase]: For 22471/22483 co-relation queries the response was YES. [2024-06-28 00:34:34,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11178 conditions, 2330 events. 1523/2330 cut-off events. For 22471/22483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11175 event pairs, 553 based on Foata normal form. 15/2341 useless extension candidates. Maximal degree in co-relation 11128. Up to 2055 conditions per place. [2024-06-28 00:34:34,336 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 62 changer transitions 0/134 dead transitions. [2024-06-28 00:34:34,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1601 flow [2024-06-28 00:34:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 00:34:34,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:34:34,342 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 1161 flow. Second operand 6 states and 114 transitions. [2024-06-28 00:34:34,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1601 flow [2024-06-28 00:34:34,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1519 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:34,362 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1285 flow [2024-06-28 00:34:34,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1285, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2024-06-28 00:34:34,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 00:34:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1285 flow [2024-06-28 00:34:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2024-06-28 00:34:34,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:34,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:34:34,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1911298979, now seen corresponding path program 1 times [2024-06-28 00:34:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:34,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844327282] [2024-06-28 00:34:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:34,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:37,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844327282] [2024-06-28 00:34:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844327282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:37,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851430251] [2024-06-28 00:34:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:37,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:37,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1285 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:37,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:37,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:37,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:38,146 INFO L124 PetriNetUnfolderBase]: 1426/2226 cut-off events. [2024-06-28 00:34:38,146 INFO L125 PetriNetUnfolderBase]: For 26060/26102 co-relation queries the response was YES. [2024-06-28 00:34:38,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 2226 events. 1426/2226 cut-off events. For 26060/26102 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11067 event pairs, 680 based on Foata normal form. 10/2201 useless extension candidates. Maximal degree in co-relation 11174. Up to 2061 conditions per place. [2024-06-28 00:34:38,184 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/134 dead transitions. [2024-06-28 00:34:38,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1603 flow [2024-06-28 00:34:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 00:34:38,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-28 00:34:38,186 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1285 flow. Second operand 7 states and 123 transitions. [2024-06-28 00:34:38,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1603 flow [2024-06-28 00:34:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 1529 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:38,214 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 1272 flow [2024-06-28 00:34:38,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1272, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-06-28 00:34:38,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-28 00:34:38,215 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 1272 flow [2024-06-28 00:34:38,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:38,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:38,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:38,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:34:38,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:38,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1707520640, now seen corresponding path program 1 times [2024-06-28 00:34:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729816002] [2024-06-28 00:34:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:40,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729816002] [2024-06-28 00:34:40,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729816002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:40,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:40,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:40,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097039772] [2024-06-28 00:34:40,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:40,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:40,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 1272 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) [2024-06-28 00:34:40,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:40,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:40,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:41,900 INFO L124 PetriNetUnfolderBase]: 1637/2514 cut-off events. [2024-06-28 00:34:41,901 INFO L125 PetriNetUnfolderBase]: For 27516/27516 co-relation queries the response was YES. [2024-06-28 00:34:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12494 conditions, 2514 events. 1637/2514 cut-off events. For 27516/27516 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12253 event pairs, 425 based on Foata normal form. 3/2516 useless extension candidates. Maximal degree in co-relation 12439. Up to 2283 conditions per place. [2024-06-28 00:34:41,947 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 139 selfloop transitions, 39 changer transitions 0/183 dead transitions. [2024-06-28 00:34:41,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 183 transitions, 2072 flow [2024-06-28 00:34:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 00:34:41,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-28 00:34:41,949 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 1272 flow. Second operand 9 states and 176 transitions. [2024-06-28 00:34:41,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 183 transitions, 2072 flow [2024-06-28 00:34:41,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 183 transitions, 2021 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:42,000 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1500 flow [2024-06-28 00:34:42,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1500, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-28 00:34:42,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-28 00:34:42,020 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1500 flow [2024-06-28 00:34:42,020 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) [2024-06-28 00:34:42,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:42,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:42,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:34:42,021 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:42,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash -683057954, now seen corresponding path program 2 times [2024-06-28 00:34:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:42,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629815591] [2024-06-28 00:34:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:42,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629815591] [2024-06-28 00:34:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629815591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:44,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:44,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660547472] [2024-06-28 00:34:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:44,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:44,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:44,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1500 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) [2024-06-28 00:34:44,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:44,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:44,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:45,930 INFO L124 PetriNetUnfolderBase]: 1787/2729 cut-off events. [2024-06-28 00:34:45,930 INFO L125 PetriNetUnfolderBase]: For 35375/35377 co-relation queries the response was YES. [2024-06-28 00:34:45,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14738 conditions, 2729 events. 1787/2729 cut-off events. For 35375/35377 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13603 event pairs, 486 based on Foata normal form. 3/2730 useless extension candidates. Maximal degree in co-relation 14680. Up to 1927 conditions per place. [2024-06-28 00:34:45,993 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 142 selfloop transitions, 58 changer transitions 0/205 dead transitions. [2024-06-28 00:34:45,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 205 transitions, 2516 flow [2024-06-28 00:34:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:34:45,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-28 00:34:45,995 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1500 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:34:45,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 205 transitions, 2516 flow [2024-06-28 00:34:46,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 205 transitions, 2471 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:46,025 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1775 flow [2024-06-28 00:34:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-28 00:34:46,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-28 00:34:46,026 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1775 flow [2024-06-28 00:34:46,026 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) [2024-06-28 00:34:46,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:46,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:46,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:34:46,027 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:46,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -902348258, now seen corresponding path program 3 times [2024-06-28 00:34:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527162042] [2024-06-28 00:34:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:46,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527162042] [2024-06-28 00:34:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527162042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:47,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:47,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881932504] [2024-06-28 00:34:47,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:47,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:47,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:47,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1775 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) [2024-06-28 00:34:47,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:47,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:47,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:48,627 INFO L124 PetriNetUnfolderBase]: 1991/3038 cut-off events. [2024-06-28 00:34:48,628 INFO L125 PetriNetUnfolderBase]: For 44661/44661 co-relation queries the response was YES. [2024-06-28 00:34:48,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 3038 events. 1991/3038 cut-off events. For 44661/44661 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15109 event pairs, 490 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 18078. Up to 2666 conditions per place. [2024-06-28 00:34:48,651 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 174 selfloop transitions, 58 changer transitions 0/237 dead transitions. [2024-06-28 00:34:48,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 237 transitions, 2980 flow [2024-06-28 00:34:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:34:48,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 00:34:48,653 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1775 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:34:48,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 237 transitions, 2980 flow [2024-06-28 00:34:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 237 transitions, 2917 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:48,702 INFO L231 Difference]: Finished difference. Result has 124 places, 188 transitions, 2308 flow [2024-06-28 00:34:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2308, PETRI_PLACES=124, PETRI_TRANSITIONS=188} [2024-06-28 00:34:48,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-28 00:34:48,702 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 188 transitions, 2308 flow [2024-06-28 00:34:48,703 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) [2024-06-28 00:34:48,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:48,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:34:48,703 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:48,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2128781348, now seen corresponding path program 1 times [2024-06-28 00:34:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578850176] [2024-06-28 00:34:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:50,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578850176] [2024-06-28 00:34:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578850176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:50,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:50,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235455980] [2024-06-28 00:34:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:50,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:50,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 188 transitions, 2308 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) [2024-06-28 00:34:50,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:50,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:50,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:51,821 INFO L124 PetriNetUnfolderBase]: 1995/3053 cut-off events. [2024-06-28 00:34:51,821 INFO L125 PetriNetUnfolderBase]: For 51919/51925 co-relation queries the response was YES. [2024-06-28 00:34:51,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19101 conditions, 3053 events. 1995/3053 cut-off events. For 51919/51925 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15241 event pairs, 551 based on Foata normal form. 7/3059 useless extension candidates. Maximal degree in co-relation 19034. Up to 2727 conditions per place. [2024-06-28 00:34:51,843 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 62 changer transitions 0/223 dead transitions. [2024-06-28 00:34:51,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 223 transitions, 3007 flow [2024-06-28 00:34:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:34:51,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 00:34:51,845 INFO L175 Difference]: Start difference. First operand has 124 places, 188 transitions, 2308 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:34:51,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 223 transitions, 3007 flow [2024-06-28 00:34:51,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 223 transitions, 2940 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:51,895 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2426 flow [2024-06-28 00:34:51,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-28 00:34:51,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-28 00:34:51,896 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2426 flow [2024-06-28 00:34:51,896 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) [2024-06-28 00:34:51,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:51,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:34:51,896 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash -114577352, now seen corresponding path program 4 times [2024-06-28 00:34:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210148544] [2024-06-28 00:34:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:54,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:54,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210148544] [2024-06-28 00:34:54,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210148544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:54,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:54,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:54,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647432084] [2024-06-28 00:34:54,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:54,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:54,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:54,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:54,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:54,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:54,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2426 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) [2024-06-28 00:34:54,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:54,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:54,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:56,335 INFO L124 PetriNetUnfolderBase]: 2158/3267 cut-off events. [2024-06-28 00:34:56,336 INFO L125 PetriNetUnfolderBase]: For 57552/57552 co-relation queries the response was YES. [2024-06-28 00:34:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21063 conditions, 3267 events. 2158/3267 cut-off events. For 57552/57552 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16238 event pairs, 509 based on Foata normal form. 5/3267 useless extension candidates. Maximal degree in co-relation 20994. Up to 2913 conditions per place. [2024-06-28 00:34:56,357 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 186 selfloop transitions, 86 changer transitions 0/277 dead transitions. [2024-06-28 00:34:56,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 277 transitions, 3864 flow [2024-06-28 00:34:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:34:56,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 00:34:56,359 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2426 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:34:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 277 transitions, 3864 flow [2024-06-28 00:34:56,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 277 transitions, 3764 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:56,416 INFO L231 Difference]: Finished difference. Result has 135 places, 239 transitions, 3210 flow [2024-06-28 00:34:56,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=135, PETRI_TRANSITIONS=239} [2024-06-28 00:34:56,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-28 00:34:56,417 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 239 transitions, 3210 flow [2024-06-28 00:34:56,417 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) [2024-06-28 00:34:56,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:56,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:56,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:34:56,417 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:56,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2114271284, now seen corresponding path program 5 times [2024-06-28 00:34:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:56,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896027160] [2024-06-28 00:34:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896027160] [2024-06-28 00:34:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896027160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:59,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:59,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634641519] [2024-06-28 00:34:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:59,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:59,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 239 transitions, 3210 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) [2024-06-28 00:34:59,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:59,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:59,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:01,356 INFO L124 PetriNetUnfolderBase]: 2338/3545 cut-off events. [2024-06-28 00:35:01,356 INFO L125 PetriNetUnfolderBase]: For 71254/71260 co-relation queries the response was YES. [2024-06-28 00:35:01,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24097 conditions, 3545 events. 2338/3545 cut-off events. For 71254/71260 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18183 event pairs, 589 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 24025. Up to 2269 conditions per place. [2024-06-28 00:35:01,388 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 163 selfloop transitions, 140 changer transitions 0/308 dead transitions. [2024-06-28 00:35:01,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 308 transitions, 4636 flow [2024-06-28 00:35:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:35:01,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-28 00:35:01,390 INFO L175 Difference]: Start difference. First operand has 135 places, 239 transitions, 3210 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:35:01,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 308 transitions, 4636 flow [2024-06-28 00:35:01,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 308 transitions, 4540 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:01,478 INFO L231 Difference]: Finished difference. Result has 141 places, 266 transitions, 3811 flow [2024-06-28 00:35:01,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3811, PETRI_PLACES=141, PETRI_TRANSITIONS=266} [2024-06-28 00:35:01,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-28 00:35:01,479 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 266 transitions, 3811 flow [2024-06-28 00:35:01,479 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) [2024-06-28 00:35:01,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:01,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:01,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:35:01,480 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:01,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1331781304, now seen corresponding path program 6 times [2024-06-28 00:35:01,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:01,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754484955] [2024-06-28 00:35:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:01,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:04,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:04,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754484955] [2024-06-28 00:35:04,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754484955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:04,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:04,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:04,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506270694] [2024-06-28 00:35:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:04,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:04,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:04,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:04,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 266 transitions, 3811 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) [2024-06-28 00:35:04,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:04,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:05,701 INFO L124 PetriNetUnfolderBase]: 2328/3518 cut-off events. [2024-06-28 00:35:05,701 INFO L125 PetriNetUnfolderBase]: For 80623/80625 co-relation queries the response was YES. [2024-06-28 00:35:05,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25322 conditions, 3518 events. 2328/3518 cut-off events. For 80623/80625 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17946 event pairs, 618 based on Foata normal form. 5/3515 useless extension candidates. Maximal degree in co-relation 25246. Up to 2266 conditions per place. [2024-06-28 00:35:05,731 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 150 selfloop transitions, 159 changer transitions 0/314 dead transitions. [2024-06-28 00:35:05,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 314 transitions, 5016 flow [2024-06-28 00:35:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:35:05,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-28 00:35:05,733 INFO L175 Difference]: Start difference. First operand has 141 places, 266 transitions, 3811 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:35:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 314 transitions, 5016 flow [2024-06-28 00:35:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 314 transitions, 4866 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:05,837 INFO L231 Difference]: Finished difference. Result has 148 places, 278 transitions, 4286 flow [2024-06-28 00:35:05,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=148, PETRI_TRANSITIONS=278} [2024-06-28 00:35:05,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-28 00:35:05,838 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 278 transitions, 4286 flow [2024-06-28 00:35:05,838 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) [2024-06-28 00:35:05,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:05,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:35:05,838 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:05,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1754544810, now seen corresponding path program 2 times [2024-06-28 00:35:05,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575301549] [2024-06-28 00:35:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:08,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575301549] [2024-06-28 00:35:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575301549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548592448] [2024-06-28 00:35:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:08,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:08,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:08,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 278 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:08,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:08,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:10,102 INFO L124 PetriNetUnfolderBase]: 2350/3577 cut-off events. [2024-06-28 00:35:10,102 INFO L125 PetriNetUnfolderBase]: For 92381/92387 co-relation queries the response was YES. [2024-06-28 00:35:10,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26516 conditions, 3577 events. 2350/3577 cut-off events. For 92381/92387 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18459 event pairs, 598 based on Foata normal form. 4/3578 useless extension candidates. Maximal degree in co-relation 26435. Up to 3220 conditions per place. [2024-06-28 00:35:10,134 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 69 changer transitions 0/310 dead transitions. [2024-06-28 00:35:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 310 transitions, 5161 flow [2024-06-28 00:35:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:35:10,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 00:35:10,143 INFO L175 Difference]: Start difference. First operand has 148 places, 278 transitions, 4286 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:35:10,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 310 transitions, 5161 flow [2024-06-28 00:35:10,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 310 transitions, 5096 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:10,268 INFO L231 Difference]: Finished difference. Result has 154 places, 284 transitions, 4472 flow [2024-06-28 00:35:10,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4472, PETRI_PLACES=154, PETRI_TRANSITIONS=284} [2024-06-28 00:35:10,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-28 00:35:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 284 transitions, 4472 flow [2024-06-28 00:35:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:10,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:10,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:10,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:35:10,271 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:10,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -879579672, now seen corresponding path program 3 times [2024-06-28 00:35:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2663431] [2024-06-28 00:35:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:12,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2663431] [2024-06-28 00:35:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2663431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173145201] [2024-06-28 00:35:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:12,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:12,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 284 transitions, 4472 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) [2024-06-28 00:35:12,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:12,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:12,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:14,152 INFO L124 PetriNetUnfolderBase]: 2342/3563 cut-off events. [2024-06-28 00:35:14,152 INFO L125 PetriNetUnfolderBase]: For 97453/97465 co-relation queries the response was YES. [2024-06-28 00:35:14,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26760 conditions, 3563 events. 2342/3563 cut-off events. For 97453/97465 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18350 event pairs, 591 based on Foata normal form. 15/3574 useless extension candidates. Maximal degree in co-relation 26675. Up to 3212 conditions per place. [2024-06-28 00:35:14,180 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 231 selfloop transitions, 67 changer transitions 0/303 dead transitions. [2024-06-28 00:35:14,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 303 transitions, 5152 flow [2024-06-28 00:35:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 00:35:14,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-28 00:35:14,182 INFO L175 Difference]: Start difference. First operand has 154 places, 284 transitions, 4472 flow. Second operand 6 states and 113 transitions. [2024-06-28 00:35:14,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 303 transitions, 5152 flow [2024-06-28 00:35:14,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 303 transitions, 5020 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:14,302 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 4492 flow [2024-06-28 00:35:14,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4492, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-28 00:35:14,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-28 00:35:14,303 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 4492 flow [2024-06-28 00:35:14,303 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) [2024-06-28 00:35:14,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:14,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:14,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:35:14,304 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:14,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 567601714, now seen corresponding path program 1 times [2024-06-28 00:35:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:14,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197739899] [2024-06-28 00:35:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:14,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:16,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197739899] [2024-06-28 00:35:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197739899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:16,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:16,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:35:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146591051] [2024-06-28 00:35:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:16,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:35:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:35:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:35:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:35:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 4492 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:35:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:17,532 INFO L124 PetriNetUnfolderBase]: 2272/3482 cut-off events. [2024-06-28 00:35:17,532 INFO L125 PetriNetUnfolderBase]: For 104358/104419 co-relation queries the response was YES. [2024-06-28 00:35:17,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26567 conditions, 3482 events. 2272/3482 cut-off events. For 104358/104419 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18246 event pairs, 798 based on Foata normal form. 13/3442 useless extension candidates. Maximal degree in co-relation 26480. Up to 3188 conditions per place. [2024-06-28 00:35:17,564 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 237 selfloop transitions, 12 changer transitions 0/297 dead transitions. [2024-06-28 00:35:17,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 297 transitions, 5046 flow [2024-06-28 00:35:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-28 00:35:17,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 00:35:17,565 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 4492 flow. Second operand 5 states and 91 transitions. [2024-06-28 00:35:17,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 297 transitions, 5046 flow [2024-06-28 00:35:17,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 297 transitions, 4973 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:17,709 INFO L231 Difference]: Finished difference. Result has 159 places, 287 transitions, 4483 flow [2024-06-28 00:35:17,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4483, PETRI_PLACES=159, PETRI_TRANSITIONS=287} [2024-06-28 00:35:17,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-28 00:35:17,710 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 287 transitions, 4483 flow [2024-06-28 00:35:17,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:17,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:17,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:35:17,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:17,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1393533900, now seen corresponding path program 1 times [2024-06-28 00:35:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759986979] [2024-06-28 00:35:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:20,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:20,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759986979] [2024-06-28 00:35:20,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759986979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:20,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:20,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:20,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117200791] [2024-06-28 00:35:20,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:20,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:20,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:20,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:20,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:20,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 287 transitions, 4483 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:20,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:20,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:20,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:21,620 INFO L124 PetriNetUnfolderBase]: 2307/3504 cut-off events. [2024-06-28 00:35:21,620 INFO L125 PetriNetUnfolderBase]: For 102705/102705 co-relation queries the response was YES. [2024-06-28 00:35:21,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26602 conditions, 3504 events. 2307/3504 cut-off events. For 102705/102705 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17814 event pairs, 497 based on Foata normal form. 12/3515 useless extension candidates. Maximal degree in co-relation 26512. Up to 3157 conditions per place. [2024-06-28 00:35:21,647 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 245 selfloop transitions, 81 changer transitions 0/331 dead transitions. [2024-06-28 00:35:21,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 331 transitions, 5430 flow [2024-06-28 00:35:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:35:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:35:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:35:21,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 00:35:21,649 INFO L175 Difference]: Start difference. First operand has 159 places, 287 transitions, 4483 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:35:21,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 331 transitions, 5430 flow [2024-06-28 00:35:21,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 331 transitions, 5365 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:21,787 INFO L231 Difference]: Finished difference. Result has 164 places, 287 transitions, 4602 flow [2024-06-28 00:35:21,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=164, PETRI_TRANSITIONS=287} [2024-06-28 00:35:21,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-28 00:35:21,788 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 287 transitions, 4602 flow [2024-06-28 00:35:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:21,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:21,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:21,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:35:21,789 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:21,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash 300041518, now seen corresponding path program 2 times [2024-06-28 00:35:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:21,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156201509] [2024-06-28 00:35:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156201509] [2024-06-28 00:35:24,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156201509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:24,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:24,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135222702] [2024-06-28 00:35:24,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:24,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:24,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 287 transitions, 4602 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:24,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:24,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:24,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:26,524 INFO L124 PetriNetUnfolderBase]: 2379/3616 cut-off events. [2024-06-28 00:35:26,524 INFO L125 PetriNetUnfolderBase]: For 112769/112771 co-relation queries the response was YES. [2024-06-28 00:35:26,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 3616 events. 2379/3616 cut-off events. For 112769/112771 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18660 event pairs, 567 based on Foata normal form. 10/3625 useless extension candidates. Maximal degree in co-relation 27752. Up to 2312 conditions per place. [2024-06-28 00:35:26,557 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 188 selfloop transitions, 165 changer transitions 0/358 dead transitions. [2024-06-28 00:35:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 358 transitions, 6166 flow [2024-06-28 00:35:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:35:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:35:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 00:35:26,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-28 00:35:26,559 INFO L175 Difference]: Start difference. First operand has 164 places, 287 transitions, 4602 flow. Second operand 9 states and 185 transitions. [2024-06-28 00:35:26,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 358 transitions, 6166 flow [2024-06-28 00:35:26,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 358 transitions, 6034 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:26,729 INFO L231 Difference]: Finished difference. Result has 167 places, 294 transitions, 4927 flow [2024-06-28 00:35:26,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4927, PETRI_PLACES=167, PETRI_TRANSITIONS=294} [2024-06-28 00:35:26,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 00:35:26,729 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 294 transitions, 4927 flow [2024-06-28 00:35:26,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:26,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:26,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:26,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:35:26,730 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:26,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1611361384, now seen corresponding path program 3 times [2024-06-28 00:35:26,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:26,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95843770] [2024-06-28 00:35:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:29,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95843770] [2024-06-28 00:35:29,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95843770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:29,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:29,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854578428] [2024-06-28 00:35:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:29,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:29,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 294 transitions, 4927 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:29,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:29,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:29,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:30,640 INFO L124 PetriNetUnfolderBase]: 2495/3790 cut-off events. [2024-06-28 00:35:30,641 INFO L125 PetriNetUnfolderBase]: For 127878/127884 co-relation queries the response was YES. [2024-06-28 00:35:30,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 3790 events. 2495/3790 cut-off events. For 127878/127884 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19768 event pairs, 542 based on Foata normal form. 14/3803 useless extension candidates. Maximal degree in co-relation 30118. Up to 2402 conditions per place. [2024-06-28 00:35:30,674 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 171 changer transitions 0/369 dead transitions. [2024-06-28 00:35:30,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 369 transitions, 6677 flow [2024-06-28 00:35:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-28 00:35:30,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-28 00:35:30,676 INFO L175 Difference]: Start difference. First operand has 167 places, 294 transitions, 4927 flow. Second operand 8 states and 169 transitions. [2024-06-28 00:35:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 369 transitions, 6677 flow [2024-06-28 00:35:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 369 transitions, 6263 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 00:35:30,846 INFO L231 Difference]: Finished difference. Result has 170 places, 312 transitions, 5343 flow [2024-06-28 00:35:30,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5343, PETRI_PLACES=170, PETRI_TRANSITIONS=312} [2024-06-28 00:35:30,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-28 00:35:30,847 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 312 transitions, 5343 flow [2024-06-28 00:35:30,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:30,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:30,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:35:30,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:30,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2133520716, now seen corresponding path program 4 times [2024-06-28 00:35:30,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:30,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773753850] [2024-06-28 00:35:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:32,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773753850] [2024-06-28 00:35:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773753850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:32,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091019957] [2024-06-28 00:35:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:32,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:32,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:32,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 312 transitions, 5343 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:32,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:32,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:32,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:33,597 INFO L124 PetriNetUnfolderBase]: 2496/3796 cut-off events. [2024-06-28 00:35:33,597 INFO L125 PetriNetUnfolderBase]: For 130143/130143 co-relation queries the response was YES. [2024-06-28 00:35:33,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30967 conditions, 3796 events. 2496/3796 cut-off events. For 130143/130143 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19723 event pairs, 529 based on Foata normal form. 3/3798 useless extension candidates. Maximal degree in co-relation 30872. Up to 3319 conditions per place. [2024-06-28 00:35:33,629 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 270 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-28 00:35:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 371 transitions, 6810 flow [2024-06-28 00:35:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:35:33,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 00:35:33,631 INFO L175 Difference]: Start difference. First operand has 170 places, 312 transitions, 5343 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:35:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 371 transitions, 6810 flow [2024-06-28 00:35:33,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 371 transitions, 6559 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:33,796 INFO L231 Difference]: Finished difference. Result has 175 places, 320 transitions, 5471 flow [2024-06-28 00:35:33,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5471, PETRI_PLACES=175, PETRI_TRANSITIONS=320} [2024-06-28 00:35:33,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-28 00:35:33,796 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 320 transitions, 5471 flow [2024-06-28 00:35:33,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:33,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:33,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:33,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:35:33,797 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:33,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1567714022, now seen corresponding path program 1 times [2024-06-28 00:35:33,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:33,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407794041] [2024-06-28 00:35:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:33,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:36,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407794041] [2024-06-28 00:35:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407794041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:36,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:36,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297195431] [2024-06-28 00:35:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:36,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:36,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:36,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 320 transitions, 5471 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:36,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:36,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:36,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:37,927 INFO L124 PetriNetUnfolderBase]: 2516/3840 cut-off events. [2024-06-28 00:35:37,927 INFO L125 PetriNetUnfolderBase]: For 137533/137539 co-relation queries the response was YES. [2024-06-28 00:35:37,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31126 conditions, 3840 events. 2516/3840 cut-off events. For 137533/137539 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20062 event pairs, 561 based on Foata normal form. 8/3847 useless extension candidates. Maximal degree in co-relation 31029. Up to 3442 conditions per place. [2024-06-28 00:35:37,965 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 70 changer transitions 0/357 dead transitions. [2024-06-28 00:35:37,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 357 transitions, 6347 flow [2024-06-28 00:35:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:35:37,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 00:35:37,967 INFO L175 Difference]: Start difference. First operand has 175 places, 320 transitions, 5471 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:35:37,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 357 transitions, 6347 flow [2024-06-28 00:35:38,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 357 transitions, 6171 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:38,178 INFO L231 Difference]: Finished difference. Result has 178 places, 322 transitions, 5485 flow [2024-06-28 00:35:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=178, PETRI_TRANSITIONS=322} [2024-06-28 00:35:38,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-28 00:35:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 322 transitions, 5485 flow [2024-06-28 00:35:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:38,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:35:38,181 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:38,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash 743070996, now seen corresponding path program 5 times [2024-06-28 00:35:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140220818] [2024-06-28 00:35:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140220818] [2024-06-28 00:35:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140220818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:41,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538775354] [2024-06-28 00:35:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:41,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:41,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 322 transitions, 5485 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:41,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:41,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:41,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:42,609 INFO L124 PetriNetUnfolderBase]: 2489/3782 cut-off events. [2024-06-28 00:35:42,609 INFO L125 PetriNetUnfolderBase]: For 142623/142623 co-relation queries the response was YES. [2024-06-28 00:35:42,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30720 conditions, 3782 events. 2489/3782 cut-off events. For 142623/142623 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19607 event pairs, 526 based on Foata normal form. 11/3788 useless extension candidates. Maximal degree in co-relation 30622. Up to 3404 conditions per place. [2024-06-28 00:35:42,644 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 263 selfloop transitions, 91 changer transitions 0/359 dead transitions. [2024-06-28 00:35:42,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 359 transitions, 6499 flow [2024-06-28 00:35:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:35:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:35:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:35:42,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 00:35:42,645 INFO L175 Difference]: Start difference. First operand has 178 places, 322 transitions, 5485 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:35:42,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 359 transitions, 6499 flow [2024-06-28 00:35:42,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 359 transitions, 6315 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:42,845 INFO L231 Difference]: Finished difference. Result has 182 places, 322 transitions, 5514 flow [2024-06-28 00:35:42,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5514, PETRI_PLACES=182, PETRI_TRANSITIONS=322} [2024-06-28 00:35:42,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-28 00:35:42,846 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 322 transitions, 5514 flow [2024-06-28 00:35:42,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:42,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:42,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:35:42,846 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:42,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1117901976, now seen corresponding path program 6 times [2024-06-28 00:35:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077000602] [2024-06-28 00:35:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077000602] [2024-06-28 00:35:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077000602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740539070] [2024-06-28 00:35:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:46,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:46,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 322 transitions, 5514 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:46,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:46,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:46,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:47,929 INFO L124 PetriNetUnfolderBase]: 2579/3923 cut-off events. [2024-06-28 00:35:47,929 INFO L125 PetriNetUnfolderBase]: For 154219/154225 co-relation queries the response was YES. [2024-06-28 00:35:47,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31995 conditions, 3923 events. 2579/3923 cut-off events. For 154219/154225 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20625 event pairs, 635 based on Foata normal form. 13/3931 useless extension candidates. Maximal degree in co-relation 31896. Up to 2491 conditions per place. [2024-06-28 00:35:47,966 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 183 changer transitions 0/379 dead transitions. [2024-06-28 00:35:47,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 379 transitions, 7051 flow [2024-06-28 00:35:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:35:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:35:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:35:47,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:35:47,968 INFO L175 Difference]: Start difference. First operand has 182 places, 322 transitions, 5514 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:35:47,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 379 transitions, 7051 flow [2024-06-28 00:35:48,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 379 transitions, 6892 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 00:35:48,170 INFO L231 Difference]: Finished difference. Result has 184 places, 332 transitions, 5907 flow [2024-06-28 00:35:48,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5907, PETRI_PLACES=184, PETRI_TRANSITIONS=332} [2024-06-28 00:35:48,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-28 00:35:48,172 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 332 transitions, 5907 flow [2024-06-28 00:35:48,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:48,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:48,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:48,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:35:48,172 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:48,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1118109366, now seen corresponding path program 7 times [2024-06-28 00:35:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324296030] [2024-06-28 00:35:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324296030] [2024-06-28 00:35:50,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324296030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:50,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310154016] [2024-06-28 00:35:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:50,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:50,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 332 transitions, 5907 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:50,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:50,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:50,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:52,588 INFO L124 PetriNetUnfolderBase]: 2775/4227 cut-off events. [2024-06-28 00:35:52,589 INFO L125 PetriNetUnfolderBase]: For 178367/178373 co-relation queries the response was YES. [2024-06-28 00:35:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 4227 events. 2775/4227 cut-off events. For 178367/178373 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22630 event pairs, 636 based on Foata normal form. 11/4233 useless extension candidates. Maximal degree in co-relation 35815. Up to 2638 conditions per place. [2024-06-28 00:35:52,635 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 194 changer transitions 0/391 dead transitions. [2024-06-28 00:35:52,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 391 transitions, 7660 flow [2024-06-28 00:35:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-28 00:35:52,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-28 00:35:52,637 INFO L175 Difference]: Start difference. First operand has 184 places, 332 transitions, 5907 flow. Second operand 7 states and 149 transitions. [2024-06-28 00:35:52,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 391 transitions, 7660 flow [2024-06-28 00:35:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 391 transitions, 7216 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:52,897 INFO L231 Difference]: Finished difference. Result has 186 places, 347 transitions, 6230 flow [2024-06-28 00:35:52,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6230, PETRI_PLACES=186, PETRI_TRANSITIONS=347} [2024-06-28 00:35:52,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-28 00:35:52,899 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 347 transitions, 6230 flow [2024-06-28 00:35:52,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:52,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:52,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:52,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:35:52,899 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:52,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1429872314, now seen corresponding path program 8 times [2024-06-28 00:35:52,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:52,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713033550] [2024-06-28 00:35:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:52,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:55,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713033550] [2024-06-28 00:35:55,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713033550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:55,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:55,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:55,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312736714] [2024-06-28 00:35:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:55,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:55,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:55,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 347 transitions, 6230 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:55,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:55,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:55,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:57,039 INFO L124 PetriNetUnfolderBase]: 2755/4190 cut-off events. [2024-06-28 00:35:57,039 INFO L125 PetriNetUnfolderBase]: For 182048/182060 co-relation queries the response was YES. [2024-06-28 00:35:57,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35863 conditions, 4190 events. 2755/4190 cut-off events. For 182048/182060 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22429 event pairs, 601 based on Foata normal form. 22/4204 useless extension candidates. Maximal degree in co-relation 35761. Up to 2629 conditions per place. [2024-06-28 00:35:57,083 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 198 changer transitions 0/390 dead transitions. [2024-06-28 00:35:57,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 390 transitions, 7642 flow [2024-06-28 00:35:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:35:57,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 00:35:57,085 INFO L175 Difference]: Start difference. First operand has 186 places, 347 transitions, 6230 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:35:57,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 390 transitions, 7642 flow [2024-06-28 00:35:57,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 390 transitions, 7385 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:57,414 INFO L231 Difference]: Finished difference. Result has 191 places, 352 transitions, 6502 flow [2024-06-28 00:35:57,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6502, PETRI_PLACES=191, PETRI_TRANSITIONS=352} [2024-06-28 00:35:57,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-28 00:35:57,414 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 352 transitions, 6502 flow [2024-06-28 00:35:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:57,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:57,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:35:57,415 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1437229544, now seen corresponding path program 9 times [2024-06-28 00:35:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:57,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666966513] [2024-06-28 00:35:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666966513] [2024-06-28 00:36:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666966513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:00,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:00,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528569139] [2024-06-28 00:36:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:00,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:00,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 352 transitions, 6502 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:00,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:00,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:00,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:02,683 INFO L124 PetriNetUnfolderBase]: 2761/4206 cut-off events. [2024-06-28 00:36:02,684 INFO L125 PetriNetUnfolderBase]: For 193120/193122 co-relation queries the response was YES. [2024-06-28 00:36:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36204 conditions, 4206 events. 2761/4206 cut-off events. For 193120/193122 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22512 event pairs, 702 based on Foata normal form. 12/4210 useless extension candidates. Maximal degree in co-relation 36098. Up to 2647 conditions per place. [2024-06-28 00:36:02,728 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 177 selfloop transitions, 220 changer transitions 0/402 dead transitions. [2024-06-28 00:36:02,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 402 transitions, 8025 flow [2024-06-28 00:36:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:36:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:36:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:36:02,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 00:36:02,730 INFO L175 Difference]: Start difference. First operand has 191 places, 352 transitions, 6502 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:36:02,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 402 transitions, 8025 flow [2024-06-28 00:36:03,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 7708 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:03,042 INFO L231 Difference]: Finished difference. Result has 197 places, 361 transitions, 6831 flow [2024-06-28 00:36:03,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6193, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=197, PETRI_TRANSITIONS=361} [2024-06-28 00:36:03,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-28 00:36:03,043 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 361 transitions, 6831 flow [2024-06-28 00:36:03,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:03,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:03,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:03,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:36:03,044 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:03,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1443684064, now seen corresponding path program 2 times [2024-06-28 00:36:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646104256] [2024-06-28 00:36:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:06,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:06,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646104256] [2024-06-28 00:36:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646104256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:06,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:06,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809061213] [2024-06-28 00:36:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:06,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:06,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:06,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 361 transitions, 6831 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:06,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:06,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:07,650 INFO L124 PetriNetUnfolderBase]: 2795/4281 cut-off events. [2024-06-28 00:36:07,651 INFO L125 PetriNetUnfolderBase]: For 205157/205163 co-relation queries the response was YES. [2024-06-28 00:36:07,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36642 conditions, 4281 events. 2795/4281 cut-off events. For 205157/205163 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22982 event pairs, 589 based on Foata normal form. 5/4283 useless extension candidates. Maximal degree in co-relation 36535. Up to 3838 conditions per place. [2024-06-28 00:36:07,697 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 71 changer transitions 0/390 dead transitions. [2024-06-28 00:36:07,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 390 transitions, 7752 flow [2024-06-28 00:36:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:36:07,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 00:36:07,699 INFO L175 Difference]: Start difference. First operand has 197 places, 361 transitions, 6831 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:36:07,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 390 transitions, 7752 flow [2024-06-28 00:36:08,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 390 transitions, 7118 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-28 00:36:08,074 INFO L231 Difference]: Finished difference. Result has 198 places, 365 transitions, 6418 flow [2024-06-28 00:36:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6197, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=198, PETRI_TRANSITIONS=365} [2024-06-28 00:36:08,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-28 00:36:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 365 transitions, 6418 flow [2024-06-28 00:36:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:36:08,075 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1657085758, now seen corresponding path program 3 times [2024-06-28 00:36:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353934654] [2024-06-28 00:36:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:11,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353934654] [2024-06-28 00:36:11,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353934654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:11,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:11,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886221794] [2024-06-28 00:36:11,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:11,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:11,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:11,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 365 transitions, 6418 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:11,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:11,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:11,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:12,886 INFO L124 PetriNetUnfolderBase]: 2815/4315 cut-off events. [2024-06-28 00:36:12,886 INFO L125 PetriNetUnfolderBase]: For 202690/202702 co-relation queries the response was YES. [2024-06-28 00:36:12,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35870 conditions, 4315 events. 2815/4315 cut-off events. For 202690/202702 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23285 event pairs, 591 based on Foata normal form. 16/4327 useless extension candidates. Maximal degree in co-relation 35763. Up to 3884 conditions per place. [2024-06-28 00:36:12,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 318 selfloop transitions, 69 changer transitions 0/392 dead transitions. [2024-06-28 00:36:12,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 392 transitions, 7356 flow [2024-06-28 00:36:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:36:12,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 00:36:12,928 INFO L175 Difference]: Start difference. First operand has 198 places, 365 transitions, 6418 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:36:12,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 392 transitions, 7356 flow [2024-06-28 00:36:13,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 392 transitions, 7105 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 00:36:13,215 INFO L231 Difference]: Finished difference. Result has 198 places, 367 transitions, 6371 flow [2024-06-28 00:36:13,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6167, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6371, PETRI_PLACES=198, PETRI_TRANSITIONS=367} [2024-06-28 00:36:13,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-28 00:36:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 367 transitions, 6371 flow [2024-06-28 00:36:13,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:13,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:13,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:36:13,217 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:13,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1487641182, now seen corresponding path program 4 times [2024-06-28 00:36:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882031920] [2024-06-28 00:36:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882031920] [2024-06-28 00:36:16,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882031920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:16,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:16,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049822055] [2024-06-28 00:36:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:16,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:16,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:16,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:16,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 367 transitions, 6371 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:16,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:16,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:16,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:17,878 INFO L124 PetriNetUnfolderBase]: 2807/4311 cut-off events. [2024-06-28 00:36:17,879 INFO L125 PetriNetUnfolderBase]: For 206198/206210 co-relation queries the response was YES. [2024-06-28 00:36:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35806 conditions, 4311 events. 2807/4311 cut-off events. For 206198/206210 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23301 event pairs, 551 based on Foata normal form. 16/4323 useless extension candidates. Maximal degree in co-relation 35699. Up to 3760 conditions per place. [2024-06-28 00:36:17,921 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 77 changer transitions 0/395 dead transitions. [2024-06-28 00:36:17,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 395 transitions, 7316 flow [2024-06-28 00:36:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:36:17,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 00:36:17,927 INFO L175 Difference]: Start difference. First operand has 198 places, 367 transitions, 6371 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:36:17,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 395 transitions, 7316 flow [2024-06-28 00:36:18,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 395 transitions, 7132 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:18,252 INFO L231 Difference]: Finished difference. Result has 200 places, 369 transitions, 6410 flow [2024-06-28 00:36:18,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6410, PETRI_PLACES=200, PETRI_TRANSITIONS=369} [2024-06-28 00:36:18,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-28 00:36:18,266 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 369 transitions, 6410 flow [2024-06-28 00:36:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:18,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:36:18,267 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:18,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1149414295, now seen corresponding path program 1 times [2024-06-28 00:36:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:18,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010552463] [2024-06-28 00:36:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:21,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:21,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010552463] [2024-06-28 00:36:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010552463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:21,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140215266] [2024-06-28 00:36:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:21,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 369 transitions, 6410 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:21,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:21,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:21,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:23,095 INFO L124 PetriNetUnfolderBase]: 3095/4777 cut-off events. [2024-06-28 00:36:23,096 INFO L125 PetriNetUnfolderBase]: For 243556/243556 co-relation queries the response was YES. [2024-06-28 00:36:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39924 conditions, 4777 events. 3095/4777 cut-off events. For 243556/243556 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26588 event pairs, 537 based on Foata normal form. 6/4782 useless extension candidates. Maximal degree in co-relation 39817. Up to 3864 conditions per place. [2024-06-28 00:36:23,150 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 345 selfloop transitions, 87 changer transitions 0/437 dead transitions. [2024-06-28 00:36:23,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 437 transitions, 7983 flow [2024-06-28 00:36:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 00:36:23,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 00:36:23,152 INFO L175 Difference]: Start difference. First operand has 200 places, 369 transitions, 6410 flow. Second operand 10 states and 200 transitions. [2024-06-28 00:36:23,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 437 transitions, 7983 flow [2024-06-28 00:36:23,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 437 transitions, 7780 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:23,520 INFO L231 Difference]: Finished difference. Result has 205 places, 376 transitions, 6542 flow [2024-06-28 00:36:23,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6207, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6542, PETRI_PLACES=205, PETRI_TRANSITIONS=376} [2024-06-28 00:36:23,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-28 00:36:23,521 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 376 transitions, 6542 flow [2024-06-28 00:36:23,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:23,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:23,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:23,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:36:23,522 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:23,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 430418845, now seen corresponding path program 2 times [2024-06-28 00:36:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164314604] [2024-06-28 00:36:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:26,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:26,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164314604] [2024-06-28 00:36:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164314604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:26,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61834051] [2024-06-28 00:36:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:26,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:26,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 376 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:26,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:26,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:26,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:28,242 INFO L124 PetriNetUnfolderBase]: 3085/4768 cut-off events. [2024-06-28 00:36:28,242 INFO L125 PetriNetUnfolderBase]: For 248081/248081 co-relation queries the response was YES. [2024-06-28 00:36:28,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40148 conditions, 4768 events. 3085/4768 cut-off events. For 248081/248081 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26466 event pairs, 568 based on Foata normal form. 6/4773 useless extension candidates. Maximal degree in co-relation 40039. Up to 4283 conditions per place. [2024-06-28 00:36:28,289 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 338 selfloop transitions, 87 changer transitions 0/430 dead transitions. [2024-06-28 00:36:28,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 430 transitions, 7853 flow [2024-06-28 00:36:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:36:28,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:36:28,293 INFO L175 Difference]: Start difference. First operand has 205 places, 376 transitions, 6542 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:36:28,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 430 transitions, 7853 flow [2024-06-28 00:36:28,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 430 transitions, 7688 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:28,698 INFO L231 Difference]: Finished difference. Result has 209 places, 379 transitions, 6642 flow [2024-06-28 00:36:28,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6383, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6642, PETRI_PLACES=209, PETRI_TRANSITIONS=379} [2024-06-28 00:36:28,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-28 00:36:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 379 transitions, 6642 flow [2024-06-28 00:36:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:36:28,701 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:28,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 711349149, now seen corresponding path program 3 times [2024-06-28 00:36:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:28,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285855706] [2024-06-28 00:36:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:31,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:31,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285855706] [2024-06-28 00:36:31,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285855706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:31,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:31,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199052064] [2024-06-28 00:36:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:31,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:31,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:31,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 379 transitions, 6642 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:31,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:31,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:31,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:33,547 INFO L124 PetriNetUnfolderBase]: 3116/4816 cut-off events. [2024-06-28 00:36:33,548 INFO L125 PetriNetUnfolderBase]: For 261914/261916 co-relation queries the response was YES. [2024-06-28 00:36:33,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40920 conditions, 4816 events. 3116/4816 cut-off events. For 261914/261916 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26912 event pairs, 647 based on Foata normal form. 6/4821 useless extension candidates. Maximal degree in co-relation 40809. Up to 3175 conditions per place. [2024-06-28 00:36:33,601 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 213 changer transitions 0/441 dead transitions. [2024-06-28 00:36:33,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 441 transitions, 8373 flow [2024-06-28 00:36:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:36:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:36:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:36:33,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-28 00:36:33,603 INFO L175 Difference]: Start difference. First operand has 209 places, 379 transitions, 6642 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:36:33,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 441 transitions, 8373 flow [2024-06-28 00:36:34,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 8154 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-28 00:36:34,049 INFO L231 Difference]: Finished difference. Result has 210 places, 381 transitions, 6899 flow [2024-06-28 00:36:34,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6899, PETRI_PLACES=210, PETRI_TRANSITIONS=381} [2024-06-28 00:36:34,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-28 00:36:34,050 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 381 transitions, 6899 flow [2024-06-28 00:36:34,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:34,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:34,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:34,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:36:34,050 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:34,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash -417429141, now seen corresponding path program 4 times [2024-06-28 00:36:34,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:34,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422404871] [2024-06-28 00:36:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:34,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422404871] [2024-06-28 00:36:35,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422404871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:35,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:35,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:35,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149308460] [2024-06-28 00:36:35,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:35,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:35,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:36,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:36,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 381 transitions, 6899 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:36,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:36,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:36,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:37,634 INFO L124 PetriNetUnfolderBase]: 3437/5346 cut-off events. [2024-06-28 00:36:37,634 INFO L125 PetriNetUnfolderBase]: For 309032/309032 co-relation queries the response was YES. [2024-06-28 00:36:37,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46476 conditions, 5346 events. 3437/5346 cut-off events. For 309032/309032 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30846 event pairs, 691 based on Foata normal form. 4/5349 useless extension candidates. Maximal degree in co-relation 46364. Up to 4272 conditions per place. [2024-06-28 00:36:37,695 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 352 selfloop transitions, 100 changer transitions 0/457 dead transitions. [2024-06-28 00:36:37,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 457 transitions, 8895 flow [2024-06-28 00:36:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:36:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:36:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 00:36:37,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-28 00:36:37,697 INFO L175 Difference]: Start difference. First operand has 210 places, 381 transitions, 6899 flow. Second operand 9 states and 184 transitions. [2024-06-28 00:36:37,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 457 transitions, 8895 flow [2024-06-28 00:36:38,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 457 transitions, 8431 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 00:36:38,190 INFO L231 Difference]: Finished difference. Result has 213 places, 390 transitions, 6870 flow [2024-06-28 00:36:38,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6870, PETRI_PLACES=213, PETRI_TRANSITIONS=390} [2024-06-28 00:36:38,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-28 00:36:38,191 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 390 transitions, 6870 flow [2024-06-28 00:36:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:38,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:38,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:36:38,192 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:38,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1714629439, now seen corresponding path program 5 times [2024-06-28 00:36:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146287466] [2024-06-28 00:36:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:40,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:40,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146287466] [2024-06-28 00:36:40,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146287466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:40,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:40,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074175298] [2024-06-28 00:36:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:40,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:40,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:40,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:40,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 390 transitions, 6870 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:40,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:40,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:40,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:41,946 INFO L124 PetriNetUnfolderBase]: 3462/5396 cut-off events. [2024-06-28 00:36:41,946 INFO L125 PetriNetUnfolderBase]: For 317417/317417 co-relation queries the response was YES. [2024-06-28 00:36:41,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46429 conditions, 5396 events. 3462/5396 cut-off events. For 317417/317417 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31375 event pairs, 785 based on Foata normal form. 4/5399 useless extension candidates. Maximal degree in co-relation 46315. Up to 4804 conditions per place. [2024-06-28 00:36:42,006 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 344 selfloop transitions, 101 changer transitions 0/450 dead transitions. [2024-06-28 00:36:42,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 450 transitions, 8526 flow [2024-06-28 00:36:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:36:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:36:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 00:36:42,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 00:36:42,008 INFO L175 Difference]: Start difference. First operand has 213 places, 390 transitions, 6870 flow. Second operand 9 states and 175 transitions. [2024-06-28 00:36:42,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 450 transitions, 8526 flow [2024-06-28 00:36:42,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 450 transitions, 8409 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:42,543 INFO L231 Difference]: Finished difference. Result has 218 places, 394 transitions, 7057 flow [2024-06-28 00:36:42,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7057, PETRI_PLACES=218, PETRI_TRANSITIONS=394} [2024-06-28 00:36:42,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-28 00:36:42,546 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 394 transitions, 7057 flow [2024-06-28 00:36:42,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:42,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:42,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:36:42,546 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 715990949, now seen corresponding path program 6 times [2024-06-28 00:36:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896708217] [2024-06-28 00:36:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896708217] [2024-06-28 00:36:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896708217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:44,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:44,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540064658] [2024-06-28 00:36:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:44,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 00:36:44,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 394 transitions, 7057 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:44,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:44,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 00:36:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:46,011 INFO L124 PetriNetUnfolderBase]: 3297/5503 cut-off events. [2024-06-28 00:36:46,011 INFO L125 PetriNetUnfolderBase]: For 370368/370546 co-relation queries the response was YES. [2024-06-28 00:36:46,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48913 conditions, 5503 events. 3297/5503 cut-off events. For 370368/370546 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35895 event pairs, 543 based on Foata normal form. 90/5528 useless extension candidates. Maximal degree in co-relation 48797. Up to 3064 conditions per place. [2024-06-28 00:36:46,077 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 93 changer transitions 0/469 dead transitions. [2024-06-28 00:36:46,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 469 transitions, 8922 flow [2024-06-28 00:36:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-28 00:36:46,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-28 00:36:46,079 INFO L175 Difference]: Start difference. First operand has 218 places, 394 transitions, 7057 flow. Second operand 8 states and 177 transitions. [2024-06-28 00:36:46,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 469 transitions, 8922 flow [2024-06-28 00:36:46,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 469 transitions, 8685 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:46,698 INFO L231 Difference]: Finished difference. Result has 222 places, 408 transitions, 7418 flow [2024-06-28 00:36:46,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7418, PETRI_PLACES=222, PETRI_TRANSITIONS=408} [2024-06-28 00:36:46,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-28 00:36:46,700 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 408 transitions, 7418 flow [2024-06-28 00:36:46,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:46,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:46,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:46,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:36:46,700 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:46,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1715989409, now seen corresponding path program 1 times [2024-06-28 00:36:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930376723] [2024-06-28 00:36:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:46,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:49,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:49,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930376723] [2024-06-28 00:36:49,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930376723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:49,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:49,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:49,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960091008] [2024-06-28 00:36:49,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:49,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:49,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:49,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:49,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 408 transitions, 7418 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:49,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:49,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:49,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:51,813 INFO L124 PetriNetUnfolderBase]: 3990/6254 cut-off events. [2024-06-28 00:36:51,813 INFO L125 PetriNetUnfolderBase]: For 411474/411474 co-relation queries the response was YES. [2024-06-28 00:36:51,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56310 conditions, 6254 events. 3990/6254 cut-off events. For 411474/411474 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37905 event pairs, 994 based on Foata normal form. 4/6257 useless extension candidates. Maximal degree in co-relation 56191. Up to 5583 conditions per place. [2024-06-28 00:36:51,883 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 320 selfloop transitions, 159 changer transitions 0/484 dead transitions. [2024-06-28 00:36:51,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 484 transitions, 9457 flow [2024-06-28 00:36:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:36:51,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-28 00:36:51,885 INFO L175 Difference]: Start difference. First operand has 222 places, 408 transitions, 7418 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:36:51,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 484 transitions, 9457 flow [2024-06-28 00:36:52,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 484 transitions, 9355 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:52,599 INFO L231 Difference]: Finished difference. Result has 229 places, 430 transitions, 8166 flow [2024-06-28 00:36:52,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8166, PETRI_PLACES=229, PETRI_TRANSITIONS=430} [2024-06-28 00:36:52,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-28 00:36:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 430 transitions, 8166 flow [2024-06-28 00:36:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:52,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:52,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:52,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:36:52,601 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:52,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1442447733, now seen corresponding path program 1 times [2024-06-28 00:36:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:52,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756876935] [2024-06-28 00:36:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:54,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756876935] [2024-06-28 00:36:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756876935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:54,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:36:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875422626] [2024-06-28 00:36:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:36:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:36:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:36:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 430 transitions, 8166 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:56,804 INFO L124 PetriNetUnfolderBase]: 3959/6189 cut-off events. [2024-06-28 00:36:56,805 INFO L125 PetriNetUnfolderBase]: For 421031/421031 co-relation queries the response was YES. [2024-06-28 00:36:56,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56527 conditions, 6189 events. 3959/6189 cut-off events. For 421031/421031 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37128 event pairs, 1008 based on Foata normal form. 2/6190 useless extension candidates. Maximal degree in co-relation 56406. Up to 5847 conditions per place. [2024-06-28 00:36:56,880 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 400 selfloop transitions, 56 changer transitions 0/461 dead transitions. [2024-06-28 00:36:56,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 461 transitions, 9305 flow [2024-06-28 00:36:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:36:56,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 00:36:56,882 INFO L175 Difference]: Start difference. First operand has 229 places, 430 transitions, 8166 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:36:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 461 transitions, 9305 flow [2024-06-28 00:36:57,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 9132 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:57,644 INFO L231 Difference]: Finished difference. Result has 234 places, 431 transitions, 8177 flow [2024-06-28 00:36:57,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7997, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8177, PETRI_PLACES=234, PETRI_TRANSITIONS=431} [2024-06-28 00:36:57,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-28 00:36:57,646 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 431 transitions, 8177 flow [2024-06-28 00:36:57,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:36:57,647 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1427214639, now seen corresponding path program 7 times [2024-06-28 00:36:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648604280] [2024-06-28 00:36:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:01,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648604280] [2024-06-28 00:37:01,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648604280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:01,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:01,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393949743] [2024-06-28 00:37:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:01,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:01,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:01,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 431 transitions, 8177 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:01,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:01,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:01,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:03,838 INFO L124 PetriNetUnfolderBase]: 4515/7062 cut-off events. [2024-06-28 00:37:03,838 INFO L125 PetriNetUnfolderBase]: For 509899/509899 co-relation queries the response was YES. [2024-06-28 00:37:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64510 conditions, 7062 events. 4515/7062 cut-off events. For 509899/509899 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43463 event pairs, 1089 based on Foata normal form. 8/7065 useless extension candidates. Maximal degree in co-relation 64387. Up to 5496 conditions per place. [2024-06-28 00:37:03,919 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 386 selfloop transitions, 117 changer transitions 0/508 dead transitions. [2024-06-28 00:37:03,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 508 transitions, 10180 flow [2024-06-28 00:37:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:37:03,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-28 00:37:03,921 INFO L175 Difference]: Start difference. First operand has 234 places, 431 transitions, 8177 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:37:03,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 508 transitions, 10180 flow [2024-06-28 00:37:04,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 508 transitions, 10091 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:04,731 INFO L231 Difference]: Finished difference. Result has 241 places, 456 transitions, 8896 flow [2024-06-28 00:37:04,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8098, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8896, PETRI_PLACES=241, PETRI_TRANSITIONS=456} [2024-06-28 00:37:04,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-28 00:37:04,732 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 456 transitions, 8896 flow [2024-06-28 00:37:04,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:04,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:04,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:37:04,733 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:04,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:04,733 INFO L85 PathProgramCache]: Analyzing trace with hash 81586469, now seen corresponding path program 8 times [2024-06-28 00:37:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724519255] [2024-06-28 00:37:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:04,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724519255] [2024-06-28 00:37:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724519255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:08,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:08,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:08,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244442573] [2024-06-28 00:37:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:08,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:08,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 456 transitions, 8896 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:08,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:08,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:08,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:10,525 INFO L124 PetriNetUnfolderBase]: 4495/7030 cut-off events. [2024-06-28 00:37:10,526 INFO L125 PetriNetUnfolderBase]: For 527873/527873 co-relation queries the response was YES. [2024-06-28 00:37:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65417 conditions, 7030 events. 4495/7030 cut-off events. For 527873/527873 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43279 event pairs, 1151 based on Foata normal form. 10/7035 useless extension candidates. Maximal degree in co-relation 65292. Up to 6475 conditions per place. [2024-06-28 00:37:10,604 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 392 selfloop transitions, 106 changer transitions 0/503 dead transitions. [2024-06-28 00:37:10,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 503 transitions, 10360 flow [2024-06-28 00:37:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:37:10,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-28 00:37:10,606 INFO L175 Difference]: Start difference. First operand has 241 places, 456 transitions, 8896 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:37:10,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 503 transitions, 10360 flow [2024-06-28 00:37:11,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 503 transitions, 10132 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:11,625 INFO L231 Difference]: Finished difference. Result has 245 places, 463 transitions, 9107 flow [2024-06-28 00:37:11,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8674, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9107, PETRI_PLACES=245, PETRI_TRANSITIONS=463} [2024-06-28 00:37:11,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-28 00:37:11,626 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 463 transitions, 9107 flow [2024-06-28 00:37:11,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:11,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:11,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:37:11,626 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:11,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash 365313283, now seen corresponding path program 9 times [2024-06-28 00:37:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867124072] [2024-06-28 00:37:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867124072] [2024-06-28 00:37:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867124072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:15,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:15,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750207237] [2024-06-28 00:37:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:15,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:15,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:15,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 463 transitions, 9107 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:15,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:15,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:15,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:17,717 INFO L124 PetriNetUnfolderBase]: 4551/7125 cut-off events. [2024-06-28 00:37:17,718 INFO L125 PetriNetUnfolderBase]: For 546740/546746 co-relation queries the response was YES. [2024-06-28 00:37:17,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66591 conditions, 7125 events. 4551/7125 cut-off events. For 546740/546746 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44220 event pairs, 1159 based on Foata normal form. 7/7127 useless extension candidates. Maximal degree in co-relation 66464. Up to 5421 conditions per place. [2024-06-28 00:37:17,794 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 281 selfloop transitions, 224 changer transitions 0/510 dead transitions. [2024-06-28 00:37:17,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 510 transitions, 10821 flow [2024-06-28 00:37:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:37:17,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-28 00:37:17,796 INFO L175 Difference]: Start difference. First operand has 245 places, 463 transitions, 9107 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:37:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 510 transitions, 10821 flow [2024-06-28 00:37:18,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 510 transitions, 10540 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:18,654 INFO L231 Difference]: Finished difference. Result has 247 places, 467 transitions, 9361 flow [2024-06-28 00:37:18,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8826, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9361, PETRI_PLACES=247, PETRI_TRANSITIONS=467} [2024-06-28 00:37:18,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 00:37:18,655 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 467 transitions, 9361 flow [2024-06-28 00:37:18,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:18,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:18,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:18,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:37:18,656 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:18,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1464284773, now seen corresponding path program 10 times [2024-06-28 00:37:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:18,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124846883] [2024-06-28 00:37:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124846883] [2024-06-28 00:37:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124846883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:22,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215886137] [2024-06-28 00:37:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:22,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:22,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 467 transitions, 9361 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:24,670 INFO L124 PetriNetUnfolderBase]: 4554/7122 cut-off events. [2024-06-28 00:37:24,670 INFO L125 PetriNetUnfolderBase]: For 561167/561169 co-relation queries the response was YES. [2024-06-28 00:37:24,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67199 conditions, 7122 events. 4554/7122 cut-off events. For 561167/561169 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44265 event pairs, 1205 based on Foata normal form. 6/7120 useless extension candidates. Maximal degree in co-relation 67071. Up to 5452 conditions per place. [2024-06-28 00:37:24,753 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 266 selfloop transitions, 239 changer transitions 0/510 dead transitions. [2024-06-28 00:37:24,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 510 transitions, 11066 flow [2024-06-28 00:37:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:37:24,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 00:37:24,755 INFO L175 Difference]: Start difference. First operand has 247 places, 467 transitions, 9361 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:37:24,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 510 transitions, 11066 flow [2024-06-28 00:37:25,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 510 transitions, 10583 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:25,813 INFO L231 Difference]: Finished difference. Result has 249 places, 469 transitions, 9428 flow [2024-06-28 00:37:25,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9428, PETRI_PLACES=249, PETRI_TRANSITIONS=469} [2024-06-28 00:37:25,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-28 00:37:25,813 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 469 transitions, 9428 flow [2024-06-28 00:37:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:25,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:25,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:25,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:37:25,814 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:25,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -237191185, now seen corresponding path program 2 times [2024-06-28 00:37:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970883122] [2024-06-28 00:37:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:25,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:28,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:28,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970883122] [2024-06-28 00:37:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970883122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:28,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230740319] [2024-06-28 00:37:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:28,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 469 transitions, 9428 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:28,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:28,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:28,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:30,447 INFO L124 PetriNetUnfolderBase]: 4551/7129 cut-off events. [2024-06-28 00:37:30,447 INFO L125 PetriNetUnfolderBase]: For 567940/567940 co-relation queries the response was YES. [2024-06-28 00:37:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67368 conditions, 7129 events. 4551/7129 cut-off events. For 567940/567940 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44129 event pairs, 1198 based on Foata normal form. 1/7125 useless extension candidates. Maximal degree in co-relation 67239. Up to 6778 conditions per place. [2024-06-28 00:37:30,533 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 54 changer transitions 0/492 dead transitions. [2024-06-28 00:37:30,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 492 transitions, 10601 flow [2024-06-28 00:37:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:37:30,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-28 00:37:30,535 INFO L175 Difference]: Start difference. First operand has 249 places, 469 transitions, 9428 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:37:30,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 492 transitions, 10601 flow [2024-06-28 00:37:31,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 492 transitions, 10151 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:31,655 INFO L231 Difference]: Finished difference. Result has 248 places, 469 transitions, 9112 flow [2024-06-28 00:37:31,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8978, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9112, PETRI_PLACES=248, PETRI_TRANSITIONS=469} [2024-06-28 00:37:31,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-28 00:37:31,655 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 469 transitions, 9112 flow [2024-06-28 00:37:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:31,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:31,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:37:31,656 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2130632723, now seen corresponding path program 3 times [2024-06-28 00:37:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855013099] [2024-06-28 00:37:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855013099] [2024-06-28 00:37:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855013099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:34,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:34,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969602786] [2024-06-28 00:37:34,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:34,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:34,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 469 transitions, 9112 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:34,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:34,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:34,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:36,899 INFO L124 PetriNetUnfolderBase]: 4536/7108 cut-off events. [2024-06-28 00:37:36,899 INFO L125 PetriNetUnfolderBase]: For 573347/573347 co-relation queries the response was YES. [2024-06-28 00:37:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66069 conditions, 7108 events. 4536/7108 cut-off events. For 573347/573347 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44036 event pairs, 1230 based on Foata normal form. 1/7103 useless extension candidates. Maximal degree in co-relation 65938. Up to 6755 conditions per place. [2024-06-28 00:37:36,976 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 59 changer transitions 0/488 dead transitions. [2024-06-28 00:37:36,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 488 transitions, 10222 flow [2024-06-28 00:37:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 00:37:36,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 00:37:36,978 INFO L175 Difference]: Start difference. First operand has 248 places, 469 transitions, 9112 flow. Second operand 6 states and 112 transitions. [2024-06-28 00:37:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 488 transitions, 10222 flow [2024-06-28 00:37:37,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 488 transitions, 10122 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:37,932 INFO L231 Difference]: Finished difference. Result has 251 places, 473 transitions, 9257 flow [2024-06-28 00:37:37,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9015, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9257, PETRI_PLACES=251, PETRI_TRANSITIONS=473} [2024-06-28 00:37:37,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-28 00:37:37,933 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 473 transitions, 9257 flow [2024-06-28 00:37:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:37,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:37,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:37:37,933 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 316200325, now seen corresponding path program 1 times [2024-06-28 00:37:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593641659] [2024-06-28 00:37:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:40,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:40,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593641659] [2024-06-28 00:37:40,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593641659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:40,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:40,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984467778] [2024-06-28 00:37:40,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:40,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:40,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:37:40,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 473 transitions, 9257 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:40,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:40,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:37:40,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:42,956 INFO L124 PetriNetUnfolderBase]: 4390/6975 cut-off events. [2024-06-28 00:37:42,957 INFO L125 PetriNetUnfolderBase]: For 606327/606358 co-relation queries the response was YES. [2024-06-28 00:37:43,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65695 conditions, 6975 events. 4390/6975 cut-off events. For 606327/606358 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44209 event pairs, 1757 based on Foata normal form. 5/6948 useless extension candidates. Maximal degree in co-relation 65560. Up to 6271 conditions per place. [2024-06-28 00:37:43,045 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 32 changer transitions 0/504 dead transitions. [2024-06-28 00:37:43,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 504 transitions, 10564 flow [2024-06-28 00:37:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 00:37:43,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 00:37:43,048 INFO L175 Difference]: Start difference. First operand has 251 places, 473 transitions, 9257 flow. Second operand 6 states and 116 transitions. [2024-06-28 00:37:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 504 transitions, 10564 flow [2024-06-28 00:37:44,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 504 transitions, 10511 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:44,326 INFO L231 Difference]: Finished difference. Result has 256 places, 484 transitions, 9502 flow [2024-06-28 00:37:44,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9204, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9502, PETRI_PLACES=256, PETRI_TRANSITIONS=484} [2024-06-28 00:37:44,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-28 00:37:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 484 transitions, 9502 flow [2024-06-28 00:37:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:44,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:44,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:44,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:37:44,328 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -586238115, now seen corresponding path program 1 times [2024-06-28 00:37:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754599857] [2024-06-28 00:37:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754599857] [2024-06-28 00:37:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754599857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279572801] [2024-06-28 00:37:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:48,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 484 transitions, 9502 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:50,705 INFO L124 PetriNetUnfolderBase]: 4571/7176 cut-off events. [2024-06-28 00:37:50,705 INFO L125 PetriNetUnfolderBase]: For 609977/609977 co-relation queries the response was YES. [2024-06-28 00:37:50,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67644 conditions, 7176 events. 4571/7176 cut-off events. For 609977/609977 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44621 event pairs, 1320 based on Foata normal form. 4/7179 useless extension candidates. Maximal degree in co-relation 67505. Up to 6740 conditions per place. [2024-06-28 00:37:50,805 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 454 selfloop transitions, 69 changer transitions 0/528 dead transitions. [2024-06-28 00:37:50,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 528 transitions, 10990 flow [2024-06-28 00:37:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:37:50,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-28 00:37:50,807 INFO L175 Difference]: Start difference. First operand has 256 places, 484 transitions, 9502 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:37:50,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 528 transitions, 10990 flow [2024-06-28 00:37:52,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 528 transitions, 10906 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:52,296 INFO L231 Difference]: Finished difference. Result has 264 places, 493 transitions, 9682 flow [2024-06-28 00:37:52,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9682, PETRI_PLACES=264, PETRI_TRANSITIONS=493} [2024-06-28 00:37:52,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-28 00:37:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 493 transitions, 9682 flow [2024-06-28 00:37:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:52,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:52,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:37:52,297 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1521122483, now seen corresponding path program 2 times [2024-06-28 00:37:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656326729] [2024-06-28 00:37:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:55,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656326729] [2024-06-28 00:37:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656326729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:55,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:55,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917943996] [2024-06-28 00:37:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:55,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:55,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 493 transitions, 9682 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:55,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:57,289 INFO L124 PetriNetUnfolderBase]: 4626/7243 cut-off events. [2024-06-28 00:37:57,289 INFO L125 PetriNetUnfolderBase]: For 628827/628827 co-relation queries the response was YES. [2024-06-28 00:37:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69175 conditions, 7243 events. 4626/7243 cut-off events. For 628827/628827 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 44991 event pairs, 1813 based on Foata normal form. 3/7244 useless extension candidates. Maximal degree in co-relation 69033. Up to 6952 conditions per place. [2024-06-28 00:37:57,374 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 24 changer transitions 0/519 dead transitions. [2024-06-28 00:37:57,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 519 transitions, 11027 flow [2024-06-28 00:37:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:37:57,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-28 00:37:57,376 INFO L175 Difference]: Start difference. First operand has 264 places, 493 transitions, 9682 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:37:57,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 519 transitions, 11027 flow [2024-06-28 00:37:58,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 519 transitions, 10901 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:58,795 INFO L231 Difference]: Finished difference. Result has 270 places, 503 transitions, 9799 flow [2024-06-28 00:37:58,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9556, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9799, PETRI_PLACES=270, PETRI_TRANSITIONS=503} [2024-06-28 00:37:58,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-28 00:37:58,796 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 503 transitions, 9799 flow [2024-06-28 00:37:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:58,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:58,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:37:58,797 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:58,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash -428508285, now seen corresponding path program 1 times [2024-06-28 00:37:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516330779] [2024-06-28 00:37:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:02,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516330779] [2024-06-28 00:38:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516330779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:02,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:02,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:02,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144577979] [2024-06-28 00:38:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:02,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:02,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 503 transitions, 9799 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:02,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:02,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:02,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:05,023 INFO L124 PetriNetUnfolderBase]: 4894/7699 cut-off events. [2024-06-28 00:38:05,024 INFO L125 PetriNetUnfolderBase]: For 725803/725803 co-relation queries the response was YES. [2024-06-28 00:38:05,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72380 conditions, 7699 events. 4894/7699 cut-off events. For 725803/725803 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48462 event pairs, 1056 based on Foata normal form. 56/7754 useless extension candidates. Maximal degree in co-relation 72234. Up to 5796 conditions per place. [2024-06-28 00:38:05,114 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 432 selfloop transitions, 130 changer transitions 0/567 dead transitions. [2024-06-28 00:38:05,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 567 transitions, 11564 flow [2024-06-28 00:38:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 00:38:05,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 00:38:05,116 INFO L175 Difference]: Start difference. First operand has 270 places, 503 transitions, 9799 flow. Second operand 10 states and 200 transitions. [2024-06-28 00:38:05,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 567 transitions, 11564 flow [2024-06-28 00:38:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 567 transitions, 11442 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:06,755 INFO L231 Difference]: Finished difference. Result has 275 places, 509 transitions, 10139 flow [2024-06-28 00:38:06,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10139, PETRI_PLACES=275, PETRI_TRANSITIONS=509} [2024-06-28 00:38:06,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-28 00:38:06,756 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 509 transitions, 10139 flow [2024-06-28 00:38:06,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:06,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:06,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:06,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:38:06,756 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:06,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 458231789, now seen corresponding path program 2 times [2024-06-28 00:38:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:06,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990914078] [2024-06-28 00:38:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:06,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:10,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990914078] [2024-06-28 00:38:10,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990914078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:10,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:10,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:10,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461853590] [2024-06-28 00:38:10,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:10,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:10,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:10,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:10,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 509 transitions, 10139 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:10,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:10,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:12,601 INFO L124 PetriNetUnfolderBase]: 4743/7475 cut-off events. [2024-06-28 00:38:12,601 INFO L125 PetriNetUnfolderBase]: For 671388/671388 co-relation queries the response was YES. [2024-06-28 00:38:12,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67994 conditions, 7475 events. 4743/7475 cut-off events. For 671388/671388 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46938 event pairs, 1141 based on Foata normal form. 70/7544 useless extension candidates. Maximal degree in co-relation 67848. Up to 6466 conditions per place. [2024-06-28 00:38:12,708 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 452 selfloop transitions, 106 changer transitions 0/563 dead transitions. [2024-06-28 00:38:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 563 transitions, 11645 flow [2024-06-28 00:38:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 00:38:12,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-28 00:38:12,710 INFO L175 Difference]: Start difference. First operand has 275 places, 509 transitions, 10139 flow. Second operand 10 states and 191 transitions. [2024-06-28 00:38:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 563 transitions, 11645 flow [2024-06-28 00:38:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 563 transitions, 11066 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-06-28 00:38:14,820 INFO L231 Difference]: Finished difference. Result has 277 places, 513 transitions, 9971 flow [2024-06-28 00:38:14,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9652, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9971, PETRI_PLACES=277, PETRI_TRANSITIONS=513} [2024-06-28 00:38:14,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-28 00:38:14,821 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 513 transitions, 9971 flow [2024-06-28 00:38:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:14,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:14,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:38:14,822 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:14,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash 776438411, now seen corresponding path program 3 times [2024-06-28 00:38:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:14,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854827597] [2024-06-28 00:38:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:14,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854827597] [2024-06-28 00:38:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854827597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962933529] [2024-06-28 00:38:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:17,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 513 transitions, 9971 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:17,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:20,627 INFO L124 PetriNetUnfolderBase]: 4880/7703 cut-off events. [2024-06-28 00:38:20,627 INFO L125 PetriNetUnfolderBase]: For 621329/621335 co-relation queries the response was YES. [2024-06-28 00:38:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67676 conditions, 7703 events. 4880/7703 cut-off events. For 621329/621335 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 49117 event pairs, 1092 based on Foata normal form. 34/7735 useless extension candidates. Maximal degree in co-relation 67529. Up to 5786 conditions per place. [2024-06-28 00:38:20,733 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 233 changer transitions 0/581 dead transitions. [2024-06-28 00:38:20,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 581 transitions, 12108 flow [2024-06-28 00:38:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-28 00:38:20,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-28 00:38:20,735 INFO L175 Difference]: Start difference. First operand has 277 places, 513 transitions, 9971 flow. Second operand 9 states and 187 transitions. [2024-06-28 00:38:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 581 transitions, 12108 flow [2024-06-28 00:38:22,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 581 transitions, 11901 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 00:38:22,450 INFO L231 Difference]: Finished difference. Result has 278 places, 514 transitions, 10261 flow [2024-06-28 00:38:22,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9764, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10261, PETRI_PLACES=278, PETRI_TRANSITIONS=514} [2024-06-28 00:38:22,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-28 00:38:22,451 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 514 transitions, 10261 flow [2024-06-28 00:38:22,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:22,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:22,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:38:22,451 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:22,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash 418411083, now seen corresponding path program 4 times [2024-06-28 00:38:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691341622] [2024-06-28 00:38:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:26,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691341622] [2024-06-28 00:38:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691341622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:26,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857848034] [2024-06-28 00:38:26,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:26,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:26,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 514 transitions, 10261 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:26,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:26,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:26,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:29,197 INFO L124 PetriNetUnfolderBase]: 5017/7921 cut-off events. [2024-06-28 00:38:29,198 INFO L125 PetriNetUnfolderBase]: For 647082/647084 co-relation queries the response was YES. [2024-06-28 00:38:29,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70132 conditions, 7921 events. 5017/7921 cut-off events. For 647082/647084 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50751 event pairs, 1204 based on Foata normal form. 30/7949 useless extension candidates. Maximal degree in co-relation 69984. Up to 6033 conditions per place. [2024-06-28 00:38:29,297 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 340 selfloop transitions, 239 changer transitions 0/584 dead transitions. [2024-06-28 00:38:29,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 584 transitions, 12410 flow [2024-06-28 00:38:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-28 00:38:29,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-28 00:38:29,299 INFO L175 Difference]: Start difference. First operand has 278 places, 514 transitions, 10261 flow. Second operand 10 states and 203 transitions. [2024-06-28 00:38:29,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 584 transitions, 12410 flow [2024-06-28 00:38:31,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 584 transitions, 12021 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:31,156 INFO L231 Difference]: Finished difference. Result has 282 places, 516 transitions, 10422 flow [2024-06-28 00:38:31,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9872, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10422, PETRI_PLACES=282, PETRI_TRANSITIONS=516} [2024-06-28 00:38:31,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-28 00:38:31,165 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 516 transitions, 10422 flow [2024-06-28 00:38:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:31,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:31,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:31,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:38:31,166 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:31,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 576988751, now seen corresponding path program 5 times [2024-06-28 00:38:31,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:31,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540732821] [2024-06-28 00:38:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:34,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:34,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540732821] [2024-06-28 00:38:34,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540732821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:34,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:34,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965180086] [2024-06-28 00:38:34,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:34,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:34,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 516 transitions, 10422 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:34,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:34,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:38,001 INFO L124 PetriNetUnfolderBase]: 5139/8127 cut-off events. [2024-06-28 00:38:38,002 INFO L125 PetriNetUnfolderBase]: For 662032/662034 co-relation queries the response was YES. [2024-06-28 00:38:38,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71846 conditions, 8127 events. 5139/8127 cut-off events. For 662032/662034 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52363 event pairs, 1190 based on Foata normal form. 24/8149 useless extension candidates. Maximal degree in co-relation 71697. Up to 6013 conditions per place. [2024-06-28 00:38:38,098 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 349 selfloop transitions, 246 changer transitions 0/600 dead transitions. [2024-06-28 00:38:38,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 600 transitions, 12737 flow [2024-06-28 00:38:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:38:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:38:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-28 00:38:38,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-28 00:38:38,107 INFO L175 Difference]: Start difference. First operand has 282 places, 516 transitions, 10422 flow. Second operand 11 states and 223 transitions. [2024-06-28 00:38:38,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 600 transitions, 12737 flow [2024-06-28 00:38:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 600 transitions, 12272 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:40,007 INFO L231 Difference]: Finished difference. Result has 287 places, 523 transitions, 10616 flow [2024-06-28 00:38:40,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9957, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10616, PETRI_PLACES=287, PETRI_TRANSITIONS=523} [2024-06-28 00:38:40,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 00:38:40,019 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 523 transitions, 10616 flow [2024-06-28 00:38:40,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:40,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:40,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:40,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:38:40,019 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:40,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1957232665, now seen corresponding path program 1 times [2024-06-28 00:38:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:40,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154570541] [2024-06-28 00:38:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:43,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:43,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154570541] [2024-06-28 00:38:43,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154570541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:43,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:43,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:43,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338829299] [2024-06-28 00:38:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:43,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:43,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:43,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 523 transitions, 10616 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:43,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:43,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:43,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:46,768 INFO L124 PetriNetUnfolderBase]: 5624/8917 cut-off events. [2024-06-28 00:38:46,769 INFO L125 PetriNetUnfolderBase]: For 787861/787867 co-relation queries the response was YES. [2024-06-28 00:38:46,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81025 conditions, 8917 events. 5624/8917 cut-off events. For 787861/787867 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58402 event pairs, 1262 based on Foata normal form. 22/8937 useless extension candidates. Maximal degree in co-relation 80874. Up to 5237 conditions per place. [2024-06-28 00:38:46,916 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 363 selfloop transitions, 236 changer transitions 0/604 dead transitions. [2024-06-28 00:38:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 604 transitions, 13337 flow [2024-06-28 00:38:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-28 00:38:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-28 00:38:46,917 INFO L175 Difference]: Start difference. First operand has 287 places, 523 transitions, 10616 flow. Second operand 9 states and 190 transitions. [2024-06-28 00:38:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 604 transitions, 13337 flow [2024-06-28 00:38:49,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 604 transitions, 12721 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-28 00:38:49,254 INFO L231 Difference]: Finished difference. Result has 288 places, 529 transitions, 10694 flow [2024-06-28 00:38:49,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10694, PETRI_PLACES=288, PETRI_TRANSITIONS=529} [2024-06-28 00:38:49,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-28 00:38:49,256 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 529 transitions, 10694 flow [2024-06-28 00:38:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:49,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:38:49,257 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:49,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 256233743, now seen corresponding path program 6 times [2024-06-28 00:38:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829076607] [2024-06-28 00:38:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:51,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829076607] [2024-06-28 00:38:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829076607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088981613] [2024-06-28 00:38:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:51,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:51,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 529 transitions, 10694 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:51,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:51,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:51,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:54,483 INFO L124 PetriNetUnfolderBase]: 5630/8918 cut-off events. [2024-06-28 00:38:54,483 INFO L125 PetriNetUnfolderBase]: For 781747/781747 co-relation queries the response was YES. [2024-06-28 00:38:54,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81071 conditions, 8918 events. 5630/8918 cut-off events. For 781747/781747 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58282 event pairs, 1425 based on Foata normal form. 6/8923 useless extension candidates. Maximal degree in co-relation 80918. Up to 7327 conditions per place. [2024-06-28 00:38:54,588 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 468 selfloop transitions, 124 changer transitions 0/597 dead transitions. [2024-06-28 00:38:54,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 597 transitions, 12846 flow [2024-06-28 00:38:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 00:38:54,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-28 00:38:54,590 INFO L175 Difference]: Start difference. First operand has 288 places, 529 transitions, 10694 flow. Second operand 9 states and 182 transitions. [2024-06-28 00:38:54,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 597 transitions, 12846 flow [2024-06-28 00:38:56,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 597 transitions, 12625 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:56,908 INFO L231 Difference]: Finished difference. Result has 294 places, 535 transitions, 10923 flow [2024-06-28 00:38:56,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10477, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10923, PETRI_PLACES=294, PETRI_TRANSITIONS=535} [2024-06-28 00:38:56,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-28 00:38:56,910 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 535 transitions, 10923 flow [2024-06-28 00:38:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:56,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:56,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:38:56,910 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:56,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1614054539, now seen corresponding path program 7 times [2024-06-28 00:38:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:56,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380433691] [2024-06-28 00:38:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380433691] [2024-06-28 00:38:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380433691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:58,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:58,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:58,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623257632] [2024-06-28 00:38:58,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:58,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:58,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 535 transitions, 10923 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:58,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:58,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:58,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:01,919 INFO L124 PetriNetUnfolderBase]: 5631/8953 cut-off events. [2024-06-28 00:39:01,920 INFO L125 PetriNetUnfolderBase]: For 795520/795520 co-relation queries the response was YES. [2024-06-28 00:39:02,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82198 conditions, 8953 events. 5631/8953 cut-off events. For 795520/795520 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 58982 event pairs, 1635 based on Foata normal form. 6/8958 useless extension candidates. Maximal degree in co-relation 82042. Up to 8292 conditions per place. [2024-06-28 00:39:02,053 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 478 selfloop transitions, 109 changer transitions 0/592 dead transitions. [2024-06-28 00:39:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 592 transitions, 12788 flow [2024-06-28 00:39:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:39:02,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 00:39:02,055 INFO L175 Difference]: Start difference. First operand has 294 places, 535 transitions, 10923 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:39:02,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 592 transitions, 12788 flow [2024-06-28 00:39:04,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 592 transitions, 12520 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:04,534 INFO L231 Difference]: Finished difference. Result has 297 places, 539 transitions, 11016 flow [2024-06-28 00:39:04,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11016, PETRI_PLACES=297, PETRI_TRANSITIONS=539} [2024-06-28 00:39:04,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-28 00:39:04,535 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 539 transitions, 11016 flow [2024-06-28 00:39:04,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:04,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:04,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:04,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:39:04,535 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:04,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1829718739, now seen corresponding path program 8 times [2024-06-28 00:39:04,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:04,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914442722] [2024-06-28 00:39:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:04,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:06,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914442722] [2024-06-28 00:39:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914442722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:06,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:06,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:39:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803085074] [2024-06-28 00:39:06,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:39:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:39:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:39:06,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 00:39:06,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 539 transitions, 11016 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:06,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:06,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 00:39:06,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:08,677 INFO L124 PetriNetUnfolderBase]: 4612/7811 cut-off events. [2024-06-28 00:39:08,677 INFO L125 PetriNetUnfolderBase]: For 754134/754542 co-relation queries the response was YES. [2024-06-28 00:39:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73542 conditions, 7811 events. 4612/7811 cut-off events. For 754134/754542 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 55755 event pairs, 934 based on Foata normal form. 171/7817 useless extension candidates. Maximal degree in co-relation 73385. Up to 4466 conditions per place. [2024-06-28 00:39:08,800 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 329 selfloop transitions, 139 changer transitions 0/608 dead transitions. [2024-06-28 00:39:08,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 608 transitions, 13146 flow [2024-06-28 00:39:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-28 00:39:08,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-28 00:39:08,803 INFO L175 Difference]: Start difference. First operand has 297 places, 539 transitions, 11016 flow. Second operand 8 states and 177 transitions. [2024-06-28 00:39:08,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 608 transitions, 13146 flow [2024-06-28 00:39:11,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 608 transitions, 12861 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:11,118 INFO L231 Difference]: Finished difference. Result has 299 places, 547 transitions, 11291 flow [2024-06-28 00:39:11,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10731, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11291, PETRI_PLACES=299, PETRI_TRANSITIONS=547} [2024-06-28 00:39:11,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-28 00:39:11,119 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 547 transitions, 11291 flow [2024-06-28 00:39:11,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:11,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:11,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:11,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:39:11,120 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:11,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1614060491, now seen corresponding path program 2 times [2024-06-28 00:39:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:11,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369647457] [2024-06-28 00:39:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369647457] [2024-06-28 00:39:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369647457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196937003] [2024-06-28 00:39:14,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 547 transitions, 11291 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:17,662 INFO L124 PetriNetUnfolderBase]: 5715/9091 cut-off events. [2024-06-28 00:39:17,662 INFO L125 PetriNetUnfolderBase]: For 851977/851977 co-relation queries the response was YES. [2024-06-28 00:39:17,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83156 conditions, 9091 events. 5715/9091 cut-off events. For 851977/851977 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 60093 event pairs, 1516 based on Foata normal form. 44/9134 useless extension candidates. Maximal degree in co-relation 82997. Up to 7918 conditions per place. [2024-06-28 00:39:17,770 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 438 selfloop transitions, 171 changer transitions 0/614 dead transitions. [2024-06-28 00:39:17,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 614 transitions, 13290 flow [2024-06-28 00:39:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:39:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:39:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-28 00:39:17,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-28 00:39:17,772 INFO L175 Difference]: Start difference. First operand has 299 places, 547 transitions, 11291 flow. Second operand 11 states and 216 transitions. [2024-06-28 00:39:17,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 614 transitions, 13290 flow [2024-06-28 00:39:19,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 614 transitions, 13018 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:19,815 INFO L231 Difference]: Finished difference. Result has 305 places, 552 transitions, 11587 flow [2024-06-28 00:39:19,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11587, PETRI_PLACES=305, PETRI_TRANSITIONS=552} [2024-06-28 00:39:19,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-28 00:39:19,816 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 552 transitions, 11587 flow [2024-06-28 00:39:19,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:19,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:19,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:19,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:39:19,817 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:19,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1767659095, now seen corresponding path program 9 times [2024-06-28 00:39:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:19,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419300089] [2024-06-28 00:39:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419300089] [2024-06-28 00:39:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419300089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:23,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:23,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789213925] [2024-06-28 00:39:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:23,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:23,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 552 transitions, 11587 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:23,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:23,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:23,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:27,017 INFO L124 PetriNetUnfolderBase]: 5893/9377 cut-off events. [2024-06-28 00:39:27,018 INFO L125 PetriNetUnfolderBase]: For 831144/831144 co-relation queries the response was YES. [2024-06-28 00:39:27,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84035 conditions, 9377 events. 5893/9377 cut-off events. For 831144/831144 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 62106 event pairs, 1470 based on Foata normal form. 38/9410 useless extension candidates. Maximal degree in co-relation 83875. Up to 7367 conditions per place. [2024-06-28 00:39:27,159 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 466 selfloop transitions, 138 changer transitions 0/609 dead transitions. [2024-06-28 00:39:27,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 609 transitions, 13451 flow [2024-06-28 00:39:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:39:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:39:27,161 INFO L175 Difference]: Start difference. First operand has 305 places, 552 transitions, 11587 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:39:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 609 transitions, 13451 flow [2024-06-28 00:39:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 609 transitions, 13117 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:29,736 INFO L231 Difference]: Finished difference. Result has 307 places, 556 transitions, 11703 flow [2024-06-28 00:39:29,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11253, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11703, PETRI_PLACES=307, PETRI_TRANSITIONS=556} [2024-06-28 00:39:29,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-28 00:39:29,737 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 556 transitions, 11703 flow [2024-06-28 00:39:29,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:29,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:29,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:39:29,738 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:29,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1126702675, now seen corresponding path program 10 times [2024-06-28 00:39:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:29,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725623645] [2024-06-28 00:39:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:29,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725623645] [2024-06-28 00:39:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725623645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930930727] [2024-06-28 00:39:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:33,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:33,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 556 transitions, 11703 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:33,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:33,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:33,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:36,293 INFO L124 PetriNetUnfolderBase]: 5788/9216 cut-off events. [2024-06-28 00:39:36,293 INFO L125 PetriNetUnfolderBase]: For 776393/776393 co-relation queries the response was YES. [2024-06-28 00:39:36,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79624 conditions, 9216 events. 5788/9216 cut-off events. For 776393/776393 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 61016 event pairs, 1524 based on Foata normal form. 50/9261 useless extension candidates. Maximal degree in co-relation 79463. Up to 8077 conditions per place. [2024-06-28 00:39:36,422 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 489 selfloop transitions, 108 changer transitions 0/602 dead transitions. [2024-06-28 00:39:36,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 602 transitions, 13257 flow [2024-06-28 00:39:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 00:39:36,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-28 00:39:36,424 INFO L175 Difference]: Start difference. First operand has 307 places, 556 transitions, 11703 flow. Second operand 10 states and 181 transitions. [2024-06-28 00:39:36,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 602 transitions, 13257 flow [2024-06-28 00:39:38,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 602 transitions, 12831 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:38,734 INFO L231 Difference]: Finished difference. Result has 310 places, 559 transitions, 11666 flow [2024-06-28 00:39:38,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11666, PETRI_PLACES=310, PETRI_TRANSITIONS=559} [2024-06-28 00:39:38,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-28 00:39:38,738 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 559 transitions, 11666 flow [2024-06-28 00:39:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:38,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:38,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:38,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:39:38,739 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:38,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash 761323381, now seen corresponding path program 11 times [2024-06-28 00:39:38,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:38,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007854907] [2024-06-28 00:39:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007854907] [2024-06-28 00:39:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007854907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069956537] [2024-06-28 00:39:42,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:42,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:42,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 559 transitions, 11666 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:42,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:42,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:42,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:45,482 INFO L124 PetriNetUnfolderBase]: 6036/9624 cut-off events. [2024-06-28 00:39:45,483 INFO L125 PetriNetUnfolderBase]: For 751965/751971 co-relation queries the response was YES. [2024-06-28 00:39:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81203 conditions, 9624 events. 6036/9624 cut-off events. For 751965/751971 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 64597 event pairs, 1417 based on Foata normal form. 31/9650 useless extension candidates. Maximal degree in co-relation 81041. Up to 7526 conditions per place. [2024-06-28 00:39:45,606 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 376 selfloop transitions, 229 changer transitions 0/610 dead transitions. [2024-06-28 00:39:45,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 610 transitions, 13754 flow [2024-06-28 00:39:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 00:39:45,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 00:39:45,608 INFO L175 Difference]: Start difference. First operand has 310 places, 559 transitions, 11666 flow. Second operand 9 states and 174 transitions. [2024-06-28 00:39:45,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 610 transitions, 13754 flow [2024-06-28 00:39:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 610 transitions, 13550 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:47,721 INFO L231 Difference]: Finished difference. Result has 311 places, 561 transitions, 11977 flow [2024-06-28 00:39:47,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11462, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11977, PETRI_PLACES=311, PETRI_TRANSITIONS=561} [2024-06-28 00:39:47,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-28 00:39:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 561 transitions, 11977 flow [2024-06-28 00:39:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:47,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:39:47,723 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -914153261, now seen corresponding path program 12 times [2024-06-28 00:39:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063012595] [2024-06-28 00:39:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:51,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:51,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063012595] [2024-06-28 00:39:51,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063012595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:51,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30029773] [2024-06-28 00:39:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:51,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:51,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:51,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:51,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 561 transitions, 11977 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:51,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:51,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:51,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:55,815 INFO L124 PetriNetUnfolderBase]: 6395/10204 cut-off events. [2024-06-28 00:39:55,816 INFO L125 PetriNetUnfolderBase]: For 833529/833535 co-relation queries the response was YES. [2024-06-28 00:39:55,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86109 conditions, 10204 events. 6395/10204 cut-off events. For 833529/833535 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 69385 event pairs, 1519 based on Foata normal form. 51/10250 useless extension candidates. Maximal degree in co-relation 85946. Up to 8012 conditions per place. [2024-06-28 00:39:55,957 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 377 selfloop transitions, 235 changer transitions 0/617 dead transitions. [2024-06-28 00:39:55,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 617 transitions, 14122 flow [2024-06-28 00:39:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:39:55,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:39:55,985 INFO L175 Difference]: Start difference. First operand has 311 places, 561 transitions, 11977 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:39:55,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 617 transitions, 14122 flow [2024-06-28 00:39:58,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 617 transitions, 13734 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:58,260 INFO L231 Difference]: Finished difference. Result has 316 places, 566 transitions, 12210 flow [2024-06-28 00:39:58,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12210, PETRI_PLACES=316, PETRI_TRANSITIONS=566} [2024-06-28 00:39:58,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-28 00:39:58,261 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 566 transitions, 12210 flow [2024-06-28 00:39:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:58,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:58,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:58,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:39:58,262 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:58,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 561873721, now seen corresponding path program 13 times [2024-06-28 00:39:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:58,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890815958] [2024-06-28 00:39:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890815958] [2024-06-28 00:40:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890815958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:02,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039032513] [2024-06-28 00:40:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:02,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 566 transitions, 12210 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:02,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:02,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:05,962 INFO L124 PetriNetUnfolderBase]: 6595/10536 cut-off events. [2024-06-28 00:40:05,963 INFO L125 PetriNetUnfolderBase]: For 808726/808732 co-relation queries the response was YES. [2024-06-28 00:40:06,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88735 conditions, 10536 events. 6595/10536 cut-off events. For 808726/808732 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 72069 event pairs, 1501 based on Foata normal form. 25/10556 useless extension candidates. Maximal degree in co-relation 88571. Up to 8013 conditions per place. [2024-06-28 00:40:06,090 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 384 selfloop transitions, 245 changer transitions 0/634 dead transitions. [2024-06-28 00:40:06,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 634 transitions, 14489 flow [2024-06-28 00:40:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-28 00:40:06,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-28 00:40:06,092 INFO L175 Difference]: Start difference. First operand has 316 places, 566 transitions, 12210 flow. Second operand 11 states and 210 transitions. [2024-06-28 00:40:06,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 634 transitions, 14489 flow [2024-06-28 00:40:08,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 634 transitions, 14049 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:08,262 INFO L231 Difference]: Finished difference. Result has 321 places, 574 transitions, 12472 flow [2024-06-28 00:40:08,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11770, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12472, PETRI_PLACES=321, PETRI_TRANSITIONS=574} [2024-06-28 00:40:08,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-28 00:40:08,263 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 574 transitions, 12472 flow [2024-06-28 00:40:08,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:08,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:08,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:08,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:40:08,264 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:08,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash 768947893, now seen corresponding path program 3 times [2024-06-28 00:40:08,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:08,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558694096] [2024-06-28 00:40:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558694096] [2024-06-28 00:40:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558694096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:12,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388383186] [2024-06-28 00:40:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:12,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:12,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:12,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 574 transitions, 12472 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:12,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:12,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:16,036 INFO L124 PetriNetUnfolderBase]: 7012/11237 cut-off events. [2024-06-28 00:40:16,036 INFO L125 PetriNetUnfolderBase]: For 929504/929510 co-relation queries the response was YES. [2024-06-28 00:40:16,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96749 conditions, 11237 events. 7012/11237 cut-off events. For 929504/929510 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 77987 event pairs, 1618 based on Foata normal form. 19/11251 useless extension candidates. Maximal degree in co-relation 96584. Up to 6927 conditions per place. [2024-06-28 00:40:16,183 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 237 changer transitions 0/638 dead transitions. [2024-06-28 00:40:16,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 638 transitions, 15150 flow [2024-06-28 00:40:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 00:40:16,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 00:40:16,184 INFO L175 Difference]: Start difference. First operand has 321 places, 574 transitions, 12472 flow. Second operand 9 states and 177 transitions. [2024-06-28 00:40:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 638 transitions, 15150 flow [2024-06-28 00:40:18,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 638 transitions, 14592 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-28 00:40:18,683 INFO L231 Difference]: Finished difference. Result has 323 places, 582 transitions, 12689 flow [2024-06-28 00:40:18,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11914, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12689, PETRI_PLACES=323, PETRI_TRANSITIONS=582} [2024-06-28 00:40:18,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-28 00:40:18,684 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 582 transitions, 12689 flow [2024-06-28 00:40:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:18,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:18,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:18,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:40:18,684 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:18,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash 31493217, now seen corresponding path program 14 times [2024-06-28 00:40:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860055898] [2024-06-28 00:40:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:22,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860055898] [2024-06-28 00:40:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860055898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:22,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:22,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438127389] [2024-06-28 00:40:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:22,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:22,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:22,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 582 transitions, 12689 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:22,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:22,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:22,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:25,787 INFO L124 PetriNetUnfolderBase]: 7149/11448 cut-off events. [2024-06-28 00:40:25,788 INFO L125 PetriNetUnfolderBase]: For 991231/991243 co-relation queries the response was YES. [2024-06-28 00:40:25,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98834 conditions, 11448 events. 7149/11448 cut-off events. For 991231/991243 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 80058 event pairs, 1658 based on Foata normal form. 42/11482 useless extension candidates. Maximal degree in co-relation 98667. Up to 9517 conditions per place. [2024-06-28 00:40:25,928 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 230 changer transitions 0/630 dead transitions. [2024-06-28 00:40:25,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 630 transitions, 14853 flow [2024-06-28 00:40:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 00:40:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 00:40:25,930 INFO L175 Difference]: Start difference. First operand has 323 places, 582 transitions, 12689 flow. Second operand 9 states and 168 transitions. [2024-06-28 00:40:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 630 transitions, 14853 flow [2024-06-28 00:40:28,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 630 transitions, 14553 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 00:40:28,542 INFO L231 Difference]: Finished difference. Result has 327 places, 583 transitions, 12896 flow [2024-06-28 00:40:28,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12389, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12896, PETRI_PLACES=327, PETRI_TRANSITIONS=583} [2024-06-28 00:40:28,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-28 00:40:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 583 transitions, 12896 flow [2024-06-28 00:40:28,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:28,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:28,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:40:28,543 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:28,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1851662811, now seen corresponding path program 15 times [2024-06-28 00:40:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340582861] [2024-06-28 00:40:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:32,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:32,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340582861] [2024-06-28 00:40:32,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340582861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:32,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:32,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808327519] [2024-06-28 00:40:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:32,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:32,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 583 transitions, 12896 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:36,708 INFO L124 PetriNetUnfolderBase]: 7188/11519 cut-off events. [2024-06-28 00:40:36,708 INFO L125 PetriNetUnfolderBase]: For 998905/998907 co-relation queries the response was YES. [2024-06-28 00:40:36,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98840 conditions, 11519 events. 7188/11519 cut-off events. For 998905/998907 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 80598 event pairs, 1757 based on Foata normal form. 50/11561 useless extension candidates. Maximal degree in co-relation 98671. Up to 9463 conditions per place. [2024-06-28 00:40:36,871 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 382 selfloop transitions, 249 changer transitions 0/636 dead transitions. [2024-06-28 00:40:36,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 636 transitions, 15121 flow [2024-06-28 00:40:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:40:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:40:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:40:36,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-28 00:40:36,872 INFO L175 Difference]: Start difference. First operand has 327 places, 583 transitions, 12896 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:40:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 636 transitions, 15121 flow [2024-06-28 00:40:39,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 636 transitions, 14677 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:39,575 INFO L231 Difference]: Finished difference. Result has 330 places, 586 transitions, 13086 flow [2024-06-28 00:40:39,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12452, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13086, PETRI_PLACES=330, PETRI_TRANSITIONS=586} [2024-06-28 00:40:39,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-28 00:40:39,576 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 586 transitions, 13086 flow [2024-06-28 00:40:39,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:39,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:39,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:39,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:40:39,577 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:39,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash 359575977, now seen corresponding path program 16 times [2024-06-28 00:40:39,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:39,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037219551] [2024-06-28 00:40:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:39,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:43,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:43,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037219551] [2024-06-28 00:40:43,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037219551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:43,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:43,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434768818] [2024-06-28 00:40:43,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:43,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:43,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:43,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:43,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:43,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 586 transitions, 13086 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:43,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:43,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:47,768 INFO L124 PetriNetUnfolderBase]: 7246/11621 cut-off events. [2024-06-28 00:40:47,769 INFO L125 PetriNetUnfolderBase]: For 950845/950847 co-relation queries the response was YES. [2024-06-28 00:40:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99660 conditions, 11621 events. 7246/11621 cut-off events. For 950845/950847 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 81510 event pairs, 1737 based on Foata normal form. 24/11637 useless extension candidates. Maximal degree in co-relation 99491. Up to 9372 conditions per place. [2024-06-28 00:40:47,958 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 391 selfloop transitions, 254 changer transitions 0/650 dead transitions. [2024-06-28 00:40:47,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 650 transitions, 15434 flow [2024-06-28 00:40:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-28 00:40:47,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-28 00:40:47,960 INFO L175 Difference]: Start difference. First operand has 330 places, 586 transitions, 13086 flow. Second operand 11 states and 204 transitions. [2024-06-28 00:40:47,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 650 transitions, 15434 flow [2024-06-28 00:40:50,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 650 transitions, 14869 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:50,942 INFO L231 Difference]: Finished difference. Result has 335 places, 591 transitions, 13212 flow [2024-06-28 00:40:50,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12521, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13212, PETRI_PLACES=335, PETRI_TRANSITIONS=591} [2024-06-28 00:40:50,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-28 00:40:50,943 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 591 transitions, 13212 flow [2024-06-28 00:40:50,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:50,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:50,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:40:50,943 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:50,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1177948219, now seen corresponding path program 4 times [2024-06-28 00:40:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16042214] [2024-06-28 00:40:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:54,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:54,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16042214] [2024-06-28 00:40:54,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16042214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:54,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:54,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637255753] [2024-06-28 00:40:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:54,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:54,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 591 transitions, 13212 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:58,767 INFO L124 PetriNetUnfolderBase]: 7334/11776 cut-off events. [2024-06-28 00:40:58,767 INFO L125 PetriNetUnfolderBase]: For 956497/956509 co-relation queries the response was YES. [2024-06-28 00:40:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100505 conditions, 11776 events. 7334/11776 cut-off events. For 956497/956509 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 82808 event pairs, 1674 based on Foata normal form. 30/11798 useless extension candidates. Maximal degree in co-relation 100334. Up to 9664 conditions per place. [2024-06-28 00:40:58,930 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 229 changer transitions 0/646 dead transitions. [2024-06-28 00:40:58,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 646 transitions, 15738 flow [2024-06-28 00:40:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:40:58,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:40:58,931 INFO L175 Difference]: Start difference. First operand has 335 places, 591 transitions, 13212 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:40:58,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 646 transitions, 15738 flow [2024-06-28 00:41:01,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 646 transitions, 15125 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-28 00:41:01,916 INFO L231 Difference]: Finished difference. Result has 337 places, 594 transitions, 13198 flow [2024-06-28 00:41:01,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12599, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13198, PETRI_PLACES=337, PETRI_TRANSITIONS=594} [2024-06-28 00:41:01,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-28 00:41:01,917 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 594 transitions, 13198 flow [2024-06-28 00:41:01,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:01,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:01,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:01,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:41:01,918 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:01,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 600978337, now seen corresponding path program 5 times [2024-06-28 00:41:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331969324] [2024-06-28 00:41:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:01,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:05,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:05,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331969324] [2024-06-28 00:41:05,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331969324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:05,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:05,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120631422] [2024-06-28 00:41:05,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:05,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:05,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:05,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:05,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 594 transitions, 13198 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:05,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:05,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:05,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:09,902 INFO L124 PetriNetUnfolderBase]: 7328/11773 cut-off events. [2024-06-28 00:41:09,903 INFO L125 PetriNetUnfolderBase]: For 941127/941139 co-relation queries the response was YES. [2024-06-28 00:41:10,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99126 conditions, 11773 events. 7328/11773 cut-off events. For 941127/941139 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 82300 event pairs, 1605 based on Foata normal form. 30/11795 useless extension candidates. Maximal degree in co-relation 98953. Up to 5327 conditions per place. [2024-06-28 00:41:10,060 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 254 changer transitions 0/649 dead transitions. [2024-06-28 00:41:10,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 649 transitions, 15672 flow [2024-06-28 00:41:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:41:10,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-28 00:41:10,062 INFO L175 Difference]: Start difference. First operand has 337 places, 594 transitions, 13198 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:41:10,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 649 transitions, 15672 flow [2024-06-28 00:41:12,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 649 transitions, 15354 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:12,968 INFO L231 Difference]: Finished difference. Result has 343 places, 599 transitions, 13695 flow [2024-06-28 00:41:12,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12880, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13695, PETRI_PLACES=343, PETRI_TRANSITIONS=599} [2024-06-28 00:41:12,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-28 00:41:12,969 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 599 transitions, 13695 flow [2024-06-28 00:41:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:12,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:12,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:41:12,970 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:12,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash -54307159, now seen corresponding path program 2 times [2024-06-28 00:41:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86482256] [2024-06-28 00:41:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:16,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86482256] [2024-06-28 00:41:16,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86482256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:16,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:16,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:16,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127929506] [2024-06-28 00:41:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:16,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:16,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 599 transitions, 13695 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:16,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:16,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:16,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:20,078 INFO L124 PetriNetUnfolderBase]: 7358/11843 cut-off events. [2024-06-28 00:41:20,078 INFO L125 PetriNetUnfolderBase]: For 940875/940875 co-relation queries the response was YES. [2024-06-28 00:41:20,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101857 conditions, 11843 events. 7358/11843 cut-off events. For 940875/940875 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 83392 event pairs, 2437 based on Foata normal form. 4/11843 useless extension candidates. Maximal degree in co-relation 101680. Up to 11336 conditions per place. [2024-06-28 00:41:20,264 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 553 selfloop transitions, 75 changer transitions 0/633 dead transitions. [2024-06-28 00:41:20,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 633 transitions, 15287 flow [2024-06-28 00:41:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:41:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:41:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:41:20,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-28 00:41:20,265 INFO L175 Difference]: Start difference. First operand has 343 places, 599 transitions, 13695 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:41:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 633 transitions, 15287 flow [2024-06-28 00:41:23,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 633 transitions, 14959 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 00:41:23,733 INFO L231 Difference]: Finished difference. Result has 347 places, 607 transitions, 13590 flow [2024-06-28 00:41:23,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13590, PETRI_PLACES=347, PETRI_TRANSITIONS=607} [2024-06-28 00:41:23,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-28 00:41:23,734 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 607 transitions, 13590 flow [2024-06-28 00:41:23,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:23,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:23,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:23,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:41:23,735 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:23,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -234542603, now seen corresponding path program 3 times [2024-06-28 00:41:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171282407] [2024-06-28 00:41:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:23,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:27,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:27,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171282407] [2024-06-28 00:41:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171282407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:27,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374582382] [2024-06-28 00:41:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:27,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:27,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:27,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 607 transitions, 13590 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:27,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:27,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:27,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:31,056 INFO L124 PetriNetUnfolderBase]: 7346/11830 cut-off events. [2024-06-28 00:41:31,056 INFO L125 PetriNetUnfolderBase]: For 932005/932005 co-relation queries the response was YES. [2024-06-28 00:41:31,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101390 conditions, 11830 events. 7346/11830 cut-off events. For 932005/932005 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 83681 event pairs, 3306 based on Foata normal form. 4/11832 useless extension candidates. Maximal degree in co-relation 101211. Up to 11494 conditions per place. [2024-06-28 00:41:31,236 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 593 selfloop transitions, 22 changer transitions 0/620 dead transitions. [2024-06-28 00:41:31,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 620 transitions, 14871 flow [2024-06-28 00:41:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 00:41:31,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-28 00:41:31,238 INFO L175 Difference]: Start difference. First operand has 347 places, 607 transitions, 13590 flow. Second operand 7 states and 111 transitions. [2024-06-28 00:41:31,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 620 transitions, 14871 flow [2024-06-28 00:41:34,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 620 transitions, 14732 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 00:41:34,616 INFO L231 Difference]: Finished difference. Result has 351 places, 607 transitions, 13519 flow [2024-06-28 00:41:34,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13461, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13519, PETRI_PLACES=351, PETRI_TRANSITIONS=607} [2024-06-28 00:41:34,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-28 00:41:34,617 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 607 transitions, 13519 flow [2024-06-28 00:41:34,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:34,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:34,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:34,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:41:34,618 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:34,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -38906625, now seen corresponding path program 1 times [2024-06-28 00:41:34,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:34,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750305474] [2024-06-28 00:41:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750305474] [2024-06-28 00:41:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750305474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:41:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558799087] [2024-06-28 00:41:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:41:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:41:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:41:37,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:37,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 607 transitions, 13519 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:37,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:37,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:37,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:41,145 INFO L124 PetriNetUnfolderBase]: 7376/11873 cut-off events. [2024-06-28 00:41:41,146 INFO L125 PetriNetUnfolderBase]: For 954838/954842 co-relation queries the response was YES. [2024-06-28 00:41:41,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101723 conditions, 11873 events. 7376/11873 cut-off events. For 954838/954842 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 83899 event pairs, 3325 based on Foata normal form. 10/11881 useless extension candidates. Maximal degree in co-relation 101543. Up to 11388 conditions per place. [2024-06-28 00:41:41,316 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 586 selfloop transitions, 43 changer transitions 0/634 dead transitions. [2024-06-28 00:41:41,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 634 transitions, 15272 flow [2024-06-28 00:41:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:41:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:41:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 00:41:41,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-28 00:41:41,318 INFO L175 Difference]: Start difference. First operand has 351 places, 607 transitions, 13519 flow. Second operand 6 states and 115 transitions. [2024-06-28 00:41:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 634 transitions, 15272 flow [2024-06-28 00:41:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 634 transitions, 15226 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:45,606 INFO L231 Difference]: Finished difference. Result has 351 places, 612 transitions, 13656 flow [2024-06-28 00:41:45,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13473, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13656, PETRI_PLACES=351, PETRI_TRANSITIONS=612} [2024-06-28 00:41:45,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-28 00:41:45,607 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 612 transitions, 13656 flow [2024-06-28 00:41:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:45,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:45,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:45,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:41:45,607 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:45,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1381216541, now seen corresponding path program 2 times [2024-06-28 00:41:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857021135] [2024-06-28 00:41:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:48,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857021135] [2024-06-28 00:41:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857021135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:48,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:48,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331601334] [2024-06-28 00:41:48,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:48,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:48,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:41:48,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 612 transitions, 13656 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:48,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:48,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:41:48,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:52,689 INFO L124 PetriNetUnfolderBase]: 6944/11443 cut-off events. [2024-06-28 00:41:52,689 INFO L125 PetriNetUnfolderBase]: For 982521/982568 co-relation queries the response was YES. [2024-06-28 00:41:52,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97140 conditions, 11443 events. 6944/11443 cut-off events. For 982521/982568 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 83602 event pairs, 3274 based on Foata normal form. 8/11411 useless extension candidates. Maximal degree in co-relation 96958. Up to 10182 conditions per place. [2024-06-28 00:41:52,874 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 48 changer transitions 0/638 dead transitions. [2024-06-28 00:41:52,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 638 transitions, 15123 flow [2024-06-28 00:41:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:41:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:41:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:41:52,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 00:41:52,876 INFO L175 Difference]: Start difference. First operand has 351 places, 612 transitions, 13656 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:41:52,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 638 transitions, 15123 flow [2024-06-28 00:41:56,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 638 transitions, 15076 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:41:56,733 INFO L231 Difference]: Finished difference. Result has 357 places, 615 transitions, 13759 flow [2024-06-28 00:41:56,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13614, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13759, PETRI_PLACES=357, PETRI_TRANSITIONS=615} [2024-06-28 00:41:56,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-28 00:41:56,734 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 615 transitions, 13759 flow [2024-06-28 00:41:56,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:56,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:56,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:56,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:41:56,735 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:56,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash -47835971, now seen corresponding path program 3 times [2024-06-28 00:41:56,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:56,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203609227] [2024-06-28 00:41:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203609227] [2024-06-28 00:41:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203609227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:59,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:41:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361729500] [2024-06-28 00:41:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:41:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:41:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:41:59,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:59,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 615 transitions, 13759 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:59,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:59,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:59,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:02,861 INFO L124 PetriNetUnfolderBase]: 7372/11868 cut-off events. [2024-06-28 00:42:02,862 INFO L125 PetriNetUnfolderBase]: For 968874/968874 co-relation queries the response was YES. [2024-06-28 00:42:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101707 conditions, 11868 events. 7372/11868 cut-off events. For 968874/968874 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 83887 event pairs, 3307 based on Foata normal form. 6/11872 useless extension candidates. Maximal degree in co-relation 101523. Up to 11521 conditions per place. [2024-06-28 00:42:03,050 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 601 selfloop transitions, 24 changer transitions 0/630 dead transitions. [2024-06-28 00:42:03,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 630 transitions, 15063 flow [2024-06-28 00:42:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 00:42:03,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-28 00:42:03,052 INFO L175 Difference]: Start difference. First operand has 357 places, 615 transitions, 13759 flow. Second operand 8 states and 125 transitions. [2024-06-28 00:42:03,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 630 transitions, 15063 flow [2024-06-28 00:42:06,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 630 transitions, 14877 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 00:42:06,189 INFO L231 Difference]: Finished difference. Result has 358 places, 615 transitions, 13631 flow [2024-06-28 00:42:06,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13573, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13631, PETRI_PLACES=358, PETRI_TRANSITIONS=615} [2024-06-28 00:42:06,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-28 00:42:06,190 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 615 transitions, 13631 flow [2024-06-28 00:42:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:06,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:06,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:42:06,190 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:06,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash -34144839, now seen corresponding path program 1 times [2024-06-28 00:42:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118596321] [2024-06-28 00:42:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:10,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118596321] [2024-06-28 00:42:10,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118596321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:10,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:10,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:10,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323965911] [2024-06-28 00:42:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:10,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:10,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:10,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 615 transitions, 13631 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:10,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:10,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:10,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:14,515 INFO L124 PetriNetUnfolderBase]: 7366/11860 cut-off events. [2024-06-28 00:42:14,515 INFO L125 PetriNetUnfolderBase]: For 964268/964268 co-relation queries the response was YES. [2024-06-28 00:42:14,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101452 conditions, 11860 events. 7366/11860 cut-off events. For 964268/964268 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 83833 event pairs, 3302 based on Foata normal form. 2/11860 useless extension candidates. Maximal degree in co-relation 101268. Up to 11479 conditions per place. [2024-06-28 00:42:14,735 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 598 selfloop transitions, 28 changer transitions 0/631 dead transitions. [2024-06-28 00:42:14,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 631 transitions, 15095 flow [2024-06-28 00:42:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:42:14,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-28 00:42:14,736 INFO L175 Difference]: Start difference. First operand has 358 places, 615 transitions, 13631 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:42:14,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 631 transitions, 15095 flow [2024-06-28 00:42:18,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 631 transitions, 15005 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 00:42:18,521 INFO L231 Difference]: Finished difference. Result has 359 places, 615 transitions, 13609 flow [2024-06-28 00:42:18,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13609, PETRI_PLACES=359, PETRI_TRANSITIONS=615} [2024-06-28 00:42:18,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-28 00:42:18,521 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 615 transitions, 13609 flow [2024-06-28 00:42:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:18,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:18,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:42:18,522 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:18,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash 138591129, now seen corresponding path program 1 times [2024-06-28 00:42:18,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:18,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386785997] [2024-06-28 00:42:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:24,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:24,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386785997] [2024-06-28 00:42:24,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386785997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:24,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:24,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:24,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727890834] [2024-06-28 00:42:24,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:24,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:24,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:24,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 615 transitions, 13609 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:28,155 INFO L124 PetriNetUnfolderBase]: 7421/11945 cut-off events. [2024-06-28 00:42:28,155 INFO L125 PetriNetUnfolderBase]: For 1030107/1030107 co-relation queries the response was YES. [2024-06-28 00:42:28,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102049 conditions, 11945 events. 7421/11945 cut-off events. For 1030107/1030107 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 84371 event pairs, 3309 based on Foata normal form. 18/11961 useless extension candidates. Maximal degree in co-relation 101864. Up to 11520 conditions per place. [2024-06-28 00:42:28,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 610 selfloop transitions, 25 changer transitions 0/640 dead transitions. [2024-06-28 00:42:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 640 transitions, 15100 flow [2024-06-28 00:42:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 00:42:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-28 00:42:28,390 INFO L175 Difference]: Start difference. First operand has 359 places, 615 transitions, 13609 flow. Second operand 8 states and 131 transitions. [2024-06-28 00:42:28,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 640 transitions, 15100 flow [2024-06-28 00:42:32,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 640 transitions, 15033 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:42:32,592 INFO L231 Difference]: Finished difference. Result has 361 places, 618 transitions, 13679 flow [2024-06-28 00:42:32,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13542, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13679, PETRI_PLACES=361, PETRI_TRANSITIONS=618} [2024-06-28 00:42:32,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-28 00:42:32,596 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 618 transitions, 13679 flow [2024-06-28 00:42:32,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:32,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:32,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:32,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:42:32,597 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:32,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 440106660, now seen corresponding path program 1 times [2024-06-28 00:42:32,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:32,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326513861] [2024-06-28 00:42:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326513861] [2024-06-28 00:42:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326513861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:35,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340357055] [2024-06-28 00:42:35,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:35,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:35,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 618 transitions, 13679 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:35,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:35,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:35,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:39,794 INFO L124 PetriNetUnfolderBase]: 7564/12188 cut-off events. [2024-06-28 00:42:39,794 INFO L125 PetriNetUnfolderBase]: For 1023788/1023788 co-relation queries the response was YES. [2024-06-28 00:42:39,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103206 conditions, 12188 events. 7564/12188 cut-off events. For 1023788/1023788 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 86284 event pairs, 2045 based on Foata normal form. 20/12207 useless extension candidates. Maximal degree in co-relation 103020. Up to 10099 conditions per place. [2024-06-28 00:42:39,945 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 495 selfloop transitions, 206 changer transitions 0/706 dead transitions. [2024-06-28 00:42:39,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 706 transitions, 16307 flow [2024-06-28 00:42:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:42:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:42:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-28 00:42:39,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-28 00:42:39,948 INFO L175 Difference]: Start difference. First operand has 361 places, 618 transitions, 13679 flow. Second operand 11 states and 222 transitions. [2024-06-28 00:42:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 706 transitions, 16307 flow [2024-06-28 00:42:44,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 706 transitions, 16181 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 00:42:44,639 INFO L231 Difference]: Finished difference. Result has 367 places, 635 transitions, 14425 flow [2024-06-28 00:42:44,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13575, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14425, PETRI_PLACES=367, PETRI_TRANSITIONS=635} [2024-06-28 00:42:44,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-28 00:42:44,640 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 635 transitions, 14425 flow [2024-06-28 00:42:44,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:44,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:44,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:42:44,641 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:44,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash -886704418, now seen corresponding path program 2 times [2024-06-28 00:42:44,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:44,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025437925] [2024-06-28 00:42:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:47,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:47,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025437925] [2024-06-28 00:42:47,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025437925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:47,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:47,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124373557] [2024-06-28 00:42:47,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:47,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 00:42:47,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 635 transitions, 14425 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:47,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:47,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 00:42:47,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:51,193 INFO L124 PetriNetUnfolderBase]: 6164/10667 cut-off events. [2024-06-28 00:42:51,193 INFO L125 PetriNetUnfolderBase]: For 1001378/1001824 co-relation queries the response was YES. [2024-06-28 00:42:51,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94990 conditions, 10667 events. 6164/10667 cut-off events. For 1001378/1001824 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 82048 event pairs, 1000 based on Foata normal form. 164/10553 useless extension candidates. Maximal degree in co-relation 94802. Up to 6246 conditions per place. [2024-06-28 00:42:51,335 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 326 selfloop transitions, 228 changer transitions 0/704 dead transitions. [2024-06-28 00:42:51,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 704 transitions, 16388 flow [2024-06-28 00:42:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-28 00:42:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-28 00:42:51,337 INFO L175 Difference]: Start difference. First operand has 367 places, 635 transitions, 14425 flow. Second operand 10 states and 218 transitions. [2024-06-28 00:42:51,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 704 transitions, 16388 flow [2024-06-28 00:42:55,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 704 transitions, 16172 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 00:42:55,133 INFO L231 Difference]: Finished difference. Result has 371 places, 646 transitions, 14999 flow [2024-06-28 00:42:55,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14093, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14999, PETRI_PLACES=371, PETRI_TRANSITIONS=646} [2024-06-28 00:42:55,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-28 00:42:55,134 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 646 transitions, 14999 flow [2024-06-28 00:42:55,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:55,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:55,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:42:55,135 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:55,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1393964958, now seen corresponding path program 1 times [2024-06-28 00:42:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727797100] [2024-06-28 00:42:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727797100] [2024-06-28 00:42:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727797100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:57,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:42:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824819664] [2024-06-28 00:42:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:42:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:42:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:42:57,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:57,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 646 transitions, 14999 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:57,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:57,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:57,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:01,795 INFO L124 PetriNetUnfolderBase]: 7724/12441 cut-off events. [2024-06-28 00:43:01,796 INFO L125 PetriNetUnfolderBase]: For 1035367/1035369 co-relation queries the response was YES. [2024-06-28 00:43:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108738 conditions, 12441 events. 7724/12441 cut-off events. For 1035367/1035369 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 88428 event pairs, 2540 based on Foata normal form. 2/12442 useless extension candidates. Maximal degree in co-relation 108547. Up to 11686 conditions per place. [2024-06-28 00:43:01,967 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 581 selfloop transitions, 118 changer transitions 0/704 dead transitions. [2024-06-28 00:43:01,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 704 transitions, 17627 flow [2024-06-28 00:43:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:43:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:43:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:43:01,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 00:43:01,969 INFO L175 Difference]: Start difference. First operand has 371 places, 646 transitions, 14999 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:43:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 704 transitions, 17627 flow