./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:37:06,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:37:07,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:37:07,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:37:07,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:37:07,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:37:07,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:37:07,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:37:07,104 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:37:07,107 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:37:07,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:37:07,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:37:07,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:37:07,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:37:07,110 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:37:07,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:37:07,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:37:07,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:37:07,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:37:07,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:37:07,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:37:07,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:37:07,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:37:07,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:37:07,113 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:37:07,113 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:37:07,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:37:07,114 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:37:07,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:37:07,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:37:07,115 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:37:07,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:37:07,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:37:07,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:37:07,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:37:07,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:37:07,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:37:07,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:37:07,117 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:37:07,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:37:07,117 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:37:07,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:37:07,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:37:07,118 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:37:07,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:37:07,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:37:07,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:37:07,391 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:37:07,392 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:37:07,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-21 19:37:08,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:37:08,625 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:37:08,626 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-21 19:37:08,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e0962e6/7e4ed226d2eb4dcf86fc3d6440b143d4/FLAG8af2ec0bb [2024-06-21 19:37:08,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e0962e6/7e4ed226d2eb4dcf86fc3d6440b143d4 [2024-06-21 19:37:08,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:37:08,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:37:08,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_power.oepc.yml/witness.yml [2024-06-21 19:37:08,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:37:08,743 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:37:08,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:37:08,744 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:37:08,748 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:37:08,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:37:08" (1/2) ... [2024-06-21 19:37:08,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cf24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:37:08, skipping insertion in model container [2024-06-21 19:37:08,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:37:08" (1/2) ... [2024-06-21 19:37:08,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79ad3165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:37:08, skipping insertion in model container [2024-06-21 19:37:08,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:37:08" (2/2) ... [2024-06-21 19:37:08,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cf24c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:08, skipping insertion in model container [2024-06-21 19:37:08,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:37:08" (2/2) ... [2024-06-21 19:37:08,753 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:37:08,780 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:37:08,781 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:37:08,781 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:37:08,781 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:37:08,782 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:37:08,782 INFO L106 edCorrectnessWitness]: ghost_update [L833-L833] multithreaded = 1; [2024-06-21 19:37:08,822 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:37:09,144 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:37:09,157 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:37:09,328 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:37:09,363 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:37:09,364 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09 WrapperNode [2024-06-21 19:37:09,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:37:09,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:37:09,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:37:09,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:37:09,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,387 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,434 INFO L138 Inliner]: procedures = 175, calls = 59, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 145 [2024-06-21 19:37:09,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:37:09,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:37:09,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:37:09,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:37:09,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,462 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,494 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 19:37:09,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,536 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,549 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:37:09,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:37:09,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:37:09,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:37:09,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (1/1) ... [2024-06-21 19:37:09,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:37:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:37:09,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 19:37:09,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 19:37:09,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:37:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:37:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:37:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:37:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:37:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:37:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:37:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:37:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:37:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:37:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:37:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:37:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:37:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:37:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:37:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:37:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:37:09,641 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:37:09,781 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:37:09,783 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:37:10,355 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:37:10,356 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:37:10,601 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:37:10,601 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:37:10,601 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:37:10 BoogieIcfgContainer [2024-06-21 19:37:10,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:37:10,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:37:10,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:37:10,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:37:10,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:37:08" (1/4) ... [2024-06-21 19:37:10,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0f418d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:37:10, skipping insertion in model container [2024-06-21 19:37:10,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:37:08" (2/4) ... [2024-06-21 19:37:10,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0f418d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:37:10, skipping insertion in model container [2024-06-21 19:37:10,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:37:09" (3/4) ... [2024-06-21 19:37:10,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0f418d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:37:10, skipping insertion in model container [2024-06-21 19:37:10,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:37:10" (4/4) ... [2024-06-21 19:37:10,610 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.oepc.i [2024-06-21 19:37:10,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:37:10,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:37:10,624 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:37:10,677 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:37:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 19:37:10,732 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 19:37:10,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:37:10,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:37:10,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 19:37:10,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 19:37:10,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:37:10,751 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;@6fe4427d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:37:10,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:37:10,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:37:10,756 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:37:10,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:37:10,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:10,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:37:10,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:10,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash 599122186, now seen corresponding path program 1 times [2024-06-21 19:37:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574127694] [2024-06-21 19:37:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:12,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574127694] [2024-06-21 19:37:12,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574127694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:12,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:12,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:37:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407449215] [2024-06-21 19:37:12,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:12,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:37:12,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:37:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:37:12,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 19:37:12,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:12,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:12,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 19:37:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:13,184 INFO L124 PetriNetUnfolderBase]: 602/990 cut-off events. [2024-06-21 19:37:13,184 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 19:37:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 990 events. 602/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4666 event pairs, 367 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 1965. Up to 930 conditions per place. [2024-06-21 19:37:13,195 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 19:37:13,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 175 flow [2024-06-21 19:37:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:37:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:37:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 19:37:13,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 19:37:13,207 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-21 19:37:13,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 175 flow [2024-06-21 19:37:13,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:37:13,212 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 19:37:13,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 19:37:13,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 19:37:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 19:37:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:13,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:13,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:13,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:37:13,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:13,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 231670063, now seen corresponding path program 1 times [2024-06-21 19:37:13,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:13,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594105930] [2024-06-21 19:37:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:16,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:16,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594105930] [2024-06-21 19:37:16,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594105930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:16,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:16,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:37:16,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952977966] [2024-06-21 19:37:16,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:37:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:37:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:37:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 19:37:16,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:16,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:16,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 19:37:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:16,938 INFO L124 PetriNetUnfolderBase]: 596/982 cut-off events. [2024-06-21 19:37:16,938 INFO L125 PetriNetUnfolderBase]: For 207/215 co-relation queries the response was YES. [2024-06-21 19:37:16,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 982 events. 596/982 cut-off events. For 207/215 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4645 event pairs, 277 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 2264. Up to 902 conditions per place. [2024-06-21 19:37:16,943 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 19:37:16,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 250 flow [2024-06-21 19:37:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:37:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:37:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-21 19:37:16,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 19:37:16,945 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 95 transitions. [2024-06-21 19:37:16,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 250 flow [2024-06-21 19:37:16,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:37:16,947 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 19:37:16,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 19:37:16,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 19:37:16,948 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 19:37:16,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:16,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:16,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:16,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:37:16,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:16,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -328577005, now seen corresponding path program 1 times [2024-06-21 19:37:16,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:16,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490982246] [2024-06-21 19:37:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:20,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:20,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490982246] [2024-06-21 19:37:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490982246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:20,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:20,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:37:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614613144] [2024-06-21 19:37:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:20,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:37:20,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:37:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:37:20,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 19:37:20,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:20,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:20,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 19:37:20,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:21,430 INFO L124 PetriNetUnfolderBase]: 754/1210 cut-off events. [2024-06-21 19:37:21,430 INFO L125 PetriNetUnfolderBase]: For 709/725 co-relation queries the response was YES. [2024-06-21 19:37:21,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1210 events. 754/1210 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5590 event pairs, 215 based on Foata normal form. 12/1221 useless extension candidates. Maximal degree in co-relation 3130. Up to 1079 conditions per place. [2024-06-21 19:37:21,437 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-21 19:37:21,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 374 flow [2024-06-21 19:37:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:37:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:37:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 19:37:21,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-21 19:37:21,439 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 131 transitions. [2024-06-21 19:37:21,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 374 flow [2024-06-21 19:37:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:37:21,442 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-21 19:37:21,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 19:37:21,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-21 19:37:21,442 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-21 19:37:21,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:21,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:21,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:21,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:37:21,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:21,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1477432738, now seen corresponding path program 1 times [2024-06-21 19:37:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801116123] [2024-06-21 19:37:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:23,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:23,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801116123] [2024-06-21 19:37:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801116123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:23,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:23,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:37:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822282550] [2024-06-21 19:37:23,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:37:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:37:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:37:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:23,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:24,078 INFO L124 PetriNetUnfolderBase]: 863/1371 cut-off events. [2024-06-21 19:37:24,079 INFO L125 PetriNetUnfolderBase]: For 1467/1469 co-relation queries the response was YES. [2024-06-21 19:37:24,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 1371 events. 863/1371 cut-off events. For 1467/1469 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6373 event pairs, 316 based on Foata normal form. 6/1377 useless extension candidates. Maximal degree in co-relation 3892. Up to 1268 conditions per place. [2024-06-21 19:37:24,086 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 19:37:24,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 392 flow [2024-06-21 19:37:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:37:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:37:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 19:37:24,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 19:37:24,089 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 92 transitions. [2024-06-21 19:37:24,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 392 flow [2024-06-21 19:37:24,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 357 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:37:24,092 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 238 flow [2024-06-21 19:37:24,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-06-21 19:37:24,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-21 19:37:24,093 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 238 flow [2024-06-21 19:37:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:24,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:24,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:24,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:37:24,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:24,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash -934682271, now seen corresponding path program 1 times [2024-06-21 19:37:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782760067] [2024-06-21 19:37:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:24,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782760067] [2024-06-21 19:37:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782760067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:37:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286415270] [2024-06-21 19:37:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:37:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:37:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:37:26,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:26,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:26,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:26,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:26,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:27,471 INFO L124 PetriNetUnfolderBase]: 847/1347 cut-off events. [2024-06-21 19:37:27,471 INFO L125 PetriNetUnfolderBase]: For 1965/1971 co-relation queries the response was YES. [2024-06-21 19:37:27,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4163 conditions, 1347 events. 847/1347 cut-off events. For 1965/1971 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6215 event pairs, 278 based on Foata normal form. 14/1361 useless extension candidates. Maximal degree in co-relation 4141. Up to 1188 conditions per place. [2024-06-21 19:37:27,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-21 19:37:27,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 458 flow [2024-06-21 19:37:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:37:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:37:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:37:27,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-21 19:37:27,485 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 238 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:37:27,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 458 flow [2024-06-21 19:37:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 456 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:37:27,495 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 283 flow [2024-06-21 19:37:27,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-21 19:37:27,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-21 19:37:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 283 flow [2024-06-21 19:37:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:37:27,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1265478468, now seen corresponding path program 1 times [2024-06-21 19:37:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141764104] [2024-06-21 19:37:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141764104] [2024-06-21 19:37:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141764104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:30,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:30,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289816777] [2024-06-21 19:37:30,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:30,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:30,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:30,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 283 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:30,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:30,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:30,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:31,696 INFO L124 PetriNetUnfolderBase]: 945/1511 cut-off events. [2024-06-21 19:37:31,696 INFO L125 PetriNetUnfolderBase]: For 3004/3010 co-relation queries the response was YES. [2024-06-21 19:37:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4940 conditions, 1511 events. 945/1511 cut-off events. For 3004/3010 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7221 event pairs, 267 based on Foata normal form. 13/1524 useless extension candidates. Maximal degree in co-relation 4914. Up to 1303 conditions per place. [2024-06-21 19:37:31,706 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 64 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-21 19:37:31,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 652 flow [2024-06-21 19:37:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:37:31,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 19:37:31,708 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 283 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:37:31,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 652 flow [2024-06-21 19:37:31,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 621 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:37:31,712 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 439 flow [2024-06-21 19:37:31,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=439, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-21 19:37:31,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 19:37:31,713 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 439 flow [2024-06-21 19:37:31,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:31,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:31,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:37:31,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:31,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1294197798, now seen corresponding path program 2 times [2024-06-21 19:37:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:31,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970789621] [2024-06-21 19:37:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970789621] [2024-06-21 19:37:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970789621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:34,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809082504] [2024-06-21 19:37:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:34,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:34,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:34,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:34,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:34,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:35,336 INFO L124 PetriNetUnfolderBase]: 958/1528 cut-off events. [2024-06-21 19:37:35,337 INFO L125 PetriNetUnfolderBase]: For 5112/5118 co-relation queries the response was YES. [2024-06-21 19:37:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 1528 events. 958/1528 cut-off events. For 5112/5118 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7216 event pairs, 305 based on Foata normal form. 4/1532 useless extension candidates. Maximal degree in co-relation 5837. Up to 1342 conditions per place. [2024-06-21 19:37:35,346 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-21 19:37:35,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 826 flow [2024-06-21 19:37:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:37:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:37:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 19:37:35,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 19:37:35,348 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 439 flow. Second operand 6 states and 113 transitions. [2024-06-21 19:37:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 826 flow [2024-06-21 19:37:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 804 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 19:37:35,354 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 609 flow [2024-06-21 19:37:35,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-21 19:37:35,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 19:37:35,355 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 609 flow [2024-06-21 19:37:35,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:35,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:35,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:37:35,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:35,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 739472720, now seen corresponding path program 3 times [2024-06-21 19:37:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417434491] [2024-06-21 19:37:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417434491] [2024-06-21 19:37:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417434491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:37,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385298688] [2024-06-21 19:37:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:37,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:37,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 609 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:37,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:37,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:38,497 INFO L124 PetriNetUnfolderBase]: 985/1581 cut-off events. [2024-06-21 19:37:38,497 INFO L125 PetriNetUnfolderBase]: For 7039/7045 co-relation queries the response was YES. [2024-06-21 19:37:38,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1581 events. 985/1581 cut-off events. For 7039/7045 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7569 event pairs, 294 based on Foata normal form. 19/1600 useless extension candidates. Maximal degree in co-relation 6481. Up to 1304 conditions per place. [2024-06-21 19:37:38,511 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 59 selfloop transitions, 45 changer transitions 0/109 dead transitions. [2024-06-21 19:37:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 933 flow [2024-06-21 19:37:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:37:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:37:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:37:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:37:38,514 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 609 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:37:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 933 flow [2024-06-21 19:37:38,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 897 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 19:37:38,525 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 786 flow [2024-06-21 19:37:38,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-21 19:37:38,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 19:37:38,527 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 786 flow [2024-06-21 19:37:38,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:38,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:38,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:37:38,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:38,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1075064549, now seen corresponding path program 1 times [2024-06-21 19:37:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541490315] [2024-06-21 19:37:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:41,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541490315] [2024-06-21 19:37:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541490315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:41,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:41,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282400156] [2024-06-21 19:37:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:41,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 786 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:41,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:41,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:43,524 INFO L124 PetriNetUnfolderBase]: 1574/2586 cut-off events. [2024-06-21 19:37:43,524 INFO L125 PetriNetUnfolderBase]: For 16397/16405 co-relation queries the response was YES. [2024-06-21 19:37:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11228 conditions, 2586 events. 1574/2586 cut-off events. For 16397/16405 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14268 event pairs, 444 based on Foata normal form. 56/2642 useless extension candidates. Maximal degree in co-relation 11189. Up to 1374 conditions per place. [2024-06-21 19:37:43,542 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 107 selfloop transitions, 41 changer transitions 1/154 dead transitions. [2024-06-21 19:37:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 154 transitions, 1358 flow [2024-06-21 19:37:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:37:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:37:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 19:37:43,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-21 19:37:43,545 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 786 flow. Second operand 11 states and 201 transitions. [2024-06-21 19:37:43,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 154 transitions, 1358 flow [2024-06-21 19:37:43,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 154 transitions, 1278 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:43,563 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 849 flow [2024-06-21 19:37:43,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-21 19:37:43,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-21 19:37:43,564 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 849 flow [2024-06-21 19:37:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:43,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:43,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:43,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:37:43,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:43,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 649109347, now seen corresponding path program 2 times [2024-06-21 19:37:43,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197320846] [2024-06-21 19:37:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197320846] [2024-06-21 19:37:46,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197320846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:46,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:46,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:46,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824479712] [2024-06-21 19:37:46,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:46,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:46,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:46,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 849 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:46,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:46,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:46,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:48,300 INFO L124 PetriNetUnfolderBase]: 1459/2409 cut-off events. [2024-06-21 19:37:48,300 INFO L125 PetriNetUnfolderBase]: For 15286/15294 co-relation queries the response was YES. [2024-06-21 19:37:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10315 conditions, 2409 events. 1459/2409 cut-off events. For 15286/15294 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13264 event pairs, 472 based on Foata normal form. 66/2475 useless extension candidates. Maximal degree in co-relation 10275. Up to 1828 conditions per place. [2024-06-21 19:37:48,313 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 88 selfloop transitions, 33 changer transitions 11/137 dead transitions. [2024-06-21 19:37:48,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 137 transitions, 1262 flow [2024-06-21 19:37:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:37:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:37:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 19:37:48,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-21 19:37:48,319 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 849 flow. Second operand 10 states and 174 transitions. [2024-06-21 19:37:48,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 137 transitions, 1262 flow [2024-06-21 19:37:48,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1204 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:37:48,332 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 827 flow [2024-06-21 19:37:48,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=827, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2024-06-21 19:37:48,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 19:37:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 827 flow [2024-06-21 19:37:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:48,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:48,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:37:48,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:48,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1816385595, now seen corresponding path program 3 times [2024-06-21 19:37:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679456223] [2024-06-21 19:37:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:51,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:51,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679456223] [2024-06-21 19:37:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679456223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:51,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065506183] [2024-06-21 19:37:51,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:51,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:51,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:51,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 827 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:51,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:51,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:51,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:52,583 INFO L124 PetriNetUnfolderBase]: 1374/2288 cut-off events. [2024-06-21 19:37:52,584 INFO L125 PetriNetUnfolderBase]: For 14357/14363 co-relation queries the response was YES. [2024-06-21 19:37:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10086 conditions, 2288 events. 1374/2288 cut-off events. For 14357/14363 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12429 event pairs, 466 based on Foata normal form. 18/2306 useless extension candidates. Maximal degree in co-relation 10044. Up to 1927 conditions per place. [2024-06-21 19:37:52,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 29 changer transitions 0/122 dead transitions. [2024-06-21 19:37:52,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 122 transitions, 1173 flow [2024-06-21 19:37:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:37:52,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 19:37:52,600 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 827 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:37:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 122 transitions, 1173 flow [2024-06-21 19:37:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 1092 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 19:37:52,614 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 825 flow [2024-06-21 19:37:52,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-21 19:37:52,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 19:37:52,615 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 825 flow [2024-06-21 19:37:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:52,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:52,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:37:52,615 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:52,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash 764584967, now seen corresponding path program 1 times [2024-06-21 19:37:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:52,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556642940] [2024-06-21 19:37:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556642940] [2024-06-21 19:37:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556642940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:55,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:55,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677362948] [2024-06-21 19:37:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:55,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:55,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:55,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 825 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:55,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:55,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:55,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:56,687 INFO L124 PetriNetUnfolderBase]: 1538/2572 cut-off events. [2024-06-21 19:37:56,687 INFO L125 PetriNetUnfolderBase]: For 17365/17371 co-relation queries the response was YES. [2024-06-21 19:37:56,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11373 conditions, 2572 events. 1538/2572 cut-off events. For 17365/17371 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14361 event pairs, 439 based on Foata normal form. 14/2586 useless extension candidates. Maximal degree in co-relation 11331. Up to 1809 conditions per place. [2024-06-21 19:37:56,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 33 changer transitions 0/132 dead transitions. [2024-06-21 19:37:56,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1287 flow [2024-06-21 19:37:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:37:56,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 19:37:56,705 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 825 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:37:56,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1287 flow [2024-06-21 19:37:56,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 1218 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:56,721 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 894 flow [2024-06-21 19:37:56,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=894, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-06-21 19:37:56,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 19:37:56,722 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 894 flow [2024-06-21 19:37:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:56,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:56,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:37:56,722 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:56,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1960869487, now seen corresponding path program 4 times [2024-06-21 19:37:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092215312] [2024-06-21 19:37:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092215312] [2024-06-21 19:37:59,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092215312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:59,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375632082] [2024-06-21 19:37:59,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:59,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:59,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:37:59,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:59,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:59,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:37:59,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:00,648 INFO L124 PetriNetUnfolderBase]: 2262/3780 cut-off events. [2024-06-21 19:38:00,649 INFO L125 PetriNetUnfolderBase]: For 32625/32631 co-relation queries the response was YES. [2024-06-21 19:38:00,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16956 conditions, 3780 events. 2262/3780 cut-off events. For 32625/32631 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22899 event pairs, 537 based on Foata normal form. 62/3842 useless extension candidates. Maximal degree in co-relation 16913. Up to 1593 conditions per place. [2024-06-21 19:38:00,668 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 93 selfloop transitions, 57 changer transitions 1/156 dead transitions. [2024-06-21 19:38:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1530 flow [2024-06-21 19:38:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 19:38:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 19:38:00,669 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 894 flow. Second operand 9 states and 175 transitions. [2024-06-21 19:38:00,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1530 flow [2024-06-21 19:38:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1483 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 19:38:00,700 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 1125 flow [2024-06-21 19:38:00,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1125, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-21 19:38:00,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 19:38:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 1125 flow [2024-06-21 19:38:00,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:00,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:00,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:00,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:38:00,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1963726447, now seen corresponding path program 5 times [2024-06-21 19:38:00,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:00,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022713506] [2024-06-21 19:38:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:00,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022713506] [2024-06-21 19:38:03,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022713506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:03,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:03,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:03,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440286058] [2024-06-21 19:38:03,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:03,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:03,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:03,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:03,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:03,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:03,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:04,491 INFO L124 PetriNetUnfolderBase]: 2091/3529 cut-off events. [2024-06-21 19:38:04,491 INFO L125 PetriNetUnfolderBase]: For 33661/33667 co-relation queries the response was YES. [2024-06-21 19:38:04,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16032 conditions, 3529 events. 2091/3529 cut-off events. For 33661/33667 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21434 event pairs, 647 based on Foata normal form. 84/3613 useless extension candidates. Maximal degree in co-relation 15986. Up to 2569 conditions per place. [2024-06-21 19:38:04,513 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 88 selfloop transitions, 45 changer transitions 2/140 dead transitions. [2024-06-21 19:38:04,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1530 flow [2024-06-21 19:38:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:38:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:38:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:38:04,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 19:38:04,515 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 1125 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:38:04,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1530 flow [2024-06-21 19:38:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 140 transitions, 1406 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 19:38:04,564 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 1119 flow [2024-06-21 19:38:04,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-21 19:38:04,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 19:38:04,565 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 1119 flow [2024-06-21 19:38:04,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:04,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:04,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:04,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:38:04,566 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:04,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -308276207, now seen corresponding path program 6 times [2024-06-21 19:38:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:04,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64979425] [2024-06-21 19:38:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64979425] [2024-06-21 19:38:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64979425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:06,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:38:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384513864] [2024-06-21 19:38:06,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:06,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:38:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:38:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:38:06,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 19:38:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 1119 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) [2024-06-21 19:38:06,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:06,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 19:38:06,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:07,625 INFO L124 PetriNetUnfolderBase]: 1517/2846 cut-off events. [2024-06-21 19:38:07,625 INFO L125 PetriNetUnfolderBase]: For 27847/27923 co-relation queries the response was YES. [2024-06-21 19:38:07,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12407 conditions, 2846 events. 1517/2846 cut-off events. For 27847/27923 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19183 event pairs, 258 based on Foata normal form. 121/2850 useless extension candidates. Maximal degree in co-relation 12362. Up to 1071 conditions per place. [2024-06-21 19:38:07,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 38 changer transitions 18/132 dead transitions. [2024-06-21 19:38:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 132 transitions, 1431 flow [2024-06-21 19:38:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 19:38:07,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-21 19:38:07,645 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 1119 flow. Second operand 7 states and 137 transitions. [2024-06-21 19:38:07,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 132 transitions, 1431 flow [2024-06-21 19:38:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 132 transitions, 1347 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:07,680 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 1024 flow [2024-06-21 19:38:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1024, PETRI_PLACES=100, PETRI_TRANSITIONS=93} [2024-06-21 19:38:07,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 19:38:07,681 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 1024 flow [2024-06-21 19:38:07,681 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) [2024-06-21 19:38:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:07,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:38:07,682 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114985, now seen corresponding path program 2 times [2024-06-21 19:38:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681622008] [2024-06-21 19:38:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681622008] [2024-06-21 19:38:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681622008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972011839] [2024-06-21 19:38:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:11,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:11,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 1024 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:11,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:11,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:11,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:13,400 INFO L124 PetriNetUnfolderBase]: 1550/2608 cut-off events. [2024-06-21 19:38:13,400 INFO L125 PetriNetUnfolderBase]: For 22702/22708 co-relation queries the response was YES. [2024-06-21 19:38:13,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12330 conditions, 2608 events. 1550/2608 cut-off events. For 22702/22708 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14678 event pairs, 494 based on Foata normal form. 14/2622 useless extension candidates. Maximal degree in co-relation 12283. Up to 1753 conditions per place. [2024-06-21 19:38:13,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 91 selfloop transitions, 35 changer transitions 1/132 dead transitions. [2024-06-21 19:38:13,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1396 flow [2024-06-21 19:38:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:38:13,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 19:38:13,420 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 1024 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:38:13,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1396 flow [2024-06-21 19:38:13,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 132 transitions, 1312 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:38:13,449 INFO L231 Difference]: Finished difference. Result has 100 places, 92 transitions, 987 flow [2024-06-21 19:38:13,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=100, PETRI_TRANSITIONS=92} [2024-06-21 19:38:13,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 19:38:13,450 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 987 flow [2024-06-21 19:38:13,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:13,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:13,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:38:13,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:13,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 678071940, now seen corresponding path program 1 times [2024-06-21 19:38:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774635671] [2024-06-21 19:38:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774635671] [2024-06-21 19:38:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774635671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:15,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:15,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:38:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922091822] [2024-06-21 19:38:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:15,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:38:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:38:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:38:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 987 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) [2024-06-21 19:38:15,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:15,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:15,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:16,787 INFO L124 PetriNetUnfolderBase]: 1456/2455 cut-off events. [2024-06-21 19:38:16,787 INFO L125 PetriNetUnfolderBase]: For 19269/19276 co-relation queries the response was YES. [2024-06-21 19:38:16,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11455 conditions, 2455 events. 1456/2455 cut-off events. For 19269/19276 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14058 event pairs, 544 based on Foata normal form. 9/2464 useless extension candidates. Maximal degree in co-relation 11411. Up to 2243 conditions per place. [2024-06-21 19:38:16,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 88 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-06-21 19:38:16,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 118 transitions, 1381 flow [2024-06-21 19:38:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:38:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:38:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 19:38:16,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 19:38:16,800 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 987 flow. Second operand 6 states and 106 transitions. [2024-06-21 19:38:16,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 118 transitions, 1381 flow [2024-06-21 19:38:16,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 118 transitions, 1281 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:38:16,820 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 1052 flow [2024-06-21 19:38:16,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1052, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2024-06-21 19:38:16,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 19:38:16,821 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 1052 flow [2024-06-21 19:38:16,821 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) [2024-06-21 19:38:16,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:16,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:38:16,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash 406409470, now seen corresponding path program 1 times [2024-06-21 19:38:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:16,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780827138] [2024-06-21 19:38:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780827138] [2024-06-21 19:38:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780827138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:21,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:21,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:21,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821183814] [2024-06-21 19:38:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:21,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 19:38:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 1052 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 19:38:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:22,478 INFO L124 PetriNetUnfolderBase]: 1349/2332 cut-off events. [2024-06-21 19:38:22,478 INFO L125 PetriNetUnfolderBase]: For 17488/17490 co-relation queries the response was YES. [2024-06-21 19:38:22,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10751 conditions, 2332 events. 1349/2332 cut-off events. For 17488/17490 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13514 event pairs, 412 based on Foata normal form. 8/2330 useless extension candidates. Maximal degree in co-relation 10705. Up to 2050 conditions per place. [2024-06-21 19:38:22,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 31 changer transitions 0/137 dead transitions. [2024-06-21 19:38:22,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 137 transitions, 1462 flow [2024-06-21 19:38:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 19:38:22,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 19:38:22,493 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 1052 flow. Second operand 10 states and 165 transitions. [2024-06-21 19:38:22,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 137 transitions, 1462 flow [2024-06-21 19:38:22,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 137 transitions, 1450 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 19:38:22,514 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 1236 flow [2024-06-21 19:38:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1236, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-06-21 19:38:22,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 19:38:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 1236 flow [2024-06-21 19:38:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:22,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:22,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:22,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:38:22,515 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:22,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash 53708190, now seen corresponding path program 1 times [2024-06-21 19:38:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:22,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110497812] [2024-06-21 19:38:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:25,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110497812] [2024-06-21 19:38:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110497812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:25,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:25,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:38:25,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303887822] [2024-06-21 19:38:25,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:25,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:38:25,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:38:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:38:25,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:25,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 1236 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:25,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:25,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:26,564 INFO L124 PetriNetUnfolderBase]: 1451/2444 cut-off events. [2024-06-21 19:38:26,564 INFO L125 PetriNetUnfolderBase]: For 23013/23013 co-relation queries the response was YES. [2024-06-21 19:38:26,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12037 conditions, 2444 events. 1451/2444 cut-off events. For 23013/23013 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14144 event pairs, 782 based on Foata normal form. 1/2436 useless extension candidates. Maximal degree in co-relation 11986. Up to 2274 conditions per place. [2024-06-21 19:38:26,578 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-21 19:38:26,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1785 flow [2024-06-21 19:38:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 19:38:26,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 19:38:26,580 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 1236 flow. Second operand 7 states and 119 transitions. [2024-06-21 19:38:26,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1785 flow [2024-06-21 19:38:26,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 147 transitions, 1727 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 19:38:26,607 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 1449 flow [2024-06-21 19:38:26,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1449, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-06-21 19:38:26,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-21 19:38:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 1449 flow [2024-06-21 19:38:26,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:26,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:26,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:38:26,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:26,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -292464573, now seen corresponding path program 1 times [2024-06-21 19:38:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363178118] [2024-06-21 19:38:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:30,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363178118] [2024-06-21 19:38:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363178118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:30,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200610175] [2024-06-21 19:38:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:30,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:30,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:30,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:30,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:30,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:31,544 INFO L124 PetriNetUnfolderBase]: 1448/2445 cut-off events. [2024-06-21 19:38:31,545 INFO L125 PetriNetUnfolderBase]: For 23766/23770 co-relation queries the response was YES. [2024-06-21 19:38:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 2445 events. 1448/2445 cut-off events. For 23766/23770 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13800 event pairs, 444 based on Foata normal form. 2/2445 useless extension candidates. Maximal degree in co-relation 12366. Up to 2251 conditions per place. [2024-06-21 19:38:31,559 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 110 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-21 19:38:31,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 141 transitions, 1770 flow [2024-06-21 19:38:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:38:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:38:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 19:38:31,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 19:38:31,569 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 1449 flow. Second operand 8 states and 120 transitions. [2024-06-21 19:38:31,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 141 transitions, 1770 flow [2024-06-21 19:38:31,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 141 transitions, 1716 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-21 19:38:31,601 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 1485 flow [2024-06-21 19:38:31,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-06-21 19:38:31,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 19:38:31,602 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 1485 flow [2024-06-21 19:38:31,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:31,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:31,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:31,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:38:31,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:31,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1320946399, now seen corresponding path program 1 times [2024-06-21 19:38:31,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:31,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833350162] [2024-06-21 19:38:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:31,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:34,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833350162] [2024-06-21 19:38:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833350162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:34,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:34,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:38:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274587583] [2024-06-21 19:38:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:38:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:38:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:38:34,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:34,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:34,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:34,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:34,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:35,530 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-06-21 19:38:35,530 INFO L125 PetriNetUnfolderBase]: For 27152/27157 co-relation queries the response was YES. [2024-06-21 19:38:35,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12792 conditions, 2487 events. 1477/2487 cut-off events. For 27152/27157 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14190 event pairs, 490 based on Foata normal form. 9/2496 useless extension candidates. Maximal degree in co-relation 12731. Up to 2159 conditions per place. [2024-06-21 19:38:35,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 42 changer transitions 0/162 dead transitions. [2024-06-21 19:38:35,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 162 transitions, 2006 flow [2024-06-21 19:38:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 19:38:35,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 19:38:35,544 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 1485 flow. Second operand 7 states and 124 transitions. [2024-06-21 19:38:35,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 162 transitions, 2006 flow [2024-06-21 19:38:35,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 162 transitions, 1915 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:35,576 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1609 flow [2024-06-21 19:38:35,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1609, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-21 19:38:35,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 19:38:35,577 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1609 flow [2024-06-21 19:38:35,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:35,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:35,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:38:35,577 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:35,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1662153639, now seen corresponding path program 2 times [2024-06-21 19:38:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522108479] [2024-06-21 19:38:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522108479] [2024-06-21 19:38:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522108479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:38,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:38:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696275474] [2024-06-21 19:38:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:38:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:38:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:38:38,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:38,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1609 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:38,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:38,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:38,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:39,939 INFO L124 PetriNetUnfolderBase]: 1480/2495 cut-off events. [2024-06-21 19:38:39,939 INFO L125 PetriNetUnfolderBase]: For 29281/29286 co-relation queries the response was YES. [2024-06-21 19:38:39,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13221 conditions, 2495 events. 1480/2495 cut-off events. For 29281/29286 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14327 event pairs, 570 based on Foata normal form. 9/2504 useless extension candidates. Maximal degree in co-relation 13158. Up to 2270 conditions per place. [2024-06-21 19:38:39,958 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 35 changer transitions 0/158 dead transitions. [2024-06-21 19:38:39,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 2004 flow [2024-06-21 19:38:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 19:38:39,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 19:38:39,961 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1609 flow. Second operand 7 states and 118 transitions. [2024-06-21 19:38:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 2004 flow [2024-06-21 19:38:40,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 158 transitions, 1947 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 19:38:40,007 INFO L231 Difference]: Finished difference. Result has 135 places, 140 transitions, 1663 flow [2024-06-21 19:38:40,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1663, PETRI_PLACES=135, PETRI_TRANSITIONS=140} [2024-06-21 19:38:40,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 19:38:40,008 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 140 transitions, 1663 flow [2024-06-21 19:38:40,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:40,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:40,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:40,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:38:40,008 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:40,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1664955109, now seen corresponding path program 1 times [2024-06-21 19:38:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052676972] [2024-06-21 19:38:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:43,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052676972] [2024-06-21 19:38:43,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052676972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:43,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:43,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942596761] [2024-06-21 19:38:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:43,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:43,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 140 transitions, 1663 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:43,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:43,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:43,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:45,014 INFO L124 PetriNetUnfolderBase]: 1477/2477 cut-off events. [2024-06-21 19:38:45,014 INFO L125 PetriNetUnfolderBase]: For 31658/31658 co-relation queries the response was YES. [2024-06-21 19:38:45,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13278 conditions, 2477 events. 1477/2477 cut-off events. For 31658/31658 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14327 event pairs, 786 based on Foata normal form. 1/2469 useless extension candidates. Maximal degree in co-relation 13213. Up to 2315 conditions per place. [2024-06-21 19:38:45,036 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-06-21 19:38:45,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 159 transitions, 2042 flow [2024-06-21 19:38:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 19:38:45,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 19:38:45,037 INFO L175 Difference]: Start difference. First operand has 135 places, 140 transitions, 1663 flow. Second operand 7 states and 118 transitions. [2024-06-21 19:38:45,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 159 transitions, 2042 flow [2024-06-21 19:38:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 159 transitions, 1899 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:45,078 INFO L231 Difference]: Finished difference. Result has 136 places, 141 transitions, 1594 flow [2024-06-21 19:38:45,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1594, PETRI_PLACES=136, PETRI_TRANSITIONS=141} [2024-06-21 19:38:45,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 19:38:45,078 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 141 transitions, 1594 flow [2024-06-21 19:38:45,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:45,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:45,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:45,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:38:45,079 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)] === [2024-06-21 19:38:45,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:45,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2082056624, now seen corresponding path program 1 times [2024-06-21 19:38:45,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:45,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257418311] [2024-06-21 19:38:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:45,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257418311] [2024-06-21 19:38:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257418311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:47,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575167528] [2024-06-21 19:38:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:47,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:47,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 141 transitions, 1594 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:47,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:47,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:47,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:49,001 INFO L124 PetriNetUnfolderBase]: 1507/2529 cut-off events. [2024-06-21 19:38:49,002 INFO L125 PetriNetUnfolderBase]: For 32110/32114 co-relation queries the response was YES. [2024-06-21 19:38:49,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13515 conditions, 2529 events. 1507/2529 cut-off events. For 32110/32114 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14310 event pairs, 425 based on Foata normal form. 6/2535 useless extension candidates. Maximal degree in co-relation 13449. Up to 2235 conditions per place. [2024-06-21 19:38:49,016 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 106 selfloop transitions, 56 changer transitions 0/167 dead transitions. [2024-06-21 19:38:49,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 167 transitions, 2071 flow [2024-06-21 19:38:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:38:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:38:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:38:49,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 19:38:49,017 INFO L175 Difference]: Start difference. First operand has 136 places, 141 transitions, 1594 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:38:49,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 167 transitions, 2071 flow [2024-06-21 19:38:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 167 transitions, 2017 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:38:49,055 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 1756 flow [2024-06-21 19:38:49,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1756, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2024-06-21 19:38:49,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 19:38:49,056 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 1756 flow [2024-06-21 19:38:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:49,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:49,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:49,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:38:49,057 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:49,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 680880586, now seen corresponding path program 2 times [2024-06-21 19:38:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:49,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391729799] [2024-06-21 19:38:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:52,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:52,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391729799] [2024-06-21 19:38:52,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391729799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:52,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341648946] [2024-06-21 19:38:52,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:52,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:52,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:52,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 1756 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:52,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:52,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:52,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:54,255 INFO L124 PetriNetUnfolderBase]: 1554/2602 cut-off events. [2024-06-21 19:38:54,255 INFO L125 PetriNetUnfolderBase]: For 36792/36796 co-relation queries the response was YES. [2024-06-21 19:38:54,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14669 conditions, 2602 events. 1554/2602 cut-off events. For 36792/36796 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14749 event pairs, 425 based on Foata normal form. 4/2606 useless extension candidates. Maximal degree in co-relation 14602. Up to 2210 conditions per place. [2024-06-21 19:38:54,274 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 110 selfloop transitions, 81 changer transitions 0/196 dead transitions. [2024-06-21 19:38:54,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 196 transitions, 2632 flow [2024-06-21 19:38:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 19:38:54,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-21 19:38:54,276 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 1756 flow. Second operand 11 states and 182 transitions. [2024-06-21 19:38:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 196 transitions, 2632 flow [2024-06-21 19:38:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 2487 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:38:54,326 INFO L231 Difference]: Finished difference. Result has 147 places, 166 transitions, 2095 flow [2024-06-21 19:38:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2095, PETRI_PLACES=147, PETRI_TRANSITIONS=166} [2024-06-21 19:38:54,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 19:38:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 166 transitions, 2095 flow [2024-06-21 19:38:54,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:54,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:54,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:38:54,327 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 681149356, now seen corresponding path program 3 times [2024-06-21 19:38:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731687478] [2024-06-21 19:38:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731687478] [2024-06-21 19:38:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731687478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837790489] [2024-06-21 19:38:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:57,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:38:57,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 166 transitions, 2095 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:57,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:57,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:38:57,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:59,482 INFO L124 PetriNetUnfolderBase]: 1589/2659 cut-off events. [2024-06-21 19:38:59,482 INFO L125 PetriNetUnfolderBase]: For 44163/44167 co-relation queries the response was YES. [2024-06-21 19:38:59,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15782 conditions, 2659 events. 1589/2659 cut-off events. For 44163/44167 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15096 event pairs, 429 based on Foata normal form. 4/2663 useless extension candidates. Maximal degree in co-relation 15711. Up to 2238 conditions per place. [2024-06-21 19:38:59,501 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 89 changer transitions 0/201 dead transitions. [2024-06-21 19:38:59,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 201 transitions, 2862 flow [2024-06-21 19:38:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 19:38:59,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-21 19:38:59,503 INFO L175 Difference]: Start difference. First operand has 147 places, 166 transitions, 2095 flow. Second operand 11 states and 181 transitions. [2024-06-21 19:38:59,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 201 transitions, 2862 flow [2024-06-21 19:38:59,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2649 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 19:38:59,575 INFO L231 Difference]: Finished difference. Result has 156 places, 175 transitions, 2247 flow [2024-06-21 19:38:59,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2247, PETRI_PLACES=156, PETRI_TRANSITIONS=175} [2024-06-21 19:38:59,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 19:38:59,575 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 175 transitions, 2247 flow [2024-06-21 19:38:59,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:59,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:59,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:38:59,576 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:59,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1684065610, now seen corresponding path program 4 times [2024-06-21 19:38:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:59,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745566642] [2024-06-21 19:38:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:02,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745566642] [2024-06-21 19:39:02,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745566642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:02,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:02,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932613176] [2024-06-21 19:39:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:02,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:02,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:02,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:02,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 175 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:02,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:02,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:02,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:04,118 INFO L124 PetriNetUnfolderBase]: 1604/2680 cut-off events. [2024-06-21 19:39:04,118 INFO L125 PetriNetUnfolderBase]: For 47909/47913 co-relation queries the response was YES. [2024-06-21 19:39:04,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16058 conditions, 2680 events. 1604/2680 cut-off events. For 47909/47913 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15249 event pairs, 429 based on Foata normal form. 4/2682 useless extension candidates. Maximal degree in co-relation 15982. Up to 2430 conditions per place. [2024-06-21 19:39:04,138 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 39 changer transitions 0/196 dead transitions. [2024-06-21 19:39:04,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 196 transitions, 2759 flow [2024-06-21 19:39:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 19:39:04,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-21 19:39:04,140 INFO L175 Difference]: Start difference. First operand has 156 places, 175 transitions, 2247 flow. Second operand 9 states and 137 transitions. [2024-06-21 19:39:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 196 transitions, 2759 flow [2024-06-21 19:39:04,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 196 transitions, 2620 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 19:39:04,215 INFO L231 Difference]: Finished difference. Result has 161 places, 180 transitions, 2271 flow [2024-06-21 19:39:04,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2271, PETRI_PLACES=161, PETRI_TRANSITIONS=180} [2024-06-21 19:39:04,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 19:39:04,215 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 180 transitions, 2271 flow [2024-06-21 19:39:04,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:04,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:04,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:04,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:39:04,216 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:04,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1763914403, now seen corresponding path program 1 times [2024-06-21 19:39:04,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:04,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762148862] [2024-06-21 19:39:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:04,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:09,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762148862] [2024-06-21 19:39:09,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762148862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:09,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:09,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:09,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894416221] [2024-06-21 19:39:09,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:09,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 180 transitions, 2271 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:09,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:09,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:09,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:10,548 INFO L124 PetriNetUnfolderBase]: 1622/2709 cut-off events. [2024-06-21 19:39:10,548 INFO L125 PetriNetUnfolderBase]: For 51321/51326 co-relation queries the response was YES. [2024-06-21 19:39:10,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16202 conditions, 2709 events. 1622/2709 cut-off events. For 51321/51326 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15596 event pairs, 576 based on Foata normal form. 6/2715 useless extension candidates. Maximal degree in co-relation 16124. Up to 2453 conditions per place. [2024-06-21 19:39:10,564 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 159 selfloop transitions, 51 changer transitions 0/215 dead transitions. [2024-06-21 19:39:10,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 3009 flow [2024-06-21 19:39:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:39:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:39:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:39:10,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:39:10,565 INFO L175 Difference]: Start difference. First operand has 161 places, 180 transitions, 2271 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:39:10,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 3009 flow [2024-06-21 19:39:10,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 215 transitions, 2913 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:10,640 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2431 flow [2024-06-21 19:39:10,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2431, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-21 19:39:10,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-21 19:39:10,641 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2431 flow [2024-06-21 19:39:10,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:10,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:10,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:39:10,641 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:10,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2088655523, now seen corresponding path program 2 times [2024-06-21 19:39:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671821346] [2024-06-21 19:39:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671821346] [2024-06-21 19:39:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671821346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332522438] [2024-06-21 19:39:15,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:15,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:15,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2431 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:15,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:15,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:15,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:17,094 INFO L124 PetriNetUnfolderBase]: 1617/2701 cut-off events. [2024-06-21 19:39:17,094 INFO L125 PetriNetUnfolderBase]: For 52853/52858 co-relation queries the response was YES. [2024-06-21 19:39:17,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16308 conditions, 2701 events. 1617/2701 cut-off events. For 52853/52858 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15550 event pairs, 576 based on Foata normal form. 6/2707 useless extension candidates. Maximal degree in co-relation 16229. Up to 2464 conditions per place. [2024-06-21 19:39:17,117 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 45 changer transitions 0/211 dead transitions. [2024-06-21 19:39:17,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 211 transitions, 2989 flow [2024-06-21 19:39:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:39:17,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-21 19:39:17,120 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2431 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:39:17,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 211 transitions, 2989 flow [2024-06-21 19:39:17,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 2874 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 19:39:17,210 INFO L231 Difference]: Finished difference. Result has 171 places, 193 transitions, 2462 flow [2024-06-21 19:39:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2462, PETRI_PLACES=171, PETRI_TRANSITIONS=193} [2024-06-21 19:39:17,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 19:39:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 193 transitions, 2462 flow [2024-06-21 19:39:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:17,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:39:17,212 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2089041473, now seen corresponding path program 3 times [2024-06-21 19:39:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057634018] [2024-06-21 19:39:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:21,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:21,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057634018] [2024-06-21 19:39:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057634018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:21,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:21,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299534049] [2024-06-21 19:39:21,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:21,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:21,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:21,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 193 transitions, 2462 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:21,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:21,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:21,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:22,824 INFO L124 PetriNetUnfolderBase]: 1632/2728 cut-off events. [2024-06-21 19:39:22,824 INFO L125 PetriNetUnfolderBase]: For 56578/56583 co-relation queries the response was YES. [2024-06-21 19:39:22,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16574 conditions, 2728 events. 1632/2728 cut-off events. For 56578/56583 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15788 event pairs, 546 based on Foata normal form. 8/2736 useless extension candidates. Maximal degree in co-relation 16494. Up to 2390 conditions per place. [2024-06-21 19:39:22,846 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 91 changer transitions 0/252 dead transitions. [2024-06-21 19:39:22,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 252 transitions, 3462 flow [2024-06-21 19:39:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:39:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:39:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-21 19:39:22,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 19:39:22,848 INFO L175 Difference]: Start difference. First operand has 171 places, 193 transitions, 2462 flow. Second operand 12 states and 204 transitions. [2024-06-21 19:39:22,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 252 transitions, 3462 flow [2024-06-21 19:39:22,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 252 transitions, 3372 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 19:39:22,941 INFO L231 Difference]: Finished difference. Result has 183 places, 213 transitions, 2898 flow [2024-06-21 19:39:22,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2898, PETRI_PLACES=183, PETRI_TRANSITIONS=213} [2024-06-21 19:39:22,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 19:39:22,941 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 213 transitions, 2898 flow [2024-06-21 19:39:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:22,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:22,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:39:22,942 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:22,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -282492163, now seen corresponding path program 4 times [2024-06-21 19:39:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:22,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025691760] [2024-06-21 19:39:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:22,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025691760] [2024-06-21 19:39:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025691760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:27,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913565273] [2024-06-21 19:39:27,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:27,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:27,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:27,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 213 transitions, 2898 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:27,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:27,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:27,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:29,786 INFO L124 PetriNetUnfolderBase]: 1683/2809 cut-off events. [2024-06-21 19:39:29,786 INFO L125 PetriNetUnfolderBase]: For 66702/66702 co-relation queries the response was YES. [2024-06-21 19:39:29,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18100 conditions, 2809 events. 1683/2809 cut-off events. For 66702/66702 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16153 event pairs, 410 based on Foata normal form. 6/2813 useless extension candidates. Maximal degree in co-relation 18014. Up to 2481 conditions per place. [2024-06-21 19:39:29,806 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 187 selfloop transitions, 83 changer transitions 0/275 dead transitions. [2024-06-21 19:39:29,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 275 transitions, 4276 flow [2024-06-21 19:39:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 19:39:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 19:39:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 243 transitions. [2024-06-21 19:39:29,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704268292682927 [2024-06-21 19:39:29,809 INFO L175 Difference]: Start difference. First operand has 183 places, 213 transitions, 2898 flow. Second operand 16 states and 243 transitions. [2024-06-21 19:39:29,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 275 transitions, 4276 flow [2024-06-21 19:39:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 275 transitions, 4013 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:29,911 INFO L231 Difference]: Finished difference. Result has 196 places, 243 transitions, 3425 flow [2024-06-21 19:39:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3425, PETRI_PLACES=196, PETRI_TRANSITIONS=243} [2024-06-21 19:39:29,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-21 19:39:29,911 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 243 transitions, 3425 flow [2024-06-21 19:39:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:29,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:39:29,912 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:29,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1601130680, now seen corresponding path program 1 times [2024-06-21 19:39:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015188691] [2024-06-21 19:39:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:35,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:35,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015188691] [2024-06-21 19:39:35,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015188691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:35,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619421777] [2024-06-21 19:39:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:35,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:35,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 243 transitions, 3425 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:35,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:35,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:36,325 INFO L124 PetriNetUnfolderBase]: 1702/2836 cut-off events. [2024-06-21 19:39:36,325 INFO L125 PetriNetUnfolderBase]: For 75884/75884 co-relation queries the response was YES. [2024-06-21 19:39:36,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18941 conditions, 2836 events. 1702/2836 cut-off events. For 75884/75884 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16332 event pairs, 410 based on Foata normal form. 3/2837 useless extension candidates. Maximal degree in co-relation 18853. Up to 2497 conditions per place. [2024-06-21 19:39:36,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 92 changer transitions 0/282 dead transitions. [2024-06-21 19:39:36,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 282 transitions, 4406 flow [2024-06-21 19:39:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:39:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:39:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 19:39:36,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 19:39:36,353 INFO L175 Difference]: Start difference. First operand has 196 places, 243 transitions, 3425 flow. Second operand 12 states and 195 transitions. [2024-06-21 19:39:36,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 282 transitions, 4406 flow [2024-06-21 19:39:36,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 282 transitions, 3982 flow, removed 187 selfloop flow, removed 9 redundant places. [2024-06-21 19:39:36,484 INFO L231 Difference]: Finished difference. Result has 199 places, 254 transitions, 3401 flow [2024-06-21 19:39:36,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3401, PETRI_PLACES=199, PETRI_TRANSITIONS=254} [2024-06-21 19:39:36,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 19:39:36,485 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 254 transitions, 3401 flow [2024-06-21 19:39:36,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:36,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:36,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:39:36,486 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:36,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1221168481, now seen corresponding path program 5 times [2024-06-21 19:39:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403515235] [2024-06-21 19:39:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:40,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403515235] [2024-06-21 19:39:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403515235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:40,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546524583] [2024-06-21 19:39:40,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:40,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:40,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 254 transitions, 3401 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:40,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:40,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:40,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:42,121 INFO L124 PetriNetUnfolderBase]: 1699/2824 cut-off events. [2024-06-21 19:39:42,121 INFO L125 PetriNetUnfolderBase]: For 75164/75168 co-relation queries the response was YES. [2024-06-21 19:39:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18659 conditions, 2824 events. 1699/2824 cut-off events. For 75164/75168 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16114 event pairs, 418 based on Foata normal form. 2/2824 useless extension candidates. Maximal degree in co-relation 18570. Up to 2598 conditions per place. [2024-06-21 19:39:42,143 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 231 selfloop transitions, 32 changer transitions 0/268 dead transitions. [2024-06-21 19:39:42,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 268 transitions, 4044 flow [2024-06-21 19:39:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 19:39:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-21 19:39:42,145 INFO L175 Difference]: Start difference. First operand has 199 places, 254 transitions, 3401 flow. Second operand 9 states and 134 transitions. [2024-06-21 19:39:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 268 transitions, 4044 flow [2024-06-21 19:39:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 268 transitions, 3870 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 19:39:42,280 INFO L231 Difference]: Finished difference. Result has 201 places, 255 transitions, 3316 flow [2024-06-21 19:39:42,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3316, PETRI_PLACES=201, PETRI_TRANSITIONS=255} [2024-06-21 19:39:42,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 19:39:42,281 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 255 transitions, 3316 flow [2024-06-21 19:39:42,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:42,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:42,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:42,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:39:42,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:42,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1221168822, now seen corresponding path program 5 times [2024-06-21 19:39:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:42,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132421237] [2024-06-21 19:39:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:46,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132421237] [2024-06-21 19:39:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132421237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:46,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:46,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356462014] [2024-06-21 19:39:46,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:46,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:46,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:46,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 255 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:46,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:46,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:47,997 INFO L124 PetriNetUnfolderBase]: 1696/2826 cut-off events. [2024-06-21 19:39:47,997 INFO L125 PetriNetUnfolderBase]: For 77509/77513 co-relation queries the response was YES. [2024-06-21 19:39:48,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18480 conditions, 2826 events. 1696/2826 cut-off events. For 77509/77513 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16166 event pairs, 415 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 18390. Up to 2595 conditions per place. [2024-06-21 19:39:48,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 31 changer transitions 0/268 dead transitions. [2024-06-21 19:39:48,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 268 transitions, 3882 flow [2024-06-21 19:39:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 19:39:48,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-21 19:39:48,022 INFO L175 Difference]: Start difference. First operand has 201 places, 255 transitions, 3316 flow. Second operand 9 states and 133 transitions. [2024-06-21 19:39:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 268 transitions, 3882 flow [2024-06-21 19:39:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 268 transitions, 3794 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:48,172 INFO L231 Difference]: Finished difference. Result has 204 places, 256 transitions, 3308 flow [2024-06-21 19:39:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3308, PETRI_PLACES=204, PETRI_TRANSITIONS=256} [2024-06-21 19:39:48,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 19:39:48,172 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 256 transitions, 3308 flow [2024-06-21 19:39:48,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:39:48,173 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:48,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2087020991, now seen corresponding path program 6 times [2024-06-21 19:39:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907801669] [2024-06-21 19:39:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:51,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907801669] [2024-06-21 19:39:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907801669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066883467] [2024-06-21 19:39:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:51,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:39:51,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 256 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:51,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:51,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:39:51,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:53,334 INFO L124 PetriNetUnfolderBase]: 1703/2834 cut-off events. [2024-06-21 19:39:53,334 INFO L125 PetriNetUnfolderBase]: For 80683/80683 co-relation queries the response was YES. [2024-06-21 19:39:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18612 conditions, 2834 events. 1703/2834 cut-off events. For 80683/80683 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16252 event pairs, 413 based on Foata normal form. 3/2835 useless extension candidates. Maximal degree in co-relation 18521. Up to 2499 conditions per place. [2024-06-21 19:39:53,358 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-21 19:39:53,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 287 transitions, 4231 flow [2024-06-21 19:39:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:39:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:39:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 19:39:53,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 19:39:53,360 INFO L175 Difference]: Start difference. First operand has 204 places, 256 transitions, 3308 flow. Second operand 10 states and 165 transitions. [2024-06-21 19:39:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 287 transitions, 4231 flow [2024-06-21 19:39:53,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 287 transitions, 4104 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:39:53,517 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3548 flow [2024-06-21 19:39:53,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3548, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-06-21 19:39:53,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 19:39:53,518 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3548 flow [2024-06-21 19:39:53,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:53,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:53,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:39:53,518 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:53,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1880538175, now seen corresponding path program 1 times [2024-06-21 19:39:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:53,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404800997] [2024-06-21 19:39:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:58,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404800997] [2024-06-21 19:39:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404800997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:58,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:58,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:58,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170894157] [2024-06-21 19:39:58,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:58,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:58,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 19:39:58,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3548 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:58,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:58,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 19:39:58,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:59,833 INFO L124 PetriNetUnfolderBase]: 1610/2729 cut-off events. [2024-06-21 19:39:59,834 INFO L125 PetriNetUnfolderBase]: For 87377/87403 co-relation queries the response was YES. [2024-06-21 19:39:59,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17983 conditions, 2729 events. 1610/2729 cut-off events. For 87377/87403 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16085 event pairs, 400 based on Foata normal form. 26/2744 useless extension candidates. Maximal degree in co-relation 17890. Up to 2304 conditions per place. [2024-06-21 19:39:59,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 209 selfloop transitions, 35 changer transitions 0/291 dead transitions. [2024-06-21 19:39:59,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 291 transitions, 4158 flow [2024-06-21 19:39:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:39:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:39:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 19:39:59,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:39:59,858 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3548 flow. Second operand 11 states and 176 transitions. [2024-06-21 19:39:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 291 transitions, 4158 flow [2024-06-21 19:40:00,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 291 transitions, 3972 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 19:40:00,017 INFO L231 Difference]: Finished difference. Result has 213 places, 264 transitions, 3459 flow [2024-06-21 19:40:00,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3459, PETRI_PLACES=213, PETRI_TRANSITIONS=264} [2024-06-21 19:40:00,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 19:40:00,018 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 264 transitions, 3459 flow [2024-06-21 19:40:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:00,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:00,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:00,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:40:00,019 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:00,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:00,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1013854245, now seen corresponding path program 2 times [2024-06-21 19:40:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:00,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991591502] [2024-06-21 19:40:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991591502] [2024-06-21 19:40:04,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991591502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:04,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:04,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:04,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566517370] [2024-06-21 19:40:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:04,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:04,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 19:40:04,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 264 transitions, 3459 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:04,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:04,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 19:40:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:06,020 INFO L124 PetriNetUnfolderBase]: 1594/2713 cut-off events. [2024-06-21 19:40:06,020 INFO L125 PetriNetUnfolderBase]: For 81891/81917 co-relation queries the response was YES. [2024-06-21 19:40:06,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17536 conditions, 2713 events. 1594/2713 cut-off events. For 81891/81917 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16008 event pairs, 372 based on Foata normal form. 22/2724 useless extension candidates. Maximal degree in co-relation 17442. Up to 2242 conditions per place. [2024-06-21 19:40:06,045 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 209 selfloop transitions, 38 changer transitions 0/294 dead transitions. [2024-06-21 19:40:06,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 294 transitions, 4081 flow [2024-06-21 19:40:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:40:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:40:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 19:40:06,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-21 19:40:06,046 INFO L175 Difference]: Start difference. First operand has 213 places, 264 transitions, 3459 flow. Second operand 11 states and 178 transitions. [2024-06-21 19:40:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 294 transitions, 4081 flow [2024-06-21 19:40:06,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 294 transitions, 3996 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:40:06,214 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3454 flow [2024-06-21 19:40:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3454, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-21 19:40:06,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 19:40:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3454 flow [2024-06-21 19:40:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:06,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:40:06,216 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:06,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash -14717505, now seen corresponding path program 1 times [2024-06-21 19:40:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:06,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066428333] [2024-06-21 19:40:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066428333] [2024-06-21 19:40:09,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066428333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:09,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:09,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022990270] [2024-06-21 19:40:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:09,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:09,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:09,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3454 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:09,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:09,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:09,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:11,028 INFO L124 PetriNetUnfolderBase]: 1744/2886 cut-off events. [2024-06-21 19:40:11,028 INFO L125 PetriNetUnfolderBase]: For 88466/88466 co-relation queries the response was YES. [2024-06-21 19:40:11,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18990 conditions, 2886 events. 1744/2886 cut-off events. For 88466/88466 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16731 event pairs, 758 based on Foata normal form. 2/2879 useless extension candidates. Maximal degree in co-relation 18896. Up to 2481 conditions per place. [2024-06-21 19:40:11,052 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 44 changer transitions 0/305 dead transitions. [2024-06-21 19:40:11,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 305 transitions, 4465 flow [2024-06-21 19:40:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:40:11,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 19:40:11,054 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3454 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:40:11,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 305 transitions, 4465 flow [2024-06-21 19:40:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 305 transitions, 4392 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:40:11,214 INFO L231 Difference]: Finished difference. Result has 217 places, 269 transitions, 3570 flow [2024-06-21 19:40:11,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3570, PETRI_PLACES=217, PETRI_TRANSITIONS=269} [2024-06-21 19:40:11,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 19:40:11,215 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 269 transitions, 3570 flow [2024-06-21 19:40:11,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:11,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:11,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:11,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:40:11,215 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:11,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2088901539, now seen corresponding path program 2 times [2024-06-21 19:40:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632383274] [2024-06-21 19:40:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632383274] [2024-06-21 19:40:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632383274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:14,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:14,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987758257] [2024-06-21 19:40:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:14,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:14,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 269 transitions, 3570 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:14,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:14,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:14,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:15,959 INFO L124 PetriNetUnfolderBase]: 1752/2913 cut-off events. [2024-06-21 19:40:15,959 INFO L125 PetriNetUnfolderBase]: For 91933/91933 co-relation queries the response was YES. [2024-06-21 19:40:15,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19331 conditions, 2913 events. 1752/2913 cut-off events. For 91933/91933 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17041 event pairs, 794 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 19234. Up to 2622 conditions per place. [2024-06-21 19:40:15,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-21 19:40:15,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 298 transitions, 4415 flow [2024-06-21 19:40:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:40:15,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:40:15,986 INFO L175 Difference]: Start difference. First operand has 217 places, 269 transitions, 3570 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:40:15,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 298 transitions, 4415 flow [2024-06-21 19:40:16,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 298 transitions, 4321 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:16,192 INFO L231 Difference]: Finished difference. Result has 222 places, 272 transitions, 3613 flow [2024-06-21 19:40:16,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3613, PETRI_PLACES=222, PETRI_TRANSITIONS=272} [2024-06-21 19:40:16,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 19:40:16,194 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 272 transitions, 3613 flow [2024-06-21 19:40:16,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:16,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:16,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:40:16,194 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:16,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2089049409, now seen corresponding path program 3 times [2024-06-21 19:40:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300195546] [2024-06-21 19:40:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:19,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300195546] [2024-06-21 19:40:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300195546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:19,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772477655] [2024-06-21 19:40:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:19,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 272 transitions, 3613 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:19,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:19,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:21,152 INFO L124 PetriNetUnfolderBase]: 1747/2906 cut-off events. [2024-06-21 19:40:21,152 INFO L125 PetriNetUnfolderBase]: For 94050/94050 co-relation queries the response was YES. [2024-06-21 19:40:21,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19265 conditions, 2906 events. 1747/2906 cut-off events. For 94050/94050 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16996 event pairs, 793 based on Foata normal form. 2/2899 useless extension candidates. Maximal degree in co-relation 19166. Up to 2692 conditions per place. [2024-06-21 19:40:21,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 38 changer transitions 0/294 dead transitions. [2024-06-21 19:40:21,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 294 transitions, 4303 flow [2024-06-21 19:40:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:40:21,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-21 19:40:21,188 INFO L175 Difference]: Start difference. First operand has 222 places, 272 transitions, 3613 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:40:21,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 294 transitions, 4303 flow [2024-06-21 19:40:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 294 transitions, 4199 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:40:21,387 INFO L231 Difference]: Finished difference. Result has 225 places, 274 transitions, 3633 flow [2024-06-21 19:40:21,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3633, PETRI_PLACES=225, PETRI_TRANSITIONS=274} [2024-06-21 19:40:21,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 19:40:21,388 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 274 transitions, 3633 flow [2024-06-21 19:40:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:21,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:21,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:21,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:40:21,388 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:21,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2089055361, now seen corresponding path program 1 times [2024-06-21 19:40:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671196121] [2024-06-21 19:40:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671196121] [2024-06-21 19:40:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671196121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:25,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:25,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957356748] [2024-06-21 19:40:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:25,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:25,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:25,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:25,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 274 transitions, 3633 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:25,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:25,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:25,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:27,225 INFO L124 PetriNetUnfolderBase]: 1762/2929 cut-off events. [2024-06-21 19:40:27,225 INFO L125 PetriNetUnfolderBase]: For 100571/100571 co-relation queries the response was YES. [2024-06-21 19:40:27,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19344 conditions, 2929 events. 1762/2929 cut-off events. For 100571/100571 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17080 event pairs, 799 based on Foata normal form. 8/2928 useless extension candidates. Maximal degree in co-relation 19244. Up to 2681 conditions per place. [2024-06-21 19:40:27,251 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 37 changer transitions 0/298 dead transitions. [2024-06-21 19:40:27,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 298 transitions, 4348 flow [2024-06-21 19:40:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:40:27,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 19:40:27,252 INFO L175 Difference]: Start difference. First operand has 225 places, 274 transitions, 3633 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:40:27,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 298 transitions, 4348 flow [2024-06-21 19:40:27,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 298 transitions, 4249 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:40:27,507 INFO L231 Difference]: Finished difference. Result has 226 places, 275 transitions, 3633 flow [2024-06-21 19:40:27,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3633, PETRI_PLACES=226, PETRI_TRANSITIONS=275} [2024-06-21 19:40:27,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 19:40:27,507 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 275 transitions, 3633 flow [2024-06-21 19:40:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:27,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:27,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:27,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:40:27,508 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:27,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1870379808, now seen corresponding path program 1 times [2024-06-21 19:40:27,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:27,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702754796] [2024-06-21 19:40:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:27,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702754796] [2024-06-21 19:40:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702754796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:32,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392612061] [2024-06-21 19:40:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:32,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:32,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 275 transitions, 3633 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:32,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:32,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:32,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:33,668 INFO L124 PetriNetUnfolderBase]: 1770/2950 cut-off events. [2024-06-21 19:40:33,668 INFO L125 PetriNetUnfolderBase]: For 97474/97479 co-relation queries the response was YES. [2024-06-21 19:40:33,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19512 conditions, 2950 events. 1770/2950 cut-off events. For 97474/97479 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17036 event pairs, 473 based on Foata normal form. 7/2957 useless extension candidates. Maximal degree in co-relation 19411. Up to 2523 conditions per place. [2024-06-21 19:40:33,696 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 56 changer transitions 0/308 dead transitions. [2024-06-21 19:40:33,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 308 transitions, 4551 flow [2024-06-21 19:40:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:40:33,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 19:40:33,697 INFO L175 Difference]: Start difference. First operand has 226 places, 275 transitions, 3633 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:40:33,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 308 transitions, 4551 flow [2024-06-21 19:40:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 308 transitions, 4482 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:33,936 INFO L231 Difference]: Finished difference. Result has 230 places, 279 transitions, 3753 flow [2024-06-21 19:40:33,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3753, PETRI_PLACES=230, PETRI_TRANSITIONS=279} [2024-06-21 19:40:33,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 19:40:33,937 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 279 transitions, 3753 flow [2024-06-21 19:40:33,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:33,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:33,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:33,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:40:33,938 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:33,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash -456254332, now seen corresponding path program 2 times [2024-06-21 19:40:33,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:33,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035135167] [2024-06-21 19:40:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:38,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035135167] [2024-06-21 19:40:38,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035135167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:38,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745019252] [2024-06-21 19:40:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:38,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:38,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:38,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 279 transitions, 3753 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:38,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:38,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:38,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:39,457 INFO L124 PetriNetUnfolderBase]: 1778/2962 cut-off events. [2024-06-21 19:40:39,457 INFO L125 PetriNetUnfolderBase]: For 101564/101569 co-relation queries the response was YES. [2024-06-21 19:40:39,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19848 conditions, 2962 events. 1778/2962 cut-off events. For 101564/101569 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17127 event pairs, 469 based on Foata normal form. 7/2969 useless extension candidates. Maximal degree in co-relation 19746. Up to 2582 conditions per place. [2024-06-21 19:40:39,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 55 changer transitions 0/305 dead transitions. [2024-06-21 19:40:39,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 305 transitions, 4537 flow [2024-06-21 19:40:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:40:39,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:40:39,484 INFO L175 Difference]: Start difference. First operand has 230 places, 279 transitions, 3753 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:40:39,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 305 transitions, 4537 flow [2024-06-21 19:40:39,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 305 transitions, 4408 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:39,690 INFO L231 Difference]: Finished difference. Result has 234 places, 281 transitions, 3781 flow [2024-06-21 19:40:39,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3781, PETRI_PLACES=234, PETRI_TRANSITIONS=281} [2024-06-21 19:40:39,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-21 19:40:39,691 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 281 transitions, 3781 flow [2024-06-21 19:40:39,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:39,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:39,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:39,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:40:39,691 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:39,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 331426592, now seen corresponding path program 3 times [2024-06-21 19:40:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:39,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323150145] [2024-06-21 19:40:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:39,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:44,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323150145] [2024-06-21 19:40:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323150145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:44,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:44,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947803902] [2024-06-21 19:40:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:44,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:44,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:44,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 281 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:44,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:45,327 INFO L124 PetriNetUnfolderBase]: 1786/2975 cut-off events. [2024-06-21 19:40:45,328 INFO L125 PetriNetUnfolderBase]: For 104538/104543 co-relation queries the response was YES. [2024-06-21 19:40:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20041 conditions, 2975 events. 1786/2975 cut-off events. For 104538/104543 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17283 event pairs, 560 based on Foata normal form. 7/2982 useless extension candidates. Maximal degree in co-relation 19937. Up to 2701 conditions per place. [2024-06-21 19:40:45,356 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 44 changer transitions 0/301 dead transitions. [2024-06-21 19:40:45,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 301 transitions, 4441 flow [2024-06-21 19:40:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:40:45,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-21 19:40:45,357 INFO L175 Difference]: Start difference. First operand has 234 places, 281 transitions, 3781 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:40:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 301 transitions, 4441 flow [2024-06-21 19:40:45,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 301 transitions, 4320 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:40:45,624 INFO L231 Difference]: Finished difference. Result has 236 places, 283 transitions, 3783 flow [2024-06-21 19:40:45,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3783, PETRI_PLACES=236, PETRI_TRANSITIONS=283} [2024-06-21 19:40:45,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 19:40:45,625 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 283 transitions, 3783 flow [2024-06-21 19:40:45,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:45,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:45,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:45,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:40:45,625 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:45,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash 804630500, now seen corresponding path program 2 times [2024-06-21 19:40:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:45,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515677004] [2024-06-21 19:40:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515677004] [2024-06-21 19:40:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515677004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:51,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:51,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665155210] [2024-06-21 19:40:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:51,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:51,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:51,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 283 transitions, 3783 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:51,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:51,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:51,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:53,531 INFO L124 PetriNetUnfolderBase]: 1783/2971 cut-off events. [2024-06-21 19:40:53,531 INFO L125 PetriNetUnfolderBase]: For 105377/105382 co-relation queries the response was YES. [2024-06-21 19:40:53,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19950 conditions, 2971 events. 1783/2971 cut-off events. For 105377/105382 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17269 event pairs, 562 based on Foata normal form. 6/2977 useless extension candidates. Maximal degree in co-relation 19845. Up to 2701 conditions per place. [2024-06-21 19:40:53,556 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 54 changer transitions 0/305 dead transitions. [2024-06-21 19:40:53,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 305 transitions, 4529 flow [2024-06-21 19:40:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 19:40:53,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 19:40:53,558 INFO L175 Difference]: Start difference. First operand has 236 places, 283 transitions, 3783 flow. Second operand 9 states and 148 transitions. [2024-06-21 19:40:53,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 305 transitions, 4529 flow [2024-06-21 19:40:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 305 transitions, 4406 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 19:40:53,843 INFO L231 Difference]: Finished difference. Result has 238 places, 283 transitions, 3776 flow [2024-06-21 19:40:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3776, PETRI_PLACES=238, PETRI_TRANSITIONS=283} [2024-06-21 19:40:53,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-21 19:40:53,844 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 283 transitions, 3776 flow [2024-06-21 19:40:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:53,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:40:53,844 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:53,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2013296668, now seen corresponding path program 3 times [2024-06-21 19:40:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860835004] [2024-06-21 19:40:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:59,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:59,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860835004] [2024-06-21 19:40:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860835004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:59,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309250970] [2024-06-21 19:40:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:59,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:59,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:59,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:40:59,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 283 transitions, 3776 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:59,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:59,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:40:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:00,963 INFO L124 PetriNetUnfolderBase]: 1778/2969 cut-off events. [2024-06-21 19:41:00,963 INFO L125 PetriNetUnfolderBase]: For 107725/107730 co-relation queries the response was YES. [2024-06-21 19:41:00,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19913 conditions, 2969 events. 1778/2969 cut-off events. For 107725/107730 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17302 event pairs, 564 based on Foata normal form. 6/2975 useless extension candidates. Maximal degree in co-relation 19807. Up to 2708 conditions per place. [2024-06-21 19:41:00,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 44 changer transitions 0/299 dead transitions. [2024-06-21 19:41:00,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 4402 flow [2024-06-21 19:41:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:41:00,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-21 19:41:00,991 INFO L175 Difference]: Start difference. First operand has 238 places, 283 transitions, 3776 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:41:00,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 4402 flow [2024-06-21 19:41:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 299 transitions, 4274 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:41:01,270 INFO L231 Difference]: Finished difference. Result has 239 places, 283 transitions, 3744 flow [2024-06-21 19:41:01,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3744, PETRI_PLACES=239, PETRI_TRANSITIONS=283} [2024-06-21 19:41:01,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 19:41:01,270 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 283 transitions, 3744 flow [2024-06-21 19:41:01,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:01,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:01,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:41:01,271 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:01,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash 335777070, now seen corresponding path program 1 times [2024-06-21 19:41:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:01,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67707454] [2024-06-21 19:41:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67707454] [2024-06-21 19:41:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67707454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:05,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:05,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134579299] [2024-06-21 19:41:05,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:05,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:05,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 283 transitions, 3744 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:05,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:05,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:07,197 INFO L124 PetriNetUnfolderBase]: 1788/2973 cut-off events. [2024-06-21 19:41:07,197 INFO L125 PetriNetUnfolderBase]: For 111081/111081 co-relation queries the response was YES. [2024-06-21 19:41:07,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20075 conditions, 2973 events. 1788/2973 cut-off events. For 111081/111081 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17134 event pairs, 441 based on Foata normal form. 2/2975 useless extension candidates. Maximal degree in co-relation 19968. Up to 2401 conditions per place. [2024-06-21 19:41:07,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 154 changer transitions 0/328 dead transitions. [2024-06-21 19:41:07,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 328 transitions, 4780 flow [2024-06-21 19:41:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:41:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:41:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-21 19:41:07,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337711069418386 [2024-06-21 19:41:07,230 INFO L175 Difference]: Start difference. First operand has 239 places, 283 transitions, 3744 flow. Second operand 13 states and 215 transitions. [2024-06-21 19:41:07,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 328 transitions, 4780 flow [2024-06-21 19:41:07,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 328 transitions, 4674 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 19:41:07,493 INFO L231 Difference]: Finished difference. Result has 243 places, 289 transitions, 4073 flow [2024-06-21 19:41:07,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4073, PETRI_PLACES=243, PETRI_TRANSITIONS=289} [2024-06-21 19:41:07,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 19:41:07,494 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 289 transitions, 4073 flow [2024-06-21 19:41:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:07,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:07,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:41:07,494 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:07,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1885547326, now seen corresponding path program 4 times [2024-06-21 19:41:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301539437] [2024-06-21 19:41:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:12,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:12,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301539437] [2024-06-21 19:41:12,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301539437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:12,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:12,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:12,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688319926] [2024-06-21 19:41:12,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:12,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:12,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:12,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 289 transitions, 4073 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:12,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:12,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:13,604 INFO L124 PetriNetUnfolderBase]: 1783/2970 cut-off events. [2024-06-21 19:41:13,604 INFO L125 PetriNetUnfolderBase]: For 115404/115408 co-relation queries the response was YES. [2024-06-21 19:41:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20637 conditions, 2970 events. 1783/2970 cut-off events. For 115404/115408 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17088 event pairs, 434 based on Foata normal form. 3/2971 useless extension candidates. Maximal degree in co-relation 20530. Up to 2734 conditions per place. [2024-06-21 19:41:13,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 28 changer transitions 0/303 dead transitions. [2024-06-21 19:41:13,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 303 transitions, 4713 flow [2024-06-21 19:41:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 19:41:13,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-21 19:41:13,631 INFO L175 Difference]: Start difference. First operand has 243 places, 289 transitions, 4073 flow. Second operand 9 states and 132 transitions. [2024-06-21 19:41:13,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 303 transitions, 4713 flow [2024-06-21 19:41:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 303 transitions, 4545 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 19:41:13,933 INFO L231 Difference]: Finished difference. Result has 244 places, 290 transitions, 3982 flow [2024-06-21 19:41:13,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3982, PETRI_PLACES=244, PETRI_TRANSITIONS=290} [2024-06-21 19:41:13,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 19:41:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 290 transitions, 3982 flow [2024-06-21 19:41:13,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:13,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:13,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:41:13,934 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:13,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash -277490912, now seen corresponding path program 5 times [2024-06-21 19:41:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053386822] [2024-06-21 19:41:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:18,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:18,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053386822] [2024-06-21 19:41:18,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053386822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:18,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:18,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:18,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372379707] [2024-06-21 19:41:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:18,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:18,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:18,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:18,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 290 transitions, 3982 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:18,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:18,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:18,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:19,579 INFO L124 PetriNetUnfolderBase]: 1778/2961 cut-off events. [2024-06-21 19:41:19,579 INFO L125 PetriNetUnfolderBase]: For 115375/115379 co-relation queries the response was YES. [2024-06-21 19:41:19,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20440 conditions, 2961 events. 1778/2961 cut-off events. For 115375/115379 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17013 event pairs, 433 based on Foata normal form. 3/2962 useless extension candidates. Maximal degree in co-relation 20332. Up to 2716 conditions per place. [2024-06-21 19:41:19,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 28 changer transitions 0/304 dead transitions. [2024-06-21 19:41:19,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 304 transitions, 4612 flow [2024-06-21 19:41:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 19:41:19,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-21 19:41:19,610 INFO L175 Difference]: Start difference. First operand has 244 places, 290 transitions, 3982 flow. Second operand 9 states and 133 transitions. [2024-06-21 19:41:19,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 304 transitions, 4612 flow [2024-06-21 19:41:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 304 transitions, 4544 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:19,912 INFO L231 Difference]: Finished difference. Result has 247 places, 290 transitions, 3975 flow [2024-06-21 19:41:19,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3975, PETRI_PLACES=247, PETRI_TRANSITIONS=290} [2024-06-21 19:41:19,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 19:41:19,912 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 290 transitions, 3975 flow [2024-06-21 19:41:19,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:19,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:19,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:19,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:41:19,913 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:19,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:19,913 INFO L85 PathProgramCache]: Analyzing trace with hash -285115114, now seen corresponding path program 2 times [2024-06-21 19:41:19,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030870141] [2024-06-21 19:41:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030870141] [2024-06-21 19:41:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030870141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:25,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:25,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:25,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562748803] [2024-06-21 19:41:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:25,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:25,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:25,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:25,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 290 transitions, 3975 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:25,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:25,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:25,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:26,675 INFO L124 PetriNetUnfolderBase]: 1783/2972 cut-off events. [2024-06-21 19:41:26,675 INFO L125 PetriNetUnfolderBase]: For 117951/117955 co-relation queries the response was YES. [2024-06-21 19:41:26,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20539 conditions, 2972 events. 1783/2972 cut-off events. For 117951/117955 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17134 event pairs, 432 based on Foata normal form. 2/2972 useless extension candidates. Maximal degree in co-relation 20430. Up to 2710 conditions per place. [2024-06-21 19:41:26,704 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 263 selfloop transitions, 41 changer transitions 0/309 dead transitions. [2024-06-21 19:41:26,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 309 transitions, 4901 flow [2024-06-21 19:41:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:41:26,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 19:41:26,705 INFO L175 Difference]: Start difference. First operand has 247 places, 290 transitions, 3975 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:41:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 309 transitions, 4901 flow [2024-06-21 19:41:26,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 309 transitions, 4823 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:41:26,990 INFO L231 Difference]: Finished difference. Result has 249 places, 293 transitions, 4041 flow [2024-06-21 19:41:26,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4041, PETRI_PLACES=249, PETRI_TRANSITIONS=293} [2024-06-21 19:41:26,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 19:41:26,991 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 293 transitions, 4041 flow [2024-06-21 19:41:26,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:26,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:26,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:41:26,991 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:26,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1610663842, now seen corresponding path program 4 times [2024-06-21 19:41:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:26,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678679789] [2024-06-21 19:41:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:26,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678679789] [2024-06-21 19:41:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678679789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522072219] [2024-06-21 19:41:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:31,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:31,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 293 transitions, 4041 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:31,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:31,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:33,919 INFO L124 PetriNetUnfolderBase]: 1795/2987 cut-off events. [2024-06-21 19:41:33,919 INFO L125 PetriNetUnfolderBase]: For 119909/119909 co-relation queries the response was YES. [2024-06-21 19:41:33,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20684 conditions, 2987 events. 1795/2987 cut-off events. For 119909/119909 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17234 event pairs, 431 based on Foata normal form. 1/2986 useless extension candidates. Maximal degree in co-relation 20574. Up to 2643 conditions per place. [2024-06-21 19:41:33,948 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2024-06-21 19:41:33,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 330 transitions, 4985 flow [2024-06-21 19:41:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:41:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:41:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 216 transitions. [2024-06-21 19:41:33,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-21 19:41:33,950 INFO L175 Difference]: Start difference. First operand has 249 places, 293 transitions, 4041 flow. Second operand 14 states and 216 transitions. [2024-06-21 19:41:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 330 transitions, 4985 flow [2024-06-21 19:41:34,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 330 transitions, 4865 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:34,291 INFO L231 Difference]: Finished difference. Result has 257 places, 302 transitions, 4266 flow [2024-06-21 19:41:34,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4266, PETRI_PLACES=257, PETRI_TRANSITIONS=302} [2024-06-21 19:41:34,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 19:41:34,292 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 302 transitions, 4266 flow [2024-06-21 19:41:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:34,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:34,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:41:34,292 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:34,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -284758924, now seen corresponding path program 3 times [2024-06-21 19:41:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:34,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161076317] [2024-06-21 19:41:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:39,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:39,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161076317] [2024-06-21 19:41:39,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161076317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:39,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:39,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805427077] [2024-06-21 19:41:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:39,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:39,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 302 transitions, 4266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:39,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:39,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:39,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:41,463 INFO L124 PetriNetUnfolderBase]: 1810/3014 cut-off events. [2024-06-21 19:41:41,463 INFO L125 PetriNetUnfolderBase]: For 125816/125816 co-relation queries the response was YES. [2024-06-21 19:41:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21097 conditions, 3014 events. 1810/3014 cut-off events. For 125816/125816 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17472 event pairs, 429 based on Foata normal form. 2/3014 useless extension candidates. Maximal degree in co-relation 20986. Up to 2589 conditions per place. [2024-06-21 19:41:41,491 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 220 selfloop transitions, 116 changer transitions 0/341 dead transitions. [2024-06-21 19:41:41,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 341 transitions, 5439 flow [2024-06-21 19:41:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:41:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:41:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-21 19:41:41,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771106941838649 [2024-06-21 19:41:41,493 INFO L175 Difference]: Start difference. First operand has 257 places, 302 transitions, 4266 flow. Second operand 13 states and 201 transitions. [2024-06-21 19:41:41,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 341 transitions, 5439 flow [2024-06-21 19:41:41,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 341 transitions, 5230 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-21 19:41:41,830 INFO L231 Difference]: Finished difference. Result has 261 places, 314 transitions, 4535 flow [2024-06-21 19:41:41,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4535, PETRI_PLACES=261, PETRI_TRANSITIONS=314} [2024-06-21 19:41:41,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 19:41:41,831 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 314 transitions, 4535 flow [2024-06-21 19:41:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:41,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:41,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:41:41,831 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:41,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1601131052, now seen corresponding path program 4 times [2024-06-21 19:41:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867060266] [2024-06-21 19:41:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:46,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867060266] [2024-06-21 19:41:46,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867060266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:46,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:46,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:46,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889988429] [2024-06-21 19:41:46,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:46,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:46,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:46,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 314 transitions, 4535 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:46,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:46,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:46,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:48,027 INFO L124 PetriNetUnfolderBase]: 1833/3058 cut-off events. [2024-06-21 19:41:48,027 INFO L125 PetriNetUnfolderBase]: For 133772/133772 co-relation queries the response was YES. [2024-06-21 19:41:48,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21673 conditions, 3058 events. 1833/3058 cut-off events. For 133772/133772 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17824 event pairs, 429 based on Foata normal form. 2/3058 useless extension candidates. Maximal degree in co-relation 21560. Up to 2614 conditions per place. [2024-06-21 19:41:48,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 123 changer transitions 0/352 dead transitions. [2024-06-21 19:41:48,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 5724 flow [2024-06-21 19:41:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:41:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:41:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 213 transitions. [2024-06-21 19:41:48,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710801393728223 [2024-06-21 19:41:48,057 INFO L175 Difference]: Start difference. First operand has 261 places, 314 transitions, 4535 flow. Second operand 14 states and 213 transitions. [2024-06-21 19:41:48,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 5724 flow [2024-06-21 19:41:48,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 352 transitions, 5465 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:48,460 INFO L231 Difference]: Finished difference. Result has 269 places, 323 transitions, 4687 flow [2024-06-21 19:41:48,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4687, PETRI_PLACES=269, PETRI_TRANSITIONS=323} [2024-06-21 19:41:48,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 19:41:48,461 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 323 transitions, 4687 flow [2024-06-21 19:41:48,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:48,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:48,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:41:48,461 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:48,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1349568266, now seen corresponding path program 5 times [2024-06-21 19:41:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909147612] [2024-06-21 19:41:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:53,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:53,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909147612] [2024-06-21 19:41:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909147612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:53,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000554501] [2024-06-21 19:41:53,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:53,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:41:53,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 323 transitions, 4687 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:53,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:53,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:41:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:55,038 INFO L124 PetriNetUnfolderBase]: 1830/3054 cut-off events. [2024-06-21 19:41:55,038 INFO L125 PetriNetUnfolderBase]: For 134788/134792 co-relation queries the response was YES. [2024-06-21 19:41:55,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21563 conditions, 3054 events. 1830/3054 cut-off events. For 134788/134792 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17669 event pairs, 433 based on Foata normal form. 2/3054 useless extension candidates. Maximal degree in co-relation 21449. Up to 2778 conditions per place. [2024-06-21 19:41:55,068 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 289 selfloop transitions, 44 changer transitions 0/338 dead transitions. [2024-06-21 19:41:55,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 338 transitions, 5522 flow [2024-06-21 19:41:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:41:55,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 19:41:55,069 INFO L175 Difference]: Start difference. First operand has 269 places, 323 transitions, 4687 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:41:55,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 338 transitions, 5522 flow [2024-06-21 19:41:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 338 transitions, 5283 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 19:41:55,441 INFO L231 Difference]: Finished difference. Result has 268 places, 324 transitions, 4569 flow [2024-06-21 19:41:55,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4569, PETRI_PLACES=268, PETRI_TRANSITIONS=324} [2024-06-21 19:41:55,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 19:41:55,442 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 324 transitions, 4569 flow [2024-06-21 19:41:55,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:55,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:55,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:55,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:41:55,442 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:55,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash 483330178, now seen corresponding path program 5 times [2024-06-21 19:41:55,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:55,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659030100] [2024-06-21 19:41:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:55,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659030100] [2024-06-21 19:42:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659030100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281479261] [2024-06-21 19:42:01,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:01,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 324 transitions, 4569 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:01,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:01,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:01,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:02,672 INFO L124 PetriNetUnfolderBase]: 1827/3052 cut-off events. [2024-06-21 19:42:02,672 INFO L125 PetriNetUnfolderBase]: For 135888/135892 co-relation queries the response was YES. [2024-06-21 19:42:02,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21275 conditions, 3052 events. 1827/3052 cut-off events. For 135888/135892 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17737 event pairs, 431 based on Foata normal form. 2/3052 useless extension candidates. Maximal degree in co-relation 21160. Up to 2796 conditions per place. [2024-06-21 19:42:02,704 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 300 selfloop transitions, 31 changer transitions 0/336 dead transitions. [2024-06-21 19:42:02,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 336 transitions, 5259 flow [2024-06-21 19:42:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 19:42:02,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-21 19:42:02,705 INFO L175 Difference]: Start difference. First operand has 268 places, 324 transitions, 4569 flow. Second operand 9 states and 133 transitions. [2024-06-21 19:42:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 336 transitions, 5259 flow [2024-06-21 19:42:03,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 336 transitions, 5157 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:03,059 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 4537 flow [2024-06-21 19:42:03,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4537, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-21 19:42:03,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 19:42:03,060 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 4537 flow [2024-06-21 19:42:03,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:03,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:03,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:42:03,060 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:03,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1849624766, now seen corresponding path program 6 times [2024-06-21 19:42:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:03,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84178113] [2024-06-21 19:42:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84178113] [2024-06-21 19:42:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84178113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54640427] [2024-06-21 19:42:07,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:08,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 4537 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:10,529 INFO L124 PetriNetUnfolderBase]: 1836/3067 cut-off events. [2024-06-21 19:42:10,529 INFO L125 PetriNetUnfolderBase]: For 139924/139924 co-relation queries the response was YES. [2024-06-21 19:42:10,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21244 conditions, 3067 events. 1836/3067 cut-off events. For 139924/139924 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17906 event pairs, 430 based on Foata normal form. 3/3070 useless extension candidates. Maximal degree in co-relation 21128. Up to 2551 conditions per place. [2024-06-21 19:42:10,557 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 161 changer transitions 0/372 dead transitions. [2024-06-21 19:42:10,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 372 transitions, 5686 flow [2024-06-21 19:42:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 19:42:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 19:42:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 253 transitions. [2024-06-21 19:42:10,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856707317073171 [2024-06-21 19:42:10,559 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 4537 flow. Second operand 16 states and 253 transitions. [2024-06-21 19:42:10,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 372 transitions, 5686 flow [2024-06-21 19:42:10,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 372 transitions, 5594 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 19:42:10,965 INFO L231 Difference]: Finished difference. Result has 280 places, 338 transitions, 4996 flow [2024-06-21 19:42:10,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4996, PETRI_PLACES=280, PETRI_TRANSITIONS=338} [2024-06-21 19:42:10,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 19:42:10,966 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 338 transitions, 4996 flow [2024-06-21 19:42:10,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:10,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:10,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:10,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:42:10,966 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:10,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash -456241436, now seen corresponding path program 1 times [2024-06-21 19:42:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:10,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109223763] [2024-06-21 19:42:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:10,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109223763] [2024-06-21 19:42:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109223763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:15,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:15,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799080849] [2024-06-21 19:42:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:15,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:15,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:15,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 338 transitions, 4996 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:15,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:15,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:15,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:16,606 INFO L124 PetriNetUnfolderBase]: 1823/3021 cut-off events. [2024-06-21 19:42:16,606 INFO L125 PetriNetUnfolderBase]: For 146742/146742 co-relation queries the response was YES. [2024-06-21 19:42:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21297 conditions, 3021 events. 1823/3021 cut-off events. For 146742/146742 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17688 event pairs, 753 based on Foata normal form. 6/3018 useless extension candidates. Maximal degree in co-relation 21180. Up to 2594 conditions per place. [2024-06-21 19:42:16,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 46 changer transitions 0/372 dead transitions. [2024-06-21 19:42:16,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 372 transitions, 6057 flow [2024-06-21 19:42:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:42:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:42:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:42:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 19:42:16,637 INFO L175 Difference]: Start difference. First operand has 280 places, 338 transitions, 4996 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:42:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 372 transitions, 6057 flow [2024-06-21 19:42:16,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 372 transitions, 5874 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 19:42:16,975 INFO L231 Difference]: Finished difference. Result has 280 places, 338 transitions, 4912 flow [2024-06-21 19:42:16,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=280, PETRI_TRANSITIONS=338} [2024-06-21 19:42:16,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 19:42:16,976 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 338 transitions, 4912 flow [2024-06-21 19:42:16,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:16,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:16,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:16,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:42:16,977 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:16,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2005670172, now seen corresponding path program 2 times [2024-06-21 19:42:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:16,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310846265] [2024-06-21 19:42:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:21,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310846265] [2024-06-21 19:42:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310846265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:21,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:21,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:21,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009302779] [2024-06-21 19:42:21,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:21,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:21,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:21,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:21,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 338 transitions, 4912 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:21,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:21,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:21,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:22,380 INFO L124 PetriNetUnfolderBase]: 1810/3019 cut-off events. [2024-06-21 19:42:22,380 INFO L125 PetriNetUnfolderBase]: For 138586/138586 co-relation queries the response was YES. [2024-06-21 19:42:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3019 events. 1810/3019 cut-off events. For 138586/138586 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17888 event pairs, 778 based on Foata normal form. 6/3016 useless extension candidates. Maximal degree in co-relation 20766. Up to 2712 conditions per place. [2024-06-21 19:42:22,409 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 40 changer transitions 0/364 dead transitions. [2024-06-21 19:42:22,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 364 transitions, 5786 flow [2024-06-21 19:42:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:42:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:42:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:42:22,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 19:42:22,411 INFO L175 Difference]: Start difference. First operand has 280 places, 338 transitions, 4912 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:42:22,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 364 transitions, 5786 flow [2024-06-21 19:42:22,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 364 transitions, 5696 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:22,791 INFO L231 Difference]: Finished difference. Result has 283 places, 338 transitions, 4907 flow [2024-06-21 19:42:22,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4907, PETRI_PLACES=283, PETRI_TRANSITIONS=338} [2024-06-21 19:42:22,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-21 19:42:22,792 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 338 transitions, 4907 flow [2024-06-21 19:42:22,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:22,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:22,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:42:22,792 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:22,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2092539037, now seen corresponding path program 1 times [2024-06-21 19:42:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:22,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8184669] [2024-06-21 19:42:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8184669] [2024-06-21 19:42:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8184669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590416323] [2024-06-21 19:42:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:25,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 19:42:25,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 338 transitions, 4907 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:25,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:25,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 19:42:25,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:27,818 INFO L124 PetriNetUnfolderBase]: 2197/3869 cut-off events. [2024-06-21 19:42:27,818 INFO L125 PetriNetUnfolderBase]: For 325555/325714 co-relation queries the response was YES. [2024-06-21 19:42:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28926 conditions, 3869 events. 2197/3869 cut-off events. For 325555/325714 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25621 event pairs, 371 based on Foata normal form. 92/3883 useless extension candidates. Maximal degree in co-relation 28805. Up to 1281 conditions per place. [2024-06-21 19:42:27,862 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 87 changer transitions 11/418 dead transitions. [2024-06-21 19:42:27,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 418 transitions, 6392 flow [2024-06-21 19:42:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 19:42:27,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 19:42:27,863 INFO L175 Difference]: Start difference. First operand has 283 places, 338 transitions, 4907 flow. Second operand 9 states and 170 transitions. [2024-06-21 19:42:27,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 418 transitions, 6392 flow [2024-06-21 19:42:28,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 418 transitions, 6292 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:28,312 INFO L231 Difference]: Finished difference. Result has 289 places, 367 transitions, 5523 flow [2024-06-21 19:42:28,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5523, PETRI_PLACES=289, PETRI_TRANSITIONS=367} [2024-06-21 19:42:28,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 19:42:28,313 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 367 transitions, 5523 flow [2024-06-21 19:42:28,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:28,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:28,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:42:28,313 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:28,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -732109515, now seen corresponding path program 2 times [2024-06-21 19:42:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230391725] [2024-06-21 19:42:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230391725] [2024-06-21 19:42:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230391725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877242044] [2024-06-21 19:42:31,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:31,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 19:42:31,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 367 transitions, 5523 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:31,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:31,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 19:42:31,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:33,143 INFO L124 PetriNetUnfolderBase]: 1907/3439 cut-off events. [2024-06-21 19:42:33,143 INFO L125 PetriNetUnfolderBase]: For 235769/235802 co-relation queries the response was YES. [2024-06-21 19:42:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23706 conditions, 3439 events. 1907/3439 cut-off events. For 235769/235802 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23066 event pairs, 314 based on Foata normal form. 78/3449 useless extension candidates. Maximal degree in co-relation 23582. Up to 1271 conditions per place. [2024-06-21 19:42:33,178 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 83 changer transitions 34/392 dead transitions. [2024-06-21 19:42:33,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 392 transitions, 6129 flow [2024-06-21 19:42:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:42:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:42:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:42:33,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 19:42:33,179 INFO L175 Difference]: Start difference. First operand has 289 places, 367 transitions, 5523 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:42:33,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 392 transitions, 6129 flow [2024-06-21 19:42:33,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 392 transitions, 6093 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:42:33,667 INFO L231 Difference]: Finished difference. Result has 293 places, 338 transitions, 5227 flow [2024-06-21 19:42:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5227, PETRI_PLACES=293, PETRI_TRANSITIONS=338} [2024-06-21 19:42:33,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 19:42:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 338 transitions, 5227 flow [2024-06-21 19:42:33,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:33,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:33,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:42:33,669 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:33,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1483623721, now seen corresponding path program 3 times [2024-06-21 19:42:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848000615] [2024-06-21 19:42:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:37,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848000615] [2024-06-21 19:42:37,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848000615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:37,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:37,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:37,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204231096] [2024-06-21 19:42:37,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:37,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:37,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:37,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 338 transitions, 5227 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:37,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:37,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:39,401 INFO L124 PetriNetUnfolderBase]: 2013/3248 cut-off events. [2024-06-21 19:42:39,401 INFO L125 PetriNetUnfolderBase]: For 296589/296589 co-relation queries the response was YES. [2024-06-21 19:42:39,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27018 conditions, 3248 events. 2013/3248 cut-off events. For 296589/296589 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18245 event pairs, 473 based on Foata normal form. 40/3288 useless extension candidates. Maximal degree in co-relation 26914. Up to 2068 conditions per place. [2024-06-21 19:42:39,434 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 129 changer transitions 16/382 dead transitions. [2024-06-21 19:42:39,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 382 transitions, 6563 flow [2024-06-21 19:42:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:42:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:42:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 19:42:39,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:42:39,435 INFO L175 Difference]: Start difference. First operand has 293 places, 338 transitions, 5227 flow. Second operand 12 states and 192 transitions. [2024-06-21 19:42:39,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 382 transitions, 6563 flow [2024-06-21 19:42:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 382 transitions, 6105 flow, removed 23 selfloop flow, removed 26 redundant places. [2024-06-21 19:42:39,860 INFO L231 Difference]: Finished difference. Result has 272 places, 335 transitions, 5013 flow [2024-06-21 19:42:39,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5013, PETRI_PLACES=272, PETRI_TRANSITIONS=335} [2024-06-21 19:42:39,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 19:42:39,861 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 335 transitions, 5013 flow [2024-06-21 19:42:39,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:39,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:42:39,862 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:39,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash -523806043, now seen corresponding path program 1 times [2024-06-21 19:42:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581211305] [2024-06-21 19:42:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581211305] [2024-06-21 19:42:43,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581211305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:43,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:43,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32649058] [2024-06-21 19:42:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:43,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 335 transitions, 5013 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:43,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:43,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:43,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:45,929 INFO L124 PetriNetUnfolderBase]: 1941/3134 cut-off events. [2024-06-21 19:42:45,929 INFO L125 PetriNetUnfolderBase]: For 274054/274054 co-relation queries the response was YES. [2024-06-21 19:42:45,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25194 conditions, 3134 events. 1941/3134 cut-off events. For 274054/274054 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17555 event pairs, 469 based on Foata normal form. 42/3176 useless extension candidates. Maximal degree in co-relation 25101. Up to 2472 conditions per place. [2024-06-21 19:42:45,957 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 120 changer transitions 26/368 dead transitions. [2024-06-21 19:42:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 6087 flow [2024-06-21 19:42:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:42:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:42:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 194 transitions. [2024-06-21 19:42:45,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36397748592870544 [2024-06-21 19:42:45,959 INFO L175 Difference]: Start difference. First operand has 272 places, 335 transitions, 5013 flow. Second operand 13 states and 194 transitions. [2024-06-21 19:42:45,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 6087 flow [2024-06-21 19:42:46,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 368 transitions, 5789 flow, removed 14 selfloop flow, removed 15 redundant places. [2024-06-21 19:42:46,335 INFO L231 Difference]: Finished difference. Result has 268 places, 325 transitions, 4838 flow [2024-06-21 19:42:46,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4838, PETRI_PLACES=268, PETRI_TRANSITIONS=325} [2024-06-21 19:42:46,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 19:42:46,335 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 325 transitions, 4838 flow [2024-06-21 19:42:46,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:46,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:46,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:46,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:42:46,336 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:46,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -269009293, now seen corresponding path program 2 times [2024-06-21 19:42:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:46,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36961800] [2024-06-21 19:42:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:49,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36961800] [2024-06-21 19:42:49,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36961800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:49,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:49,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:49,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869028393] [2024-06-21 19:42:49,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:49,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:50,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:50,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 325 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:50,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:50,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:50,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:51,807 INFO L124 PetriNetUnfolderBase]: 2104/3415 cut-off events. [2024-06-21 19:42:51,807 INFO L125 PetriNetUnfolderBase]: For 306374/306374 co-relation queries the response was YES. [2024-06-21 19:42:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28791 conditions, 3415 events. 2104/3415 cut-off events. For 306374/306374 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19513 event pairs, 443 based on Foata normal form. 30/3445 useless extension candidates. Maximal degree in co-relation 28701. Up to 1222 conditions per place. [2024-06-21 19:42:51,841 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 225 selfloop transitions, 131 changer transitions 16/377 dead transitions. [2024-06-21 19:42:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 377 transitions, 6356 flow [2024-06-21 19:42:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:42:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:42:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 19:42:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-21 19:42:51,842 INFO L175 Difference]: Start difference. First operand has 268 places, 325 transitions, 4838 flow. Second operand 11 states and 188 transitions. [2024-06-21 19:42:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 377 transitions, 6356 flow [2024-06-21 19:42:52,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 377 transitions, 6108 flow, removed 16 selfloop flow, removed 15 redundant places. [2024-06-21 19:42:52,331 INFO L231 Difference]: Finished difference. Result has 260 places, 322 transitions, 4949 flow [2024-06-21 19:42:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4949, PETRI_PLACES=260, PETRI_TRANSITIONS=322} [2024-06-21 19:42:52,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 19:42:52,332 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 322 transitions, 4949 flow [2024-06-21 19:42:52,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:52,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:52,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:42:52,333 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:52,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1642218419, now seen corresponding path program 3 times [2024-06-21 19:42:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:52,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148427742] [2024-06-21 19:42:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:52,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148427742] [2024-06-21 19:42:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148427742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:56,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522630811] [2024-06-21 19:42:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:56,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:56,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:42:56,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 322 transitions, 4949 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:56,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:56,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:42:56,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:57,809 INFO L124 PetriNetUnfolderBase]: 2148/3507 cut-off events. [2024-06-21 19:42:57,809 INFO L125 PetriNetUnfolderBase]: For 298681/298681 co-relation queries the response was YES. [2024-06-21 19:42:57,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30284 conditions, 3507 events. 2148/3507 cut-off events. For 298681/298681 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20185 event pairs, 545 based on Foata normal form. 30/3537 useless extension candidates. Maximal degree in co-relation 30196. Up to 1383 conditions per place. [2024-06-21 19:42:57,840 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 122 changer transitions 10/368 dead transitions. [2024-06-21 19:42:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 368 transitions, 6411 flow [2024-06-21 19:42:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:42:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:42:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 19:42:57,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-21 19:42:57,841 INFO L175 Difference]: Start difference. First operand has 260 places, 322 transitions, 4949 flow. Second operand 11 states and 182 transitions. [2024-06-21 19:42:57,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 368 transitions, 6411 flow [2024-06-21 19:42:58,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 368 transitions, 6243 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:42:58,269 INFO L231 Difference]: Finished difference. Result has 261 places, 317 transitions, 4982 flow [2024-06-21 19:42:58,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4982, PETRI_PLACES=261, PETRI_TRANSITIONS=317} [2024-06-21 19:42:58,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 19:42:58,270 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 317 transitions, 4982 flow [2024-06-21 19:42:58,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:58,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:58,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:58,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:42:58,270 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:58,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1749535211, now seen corresponding path program 4 times [2024-06-21 19:42:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:58,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61262640] [2024-06-21 19:42:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:58,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61262640] [2024-06-21 19:43:01,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61262640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:01,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137737069] [2024-06-21 19:43:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:02,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 317 transitions, 4982 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:02,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:02,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:04,354 INFO L124 PetriNetUnfolderBase]: 2160/3543 cut-off events. [2024-06-21 19:43:04,354 INFO L125 PetriNetUnfolderBase]: For 309632/309632 co-relation queries the response was YES. [2024-06-21 19:43:04,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30453 conditions, 3543 events. 2160/3543 cut-off events. For 309632/309632 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20856 event pairs, 732 based on Foata normal form. 42/3585 useless extension candidates. Maximal degree in co-relation 30365. Up to 2879 conditions per place. [2024-06-21 19:43:04,389 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 97 changer transitions 30/345 dead transitions. [2024-06-21 19:43:04,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 345 transitions, 5956 flow [2024-06-21 19:43:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:43:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:43:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 193 transitions. [2024-06-21 19:43:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3621013133208255 [2024-06-21 19:43:04,391 INFO L175 Difference]: Start difference. First operand has 261 places, 317 transitions, 4982 flow. Second operand 13 states and 193 transitions. [2024-06-21 19:43:04,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 345 transitions, 5956 flow [2024-06-21 19:43:04,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 345 transitions, 5690 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:43:04,885 INFO L231 Difference]: Finished difference. Result has 265 places, 299 transitions, 4662 flow [2024-06-21 19:43:04,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4716, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4662, PETRI_PLACES=265, PETRI_TRANSITIONS=299} [2024-06-21 19:43:04,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 19:43:04,885 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 299 transitions, 4662 flow [2024-06-21 19:43:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:04,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:04,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:04,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:43:04,886 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:04,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1749714701, now seen corresponding path program 5 times [2024-06-21 19:43:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681135364] [2024-06-21 19:43:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:08,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681135364] [2024-06-21 19:43:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681135364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:08,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733806457] [2024-06-21 19:43:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:08,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:08,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 299 transitions, 4662 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:08,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:08,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:08,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:10,776 INFO L124 PetriNetUnfolderBase]: 2185/3642 cut-off events. [2024-06-21 19:43:10,776 INFO L125 PetriNetUnfolderBase]: For 326011/326011 co-relation queries the response was YES. [2024-06-21 19:43:10,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31321 conditions, 3642 events. 2185/3642 cut-off events. For 326011/326011 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21876 event pairs, 665 based on Foata normal form. 36/3678 useless extension candidates. Maximal degree in co-relation 31233. Up to 2539 conditions per place. [2024-06-21 19:43:10,810 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 211 selfloop transitions, 100 changer transitions 16/332 dead transitions. [2024-06-21 19:43:10,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 332 transitions, 5793 flow [2024-06-21 19:43:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:43:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:43:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-21 19:43:10,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-21 19:43:10,811 INFO L175 Difference]: Start difference. First operand has 265 places, 299 transitions, 4662 flow. Second operand 12 states and 184 transitions. [2024-06-21 19:43:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 332 transitions, 5793 flow [2024-06-21 19:43:11,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 332 transitions, 5551 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-21 19:43:11,235 INFO L231 Difference]: Finished difference. Result has 259 places, 286 transitions, 4445 flow [2024-06-21 19:43:11,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4445, PETRI_PLACES=259, PETRI_TRANSITIONS=286} [2024-06-21 19:43:11,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 19:43:11,235 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 286 transitions, 4445 flow [2024-06-21 19:43:11,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:11,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:11,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:11,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:43:11,236 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:11,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -815586295, now seen corresponding path program 6 times [2024-06-21 19:43:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403170443] [2024-06-21 19:43:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403170443] [2024-06-21 19:43:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403170443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417285349] [2024-06-21 19:43:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:14,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:14,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:14,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:14,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 286 transitions, 4445 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:14,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:14,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:14,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:16,701 INFO L124 PetriNetUnfolderBase]: 2179/3629 cut-off events. [2024-06-21 19:43:16,702 INFO L125 PetriNetUnfolderBase]: For 314164/314164 co-relation queries the response was YES. [2024-06-21 19:43:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30813 conditions, 3629 events. 2179/3629 cut-off events. For 314164/314164 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21942 event pairs, 878 based on Foata normal form. 42/3671 useless extension candidates. Maximal degree in co-relation 30726. Up to 3088 conditions per place. [2024-06-21 19:43:16,738 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 229 selfloop transitions, 39 changer transitions 31/304 dead transitions. [2024-06-21 19:43:16,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 304 transitions, 5175 flow [2024-06-21 19:43:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 19:43:16,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-21 19:43:16,740 INFO L175 Difference]: Start difference. First operand has 259 places, 286 transitions, 4445 flow. Second operand 10 states and 146 transitions. [2024-06-21 19:43:16,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 304 transitions, 5175 flow [2024-06-21 19:43:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 304 transitions, 4875 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-21 19:43:17,240 INFO L231 Difference]: Finished difference. Result has 252 places, 265 transitions, 3871 flow [2024-06-21 19:43:17,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3871, PETRI_PLACES=252, PETRI_TRANSITIONS=265} [2024-06-21 19:43:17,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 19:43:17,241 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 265 transitions, 3871 flow [2024-06-21 19:43:17,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:17,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:43:17,241 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:17,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1560109303, now seen corresponding path program 7 times [2024-06-21 19:43:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799090909] [2024-06-21 19:43:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:20,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799090909] [2024-06-21 19:43:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799090909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:20,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202303585] [2024-06-21 19:43:20,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:20,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:20,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 265 transitions, 3871 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:20,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:20,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:20,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:22,699 INFO L124 PetriNetUnfolderBase]: 2118/3562 cut-off events. [2024-06-21 19:43:22,699 INFO L125 PetriNetUnfolderBase]: For 309251/309251 co-relation queries the response was YES. [2024-06-21 19:43:22,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29997 conditions, 3562 events. 2118/3562 cut-off events. For 309251/309251 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21740 event pairs, 830 based on Foata normal form. 36/3598 useless extension candidates. Maximal degree in co-relation 29909. Up to 2940 conditions per place. [2024-06-21 19:43:22,735 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 29 changer transitions 23/288 dead transitions. [2024-06-21 19:43:22,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 288 transitions, 4641 flow [2024-06-21 19:43:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 19:43:22,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36097560975609755 [2024-06-21 19:43:22,737 INFO L175 Difference]: Start difference. First operand has 252 places, 265 transitions, 3871 flow. Second operand 10 states and 148 transitions. [2024-06-21 19:43:22,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 288 transitions, 4641 flow [2024-06-21 19:43:23,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 288 transitions, 4518 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 19:43:23,168 INFO L231 Difference]: Finished difference. Result has 246 places, 251 transitions, 3454 flow [2024-06-21 19:43:23,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3454, PETRI_PLACES=246, PETRI_TRANSITIONS=251} [2024-06-21 19:43:23,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 19:43:23,169 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 251 transitions, 3454 flow [2024-06-21 19:43:23,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:23,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:23,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:23,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:43:23,169 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:23,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -576867520, now seen corresponding path program 1 times [2024-06-21 19:43:23,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924138714] [2024-06-21 19:43:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:29,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:29,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924138714] [2024-06-21 19:43:29,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924138714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:29,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:29,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:29,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297955696] [2024-06-21 19:43:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 251 transitions, 3454 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:30,697 INFO L124 PetriNetUnfolderBase]: 1930/3162 cut-off events. [2024-06-21 19:43:30,697 INFO L125 PetriNetUnfolderBase]: For 244968/244968 co-relation queries the response was YES. [2024-06-21 19:43:30,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 3162 events. 1930/3162 cut-off events. For 244968/244968 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18160 event pairs, 723 based on Foata normal form. 2/3156 useless extension candidates. Maximal degree in co-relation 27370. Up to 2712 conditions per place. [2024-06-21 19:43:30,727 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 44 changer transitions 1/287 dead transitions. [2024-06-21 19:43:30,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 287 transitions, 4447 flow [2024-06-21 19:43:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:43:30,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:43:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-21 19:43:30,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137472283813745 [2024-06-21 19:43:30,729 INFO L175 Difference]: Start difference. First operand has 246 places, 251 transitions, 3454 flow. Second operand 11 states and 172 transitions. [2024-06-21 19:43:30,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 287 transitions, 4447 flow [2024-06-21 19:43:31,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 287 transitions, 4290 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 19:43:31,097 INFO L231 Difference]: Finished difference. Result has 245 places, 252 transitions, 3423 flow [2024-06-21 19:43:31,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3423, PETRI_PLACES=245, PETRI_TRANSITIONS=252} [2024-06-21 19:43:31,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 19:43:31,097 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 252 transitions, 3423 flow [2024-06-21 19:43:31,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:31,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:31,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:31,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:43:31,098 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:31,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1507474176, now seen corresponding path program 2 times [2024-06-21 19:43:31,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:31,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022346333] [2024-06-21 19:43:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:31,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022346333] [2024-06-21 19:43:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022346333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:37,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:37,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838047494] [2024-06-21 19:43:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:37,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:37,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 252 transitions, 3423 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:37,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:37,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:37,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:39,049 INFO L124 PetriNetUnfolderBase]: 1977/3269 cut-off events. [2024-06-21 19:43:39,049 INFO L125 PetriNetUnfolderBase]: For 260895/260895 co-relation queries the response was YES. [2024-06-21 19:43:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28830 conditions, 3269 events. 1977/3269 cut-off events. For 260895/260895 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19120 event pairs, 749 based on Foata normal form. 2/3268 useless extension candidates. Maximal degree in co-relation 28744. Up to 2935 conditions per place. [2024-06-21 19:43:39,080 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 236 selfloop transitions, 41 changer transitions 1/283 dead transitions. [2024-06-21 19:43:39,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 283 transitions, 4314 flow [2024-06-21 19:43:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:43:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:43:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-21 19:43:39,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37028824833702884 [2024-06-21 19:43:39,081 INFO L175 Difference]: Start difference. First operand has 245 places, 252 transitions, 3423 flow. Second operand 11 states and 167 transitions. [2024-06-21 19:43:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 283 transitions, 4314 flow [2024-06-21 19:43:39,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 283 transitions, 4095 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-21 19:43:39,429 INFO L231 Difference]: Finished difference. Result has 245 places, 255 transitions, 3377 flow [2024-06-21 19:43:39,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3377, PETRI_PLACES=245, PETRI_TRANSITIONS=255} [2024-06-21 19:43:39,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 19:43:39,430 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 255 transitions, 3377 flow [2024-06-21 19:43:39,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:39,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:39,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:39,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:43:39,430 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:39,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1390307550, now seen corresponding path program 3 times [2024-06-21 19:43:39,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:39,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381164400] [2024-06-21 19:43:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:39,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381164400] [2024-06-21 19:43:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381164400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:45,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:45,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281571548] [2024-06-21 19:43:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:45,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:45,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 255 transitions, 3377 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:45,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:45,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:45,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:47,452 INFO L124 PetriNetUnfolderBase]: 1968/3264 cut-off events. [2024-06-21 19:43:47,452 INFO L125 PetriNetUnfolderBase]: For 261596/261596 co-relation queries the response was YES. [2024-06-21 19:43:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28438 conditions, 3264 events. 1968/3264 cut-off events. For 261596/261596 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19204 event pairs, 762 based on Foata normal form. 2/3264 useless extension candidates. Maximal degree in co-relation 28353. Up to 3001 conditions per place. [2024-06-21 19:43:47,484 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 40 changer transitions 1/278 dead transitions. [2024-06-21 19:43:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 278 transitions, 4039 flow [2024-06-21 19:43:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:43:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:43:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 168 transitions. [2024-06-21 19:43:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-21 19:43:47,485 INFO L175 Difference]: Start difference. First operand has 245 places, 255 transitions, 3377 flow. Second operand 12 states and 168 transitions. [2024-06-21 19:43:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 278 transitions, 4039 flow [2024-06-21 19:43:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 278 transitions, 3935 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:43:47,909 INFO L231 Difference]: Finished difference. Result has 249 places, 256 transitions, 3394 flow [2024-06-21 19:43:47,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3394, PETRI_PLACES=249, PETRI_TRANSITIONS=256} [2024-06-21 19:43:47,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 19:43:47,910 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 256 transitions, 3394 flow [2024-06-21 19:43:47,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:47,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:47,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:47,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:43:47,911 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:47,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2146931277, now seen corresponding path program 8 times [2024-06-21 19:43:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380390830] [2024-06-21 19:43:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380390830] [2024-06-21 19:43:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380390830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:53,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:53,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:53,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865882710] [2024-06-21 19:43:53,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:53,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:43:53,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 256 transitions, 3394 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:53,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:53,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:43:53,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:55,201 INFO L124 PetriNetUnfolderBase]: 1984/3298 cut-off events. [2024-06-21 19:43:55,201 INFO L125 PetriNetUnfolderBase]: For 281375/281375 co-relation queries the response was YES. [2024-06-21 19:43:55,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28787 conditions, 3298 events. 1984/3298 cut-off events. For 281375/281375 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19331 event pairs, 418 based on Foata normal form. 6/3304 useless extension candidates. Maximal degree in co-relation 28701. Up to 2604 conditions per place. [2024-06-21 19:43:55,233 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 50 changer transitions 0/294 dead transitions. [2024-06-21 19:43:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 294 transitions, 4386 flow [2024-06-21 19:43:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:43:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:43:55,235 INFO L175 Difference]: Start difference. First operand has 249 places, 256 transitions, 3394 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:43:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 294 transitions, 4386 flow [2024-06-21 19:43:55,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 294 transitions, 4278 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:43:55,646 INFO L231 Difference]: Finished difference. Result has 249 places, 258 transitions, 3418 flow [2024-06-21 19:43:55,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3418, PETRI_PLACES=249, PETRI_TRANSITIONS=258} [2024-06-21 19:43:55,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 19:43:55,647 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 258 transitions, 3418 flow [2024-06-21 19:43:55,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:55,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:55,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:55,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:43:55,647 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:55,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1390301598, now seen corresponding path program 1 times [2024-06-21 19:43:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:55,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861258210] [2024-06-21 19:43:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:02,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:02,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861258210] [2024-06-21 19:44:02,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861258210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:02,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:02,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:44:02,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316925105] [2024-06-21 19:44:02,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:02,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:44:02,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:44:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:44:02,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:02,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 258 transitions, 3418 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:02,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:02,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:04,755 INFO L124 PetriNetUnfolderBase]: 1999/3337 cut-off events. [2024-06-21 19:44:04,755 INFO L125 PetriNetUnfolderBase]: For 288812/288812 co-relation queries the response was YES. [2024-06-21 19:44:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29172 conditions, 3337 events. 1999/3337 cut-off events. For 288812/288812 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19861 event pairs, 761 based on Foata normal form. 8/3345 useless extension candidates. Maximal degree in co-relation 29085. Up to 3018 conditions per place. [2024-06-21 19:44:04,788 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 34 changer transitions 13/282 dead transitions. [2024-06-21 19:44:04,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 282 transitions, 4097 flow [2024-06-21 19:44:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:44:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:44:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-06-21 19:44:04,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698447893569846 [2024-06-21 19:44:04,790 INFO L175 Difference]: Start difference. First operand has 249 places, 258 transitions, 3418 flow. Second operand 11 states and 161 transitions. [2024-06-21 19:44:04,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 282 transitions, 4097 flow [2024-06-21 19:44:05,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 282 transitions, 4016 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:05,304 INFO L231 Difference]: Finished difference. Result has 254 places, 252 transitions, 3337 flow [2024-06-21 19:44:05,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3337, PETRI_PLACES=254, PETRI_TRANSITIONS=252} [2024-06-21 19:44:05,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-21 19:44:05,304 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 252 transitions, 3337 flow [2024-06-21 19:44:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:05,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:05,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:05,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:44:05,305 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:05,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2147200047, now seen corresponding path program 9 times [2024-06-21 19:44:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332130442] [2024-06-21 19:44:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332130442] [2024-06-21 19:44:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332130442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:11,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695492532] [2024-06-21 19:44:11,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:11,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:11,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:11,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:11,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 252 transitions, 3337 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:11,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:11,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:11,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:12,654 INFO L124 PetriNetUnfolderBase]: 1979/3311 cut-off events. [2024-06-21 19:44:12,655 INFO L125 PetriNetUnfolderBase]: For 295942/295942 co-relation queries the response was YES. [2024-06-21 19:44:12,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28793 conditions, 3311 events. 1979/3311 cut-off events. For 295942/295942 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19495 event pairs, 437 based on Foata normal form. 6/3317 useless extension candidates. Maximal degree in co-relation 28705. Up to 2577 conditions per place. [2024-06-21 19:44:12,686 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 47 changer transitions 0/287 dead transitions. [2024-06-21 19:44:12,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 287 transitions, 4314 flow [2024-06-21 19:44:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 19:44:12,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-21 19:44:12,687 INFO L175 Difference]: Start difference. First operand has 254 places, 252 transitions, 3337 flow. Second operand 10 states and 158 transitions. [2024-06-21 19:44:12,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 287 transitions, 4314 flow [2024-06-21 19:44:13,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 287 transitions, 4217 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 19:44:13,125 INFO L231 Difference]: Finished difference. Result has 247 places, 253 transitions, 3359 flow [2024-06-21 19:44:13,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3359, PETRI_PLACES=247, PETRI_TRANSITIONS=253} [2024-06-21 19:44:13,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 19:44:13,126 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 253 transitions, 3359 flow [2024-06-21 19:44:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:13,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:13,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:44:13,126 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:13,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2147200388, now seen corresponding path program 4 times [2024-06-21 19:44:13,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:13,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639802057] [2024-06-21 19:44:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:18,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639802057] [2024-06-21 19:44:18,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639802057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:18,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165562376] [2024-06-21 19:44:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:18,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 253 transitions, 3359 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:20,491 INFO L124 PetriNetUnfolderBase]: 2053/3425 cut-off events. [2024-06-21 19:44:20,491 INFO L125 PetriNetUnfolderBase]: For 289177/289177 co-relation queries the response was YES. [2024-06-21 19:44:20,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29708 conditions, 3425 events. 2053/3425 cut-off events. For 289177/289177 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20353 event pairs, 516 based on Foata normal form. 8/3433 useless extension candidates. Maximal degree in co-relation 29623. Up to 2876 conditions per place. [2024-06-21 19:44:20,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 47 changer transitions 0/291 dead transitions. [2024-06-21 19:44:20,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 291 transitions, 4269 flow [2024-06-21 19:44:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:44:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:44:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-21 19:44:20,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-21 19:44:20,525 INFO L175 Difference]: Start difference. First operand has 247 places, 253 transitions, 3359 flow. Second operand 11 states and 170 transitions. [2024-06-21 19:44:20,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 291 transitions, 4269 flow [2024-06-21 19:44:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 291 transitions, 4188 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:44:21,028 INFO L231 Difference]: Finished difference. Result has 251 places, 255 transitions, 3426 flow [2024-06-21 19:44:21,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3426, PETRI_PLACES=251, PETRI_TRANSITIONS=255} [2024-06-21 19:44:21,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 19:44:21,028 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 255 transitions, 3426 flow [2024-06-21 19:44:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:21,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:21,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:21,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:44:21,029 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:21,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1822639838, now seen corresponding path program 5 times [2024-06-21 19:44:21,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:21,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306935176] [2024-06-21 19:44:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:25,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306935176] [2024-06-21 19:44:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306935176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:25,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:25,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542738117] [2024-06-21 19:44:25,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:25,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:25,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 255 transitions, 3426 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:25,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:25,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:26,766 INFO L124 PetriNetUnfolderBase]: 2193/3620 cut-off events. [2024-06-21 19:44:26,766 INFO L125 PetriNetUnfolderBase]: For 335447/335447 co-relation queries the response was YES. [2024-06-21 19:44:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32704 conditions, 3620 events. 2193/3620 cut-off events. For 335447/335447 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21519 event pairs, 536 based on Foata normal form. 8/3628 useless extension candidates. Maximal degree in co-relation 32618. Up to 2152 conditions per place. [2024-06-21 19:44:26,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 120 changer transitions 0/314 dead transitions. [2024-06-21 19:44:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 314 transitions, 4853 flow [2024-06-21 19:44:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:44:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:44:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-21 19:44:26,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2024-06-21 19:44:26,804 INFO L175 Difference]: Start difference. First operand has 251 places, 255 transitions, 3426 flow. Second operand 12 states and 209 transitions. [2024-06-21 19:44:26,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 314 transitions, 4853 flow [2024-06-21 19:44:27,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 314 transitions, 4720 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:44:27,309 INFO L231 Difference]: Finished difference. Result has 258 places, 264 transitions, 3803 flow [2024-06-21 19:44:27,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3803, PETRI_PLACES=258, PETRI_TRANSITIONS=264} [2024-06-21 19:44:27,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 19:44:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 264 transitions, 3803 flow [2024-06-21 19:44:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:27,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:27,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:44:27,310 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:27,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1823026129, now seen corresponding path program 10 times [2024-06-21 19:44:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577451772] [2024-06-21 19:44:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:32,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:32,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577451772] [2024-06-21 19:44:32,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577451772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:32,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278125882] [2024-06-21 19:44:32,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:32,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:32,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 264 transitions, 3803 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:32,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:32,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:32,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:34,351 INFO L124 PetriNetUnfolderBase]: 2213/3679 cut-off events. [2024-06-21 19:44:34,352 INFO L125 PetriNetUnfolderBase]: For 353288/353288 co-relation queries the response was YES. [2024-06-21 19:44:34,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33633 conditions, 3679 events. 2213/3679 cut-off events. For 353288/353288 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22060 event pairs, 517 based on Foata normal form. 6/3685 useless extension candidates. Maximal degree in co-relation 33543. Up to 3164 conditions per place. [2024-06-21 19:44:34,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 43 changer transitions 0/294 dead transitions. [2024-06-21 19:44:34,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 294 transitions, 4637 flow [2024-06-21 19:44:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 19:44:34,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-21 19:44:34,393 INFO L175 Difference]: Start difference. First operand has 258 places, 264 transitions, 3803 flow. Second operand 10 states and 154 transitions. [2024-06-21 19:44:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 294 transitions, 4637 flow [2024-06-21 19:44:34,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 294 transitions, 4443 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 19:44:35,033 INFO L231 Difference]: Finished difference. Result has 263 places, 265 transitions, 3711 flow [2024-06-21 19:44:35,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3609, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3711, PETRI_PLACES=263, PETRI_TRANSITIONS=265} [2024-06-21 19:44:35,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 19:44:35,034 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 265 transitions, 3711 flow [2024-06-21 19:44:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:35,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:35,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:44:35,034 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1823025788, now seen corresponding path program 6 times [2024-06-21 19:44:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:35,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129638503] [2024-06-21 19:44:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129638503] [2024-06-21 19:44:40,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129638503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:40,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:40,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509637258] [2024-06-21 19:44:40,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:40,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 265 transitions, 3711 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:40,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:40,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:41,972 INFO L124 PetriNetUnfolderBase]: 2208/3674 cut-off events. [2024-06-21 19:44:41,972 INFO L125 PetriNetUnfolderBase]: For 352929/352929 co-relation queries the response was YES. [2024-06-21 19:44:41,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 3674 events. 2208/3674 cut-off events. For 352929/352929 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22068 event pairs, 530 based on Foata normal form. 2/3676 useless extension candidates. Maximal degree in co-relation 33427. Up to 3226 conditions per place. [2024-06-21 19:44:42,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 43 changer transitions 0/292 dead transitions. [2024-06-21 19:44:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 292 transitions, 4516 flow [2024-06-21 19:44:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 19:44:42,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36829268292682926 [2024-06-21 19:44:42,010 INFO L175 Difference]: Start difference. First operand has 263 places, 265 transitions, 3711 flow. Second operand 10 states and 151 transitions. [2024-06-21 19:44:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 292 transitions, 4516 flow [2024-06-21 19:44:42,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 292 transitions, 4377 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 19:44:42,643 INFO L231 Difference]: Finished difference. Result has 265 places, 266 transitions, 3694 flow [2024-06-21 19:44:42,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3694, PETRI_PLACES=265, PETRI_TRANSITIONS=266} [2024-06-21 19:44:42,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 19:44:42,643 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 266 transitions, 3694 flow [2024-06-21 19:44:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:42,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:42,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:44:42,644 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:42,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1826779968, now seen corresponding path program 7 times [2024-06-21 19:44:42,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:42,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811381509] [2024-06-21 19:44:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811381509] [2024-06-21 19:44:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811381509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:46,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515069505] [2024-06-21 19:44:46,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:46,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:46,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 266 transitions, 3694 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:46,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:46,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:46,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:48,479 INFO L124 PetriNetUnfolderBase]: 2376/3931 cut-off events. [2024-06-21 19:44:48,479 INFO L125 PetriNetUnfolderBase]: For 416940/416940 co-relation queries the response was YES. [2024-06-21 19:44:48,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36449 conditions, 3931 events. 2376/3931 cut-off events. For 416940/416940 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23813 event pairs, 869 based on Foata normal form. 16/3944 useless extension candidates. Maximal degree in co-relation 36356. Up to 3315 conditions per place. [2024-06-21 19:44:48,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 105 changer transitions 0/318 dead transitions. [2024-06-21 19:44:48,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 318 transitions, 4866 flow [2024-06-21 19:44:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:44:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:44:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-21 19:44:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41088180112570355 [2024-06-21 19:44:48,516 INFO L175 Difference]: Start difference. First operand has 265 places, 266 transitions, 3694 flow. Second operand 13 states and 219 transitions. [2024-06-21 19:44:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 318 transitions, 4866 flow [2024-06-21 19:44:49,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 318 transitions, 4785 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:44:49,074 INFO L231 Difference]: Finished difference. Result has 273 places, 274 transitions, 4079 flow [2024-06-21 19:44:49,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4079, PETRI_PLACES=273, PETRI_TRANSITIONS=274} [2024-06-21 19:44:49,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 19:44:49,074 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 274 transitions, 4079 flow [2024-06-21 19:44:49,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:44:49,075 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1448263458, now seen corresponding path program 8 times [2024-06-21 19:44:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132020030] [2024-06-21 19:44:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132020030] [2024-06-21 19:44:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132020030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:55,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578286528] [2024-06-21 19:44:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:55,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:55,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:55,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:44:55,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 274 transitions, 4079 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:55,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:55,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:44:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:57,094 INFO L124 PetriNetUnfolderBase]: 2371/3929 cut-off events. [2024-06-21 19:44:57,094 INFO L125 PetriNetUnfolderBase]: For 417164/417164 co-relation queries the response was YES. [2024-06-21 19:44:57,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37191 conditions, 3929 events. 2371/3929 cut-off events. For 417164/417164 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23908 event pairs, 924 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 37095. Up to 3642 conditions per place. [2024-06-21 19:44:57,141 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 256 selfloop transitions, 30 changer transitions 1/292 dead transitions. [2024-06-21 19:44:57,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 292 transitions, 4736 flow [2024-06-21 19:44:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:44:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:44:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 19:44:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3348115299334812 [2024-06-21 19:44:57,143 INFO L175 Difference]: Start difference. First operand has 273 places, 274 transitions, 4079 flow. Second operand 11 states and 151 transitions. [2024-06-21 19:44:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 292 transitions, 4736 flow [2024-06-21 19:44:57,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 292 transitions, 4528 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 19:44:57,861 INFO L231 Difference]: Finished difference. Result has 276 places, 274 transitions, 3946 flow [2024-06-21 19:44:57,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3946, PETRI_PLACES=276, PETRI_TRANSITIONS=274} [2024-06-21 19:44:57,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 19:44:57,861 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 274 transitions, 3946 flow [2024-06-21 19:44:57,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:57,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:57,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:44:57,862 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:57,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1448115588, now seen corresponding path program 9 times [2024-06-21 19:44:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:57,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686467815] [2024-06-21 19:44:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:57,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:05,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:05,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686467815] [2024-06-21 19:45:05,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686467815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:05,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:05,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578640371] [2024-06-21 19:45:05,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:05,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:05,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:05,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:05,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 274 transitions, 3946 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:05,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:05,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:07,269 INFO L124 PetriNetUnfolderBase]: 2355/3896 cut-off events. [2024-06-21 19:45:07,269 INFO L125 PetriNetUnfolderBase]: For 419621/419621 co-relation queries the response was YES. [2024-06-21 19:45:07,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36508 conditions, 3896 events. 2355/3896 cut-off events. For 419621/419621 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23623 event pairs, 905 based on Foata normal form. 2/3896 useless extension candidates. Maximal degree in co-relation 36410. Up to 3546 conditions per place. [2024-06-21 19:45:07,314 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 31 changer transitions 1/298 dead transitions. [2024-06-21 19:45:07,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 298 transitions, 4819 flow [2024-06-21 19:45:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-21 19:45:07,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 19:45:07,315 INFO L175 Difference]: Start difference. First operand has 276 places, 274 transitions, 3946 flow. Second operand 10 states and 150 transitions. [2024-06-21 19:45:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 298 transitions, 4819 flow [2024-06-21 19:45:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 298 transitions, 4733 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:45:08,100 INFO L231 Difference]: Finished difference. Result has 277 places, 275 transitions, 3964 flow [2024-06-21 19:45:08,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3964, PETRI_PLACES=277, PETRI_TRANSITIONS=275} [2024-06-21 19:45:08,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 19:45:08,101 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 275 transitions, 3964 flow [2024-06-21 19:45:08,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:08,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:08,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:08,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:45:08,101 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:08,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:08,102 INFO L85 PathProgramCache]: Analyzing trace with hash 28430970, now seen corresponding path program 10 times [2024-06-21 19:45:08,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:08,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269358164] [2024-06-21 19:45:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269358164] [2024-06-21 19:45:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269358164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:12,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533849463] [2024-06-21 19:45:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:12,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:12,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 275 transitions, 3964 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:12,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:12,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:12,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:14,064 INFO L124 PetriNetUnfolderBase]: 2451/4025 cut-off events. [2024-06-21 19:45:14,064 INFO L125 PetriNetUnfolderBase]: For 479236/479236 co-relation queries the response was YES. [2024-06-21 19:45:14,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38868 conditions, 4025 events. 2451/4025 cut-off events. For 479236/479236 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24365 event pairs, 908 based on Foata normal form. 8/4028 useless extension candidates. Maximal degree in co-relation 38769. Up to 2986 conditions per place. [2024-06-21 19:45:14,109 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 112 changer transitions 0/324 dead transitions. [2024-06-21 19:45:14,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 324 transitions, 5222 flow [2024-06-21 19:45:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:45:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:45:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-21 19:45:14,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052532833020638 [2024-06-21 19:45:14,110 INFO L175 Difference]: Start difference. First operand has 277 places, 275 transitions, 3964 flow. Second operand 13 states and 216 transitions. [2024-06-21 19:45:14,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 324 transitions, 5222 flow [2024-06-21 19:45:14,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 324 transitions, 5086 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 19:45:15,001 INFO L231 Difference]: Finished difference. Result has 281 places, 282 transitions, 4266 flow [2024-06-21 19:45:15,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4266, PETRI_PLACES=281, PETRI_TRANSITIONS=282} [2024-06-21 19:45:15,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 19:45:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 282 transitions, 4266 flow [2024-06-21 19:45:15,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:15,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:15,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:45:15,002 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:15,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1819161408, now seen corresponding path program 11 times [2024-06-21 19:45:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297609315] [2024-06-21 19:45:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:19,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297609315] [2024-06-21 19:45:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297609315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414286229] [2024-06-21 19:45:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:19,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:19,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:19,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:19,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 282 transitions, 4266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:19,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:19,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:19,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:21,542 INFO L124 PetriNetUnfolderBase]: 2443/4035 cut-off events. [2024-06-21 19:45:21,542 INFO L125 PetriNetUnfolderBase]: For 502222/502222 co-relation queries the response was YES. [2024-06-21 19:45:21,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38768 conditions, 4035 events. 2443/4035 cut-off events. For 502222/502222 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24552 event pairs, 965 based on Foata normal form. 18/4053 useless extension candidates. Maximal degree in co-relation 38669. Up to 3590 conditions per place. [2024-06-21 19:45:21,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 96 changer transitions 0/319 dead transitions. [2024-06-21 19:45:21,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 319 transitions, 5064 flow [2024-06-21 19:45:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:45:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:45:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 19:45:21,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39399624765478425 [2024-06-21 19:45:21,594 INFO L175 Difference]: Start difference. First operand has 281 places, 282 transitions, 4266 flow. Second operand 13 states and 210 transitions. [2024-06-21 19:45:21,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 319 transitions, 5064 flow [2024-06-21 19:45:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 319 transitions, 4822 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:22,617 INFO L231 Difference]: Finished difference. Result has 287 places, 283 transitions, 4258 flow [2024-06-21 19:45:22,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4258, PETRI_PLACES=287, PETRI_TRANSITIONS=283} [2024-06-21 19:45:22,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 19:45:22,618 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 283 transitions, 4258 flow [2024-06-21 19:45:22,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:22,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:22,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:22,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:45:22,618 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -935591863, now seen corresponding path program 11 times [2024-06-21 19:45:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003006490] [2024-06-21 19:45:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003006490] [2024-06-21 19:45:28,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003006490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:28,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:28,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:28,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13817781] [2024-06-21 19:45:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:28,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:28,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:28,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 283 transitions, 4258 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:28,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:30,663 INFO L124 PetriNetUnfolderBase]: 2463/4073 cut-off events. [2024-06-21 19:45:30,664 INFO L125 PetriNetUnfolderBase]: For 488363/488363 co-relation queries the response was YES. [2024-06-21 19:45:30,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38888 conditions, 4073 events. 2463/4073 cut-off events. For 488363/488363 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24904 event pairs, 912 based on Foata normal form. 6/4079 useless extension candidates. Maximal degree in co-relation 38787. Up to 3739 conditions per place. [2024-06-21 19:45:30,710 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 33 changer transitions 0/304 dead transitions. [2024-06-21 19:45:30,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 304 transitions, 4938 flow [2024-06-21 19:45:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-21 19:45:30,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35121951219512193 [2024-06-21 19:45:30,711 INFO L175 Difference]: Start difference. First operand has 287 places, 283 transitions, 4258 flow. Second operand 10 states and 144 transitions. [2024-06-21 19:45:30,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 304 transitions, 4938 flow [2024-06-21 19:45:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 304 transitions, 4736 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 19:45:31,675 INFO L231 Difference]: Finished difference. Result has 286 places, 284 transitions, 4140 flow [2024-06-21 19:45:31,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4140, PETRI_PLACES=286, PETRI_TRANSITIONS=284} [2024-06-21 19:45:31,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 19:45:31,675 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 284 transitions, 4140 flow [2024-06-21 19:45:31,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:31,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:31,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:45:31,676 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:31,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:31,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2046631776, now seen corresponding path program 12 times [2024-06-21 19:45:31,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:31,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436494634] [2024-06-21 19:45:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:36,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436494634] [2024-06-21 19:45:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436494634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:36,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:36,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620079413] [2024-06-21 19:45:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:36,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:36,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:36,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 284 transitions, 4140 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:36,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:36,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:36,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:38,567 INFO L124 PetriNetUnfolderBase]: 2458/4062 cut-off events. [2024-06-21 19:45:38,567 INFO L125 PetriNetUnfolderBase]: For 486416/486416 co-relation queries the response was YES. [2024-06-21 19:45:38,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38619 conditions, 4062 events. 2458/4062 cut-off events. For 486416/486416 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24797 event pairs, 922 based on Foata normal form. 2/4062 useless extension candidates. Maximal degree in co-relation 38517. Up to 3714 conditions per place. [2024-06-21 19:45:38,611 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 33 changer transitions 0/305 dead transitions. [2024-06-21 19:45:38,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 305 transitions, 4946 flow [2024-06-21 19:45:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-21 19:45:38,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-21 19:45:38,613 INFO L175 Difference]: Start difference. First operand has 286 places, 284 transitions, 4140 flow. Second operand 10 states and 145 transitions. [2024-06-21 19:45:38,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 305 transitions, 4946 flow [2024-06-21 19:45:39,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 305 transitions, 4848 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:45:39,328 INFO L231 Difference]: Finished difference. Result has 288 places, 284 transitions, 4113 flow [2024-06-21 19:45:39,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4113, PETRI_PLACES=288, PETRI_TRANSITIONS=284} [2024-06-21 19:45:39,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 19:45:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 284 transitions, 4113 flow [2024-06-21 19:45:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:39,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:39,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:39,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:45:39,329 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:39,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1448269410, now seen corresponding path program 2 times [2024-06-21 19:45:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:39,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223738705] [2024-06-21 19:45:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223738705] [2024-06-21 19:45:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223738705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:47,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:47,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46729874] [2024-06-21 19:45:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:47,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:47,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 284 transitions, 4113 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:47,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:47,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:49,250 INFO L124 PetriNetUnfolderBase]: 2466/4072 cut-off events. [2024-06-21 19:45:49,250 INFO L125 PetriNetUnfolderBase]: For 510482/510482 co-relation queries the response was YES. [2024-06-21 19:45:49,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38734 conditions, 4072 events. 2466/4072 cut-off events. For 510482/510482 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24786 event pairs, 943 based on Foata normal form. 8/4080 useless extension candidates. Maximal degree in co-relation 38631. Up to 3759 conditions per place. [2024-06-21 19:45:49,298 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 24 changer transitions 13/304 dead transitions. [2024-06-21 19:45:49,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 304 transitions, 4830 flow [2024-06-21 19:45:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:45:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:45:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:45:49,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-21 19:45:49,299 INFO L175 Difference]: Start difference. First operand has 288 places, 284 transitions, 4113 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:45:49,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 304 transitions, 4830 flow [2024-06-21 19:45:50,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 304 transitions, 4756 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:45:50,100 INFO L231 Difference]: Finished difference. Result has 289 places, 278 transitions, 4013 flow [2024-06-21 19:45:50,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4013, PETRI_PLACES=289, PETRI_TRANSITIONS=278} [2024-06-21 19:45:50,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 19:45:50,101 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 278 transitions, 4013 flow [2024-06-21 19:45:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:50,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:50,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:50,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:45:50,101 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:50,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1677396395, now seen corresponding path program 12 times [2024-06-21 19:45:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:50,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716569274] [2024-06-21 19:45:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:50,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:55,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:55,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716569274] [2024-06-21 19:45:55,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716569274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:55,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:55,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:55,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399154353] [2024-06-21 19:45:55,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:55,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:45:55,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 278 transitions, 4013 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:55,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:55,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:45:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:57,943 INFO L124 PetriNetUnfolderBase]: 2388/3950 cut-off events. [2024-06-21 19:45:57,943 INFO L125 PetriNetUnfolderBase]: For 503379/503379 co-relation queries the response was YES. [2024-06-21 19:45:57,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37413 conditions, 3950 events. 2388/3950 cut-off events. For 503379/503379 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23914 event pairs, 954 based on Foata normal form. 8/3958 useless extension candidates. Maximal degree in co-relation 37309. Up to 3693 conditions per place. [2024-06-21 19:45:57,991 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 20 changer transitions 0/293 dead transitions. [2024-06-21 19:45:57,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 293 transitions, 4674 flow [2024-06-21 19:45:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 19:45:57,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33414634146341465 [2024-06-21 19:45:57,992 INFO L175 Difference]: Start difference. First operand has 289 places, 278 transitions, 4013 flow. Second operand 10 states and 137 transitions. [2024-06-21 19:45:57,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 293 transitions, 4674 flow [2024-06-21 19:45:58,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 293 transitions, 4608 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 19:45:58,841 INFO L231 Difference]: Finished difference. Result has 284 places, 279 transitions, 4009 flow [2024-06-21 19:45:58,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4009, PETRI_PLACES=284, PETRI_TRANSITIONS=279} [2024-06-21 19:45:58,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 19:45:58,842 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 279 transitions, 4009 flow [2024-06-21 19:45:58,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:58,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:58,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:58,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:45:58,842 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -248309982, now seen corresponding path program 13 times [2024-06-21 19:45:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232279470] [2024-06-21 19:45:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232279470] [2024-06-21 19:46:04,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232279470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:04,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:04,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:04,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934350189] [2024-06-21 19:46:04,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:04,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:04,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:04,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:04,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 279 transitions, 4009 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:04,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:04,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:04,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:06,532 INFO L124 PetriNetUnfolderBase]: 2396/3962 cut-off events. [2024-06-21 19:46:06,532 INFO L125 PetriNetUnfolderBase]: For 450724/450724 co-relation queries the response was YES. [2024-06-21 19:46:06,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36858 conditions, 3962 events. 2396/3962 cut-off events. For 450724/450724 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23996 event pairs, 956 based on Foata normal form. 2/3964 useless extension candidates. Maximal degree in co-relation 36757. Up to 3728 conditions per place. [2024-06-21 19:46:06,579 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 263 selfloop transitions, 24 changer transitions 0/292 dead transitions. [2024-06-21 19:46:06,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 292 transitions, 4670 flow [2024-06-21 19:46:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:46:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:46:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 19:46:06,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33170731707317075 [2024-06-21 19:46:06,580 INFO L175 Difference]: Start difference. First operand has 284 places, 279 transitions, 4009 flow. Second operand 10 states and 136 transitions. [2024-06-21 19:46:06,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 292 transitions, 4670 flow [2024-06-21 19:46:07,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 292 transitions, 4627 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:46:07,414 INFO L231 Difference]: Finished difference. Result has 286 places, 281 transitions, 4084 flow [2024-06-21 19:46:07,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4084, PETRI_PLACES=286, PETRI_TRANSITIONS=281} [2024-06-21 19:46:07,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 19:46:07,415 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 281 transitions, 4084 flow [2024-06-21 19:46:07,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:07,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:07,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:46:07,415 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:07,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -248457852, now seen corresponding path program 14 times [2024-06-21 19:46:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983229011] [2024-06-21 19:46:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:13,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:13,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983229011] [2024-06-21 19:46:13,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983229011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:13,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:13,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:13,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886970899] [2024-06-21 19:46:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:13,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:13,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 281 transitions, 4084 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:14,851 INFO L124 PetriNetUnfolderBase]: 2391/3937 cut-off events. [2024-06-21 19:46:14,851 INFO L125 PetriNetUnfolderBase]: For 456681/456681 co-relation queries the response was YES. [2024-06-21 19:46:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36903 conditions, 3937 events. 2391/3937 cut-off events. For 456681/456681 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23682 event pairs, 923 based on Foata normal form. 2/3935 useless extension candidates. Maximal degree in co-relation 36801. Up to 3649 conditions per place. [2024-06-21 19:46:14,895 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 268 selfloop transitions, 26 changer transitions 0/299 dead transitions. [2024-06-21 19:46:14,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 299 transitions, 4945 flow [2024-06-21 19:46:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:46:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:46:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 19:46:14,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-21 19:46:14,896 INFO L175 Difference]: Start difference. First operand has 286 places, 281 transitions, 4084 flow. Second operand 10 states and 142 transitions. [2024-06-21 19:46:14,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 299 transitions, 4945 flow [2024-06-21 19:46:15,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 299 transitions, 4848 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 19:46:15,771 INFO L231 Difference]: Finished difference. Result has 288 places, 283 transitions, 4111 flow [2024-06-21 19:46:15,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4111, PETRI_PLACES=288, PETRI_TRANSITIONS=283} [2024-06-21 19:46:15,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 19:46:15,771 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 283 transitions, 4111 flow [2024-06-21 19:46:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:15,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:15,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:46:15,772 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:15,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 122587968, now seen corresponding path program 15 times [2024-06-21 19:46:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744158852] [2024-06-21 19:46:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:19,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744158852] [2024-06-21 19:46:19,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744158852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:19,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769740638] [2024-06-21 19:46:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:19,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:19,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:19,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 283 transitions, 4111 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:19,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:19,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:19,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:21,833 INFO L124 PetriNetUnfolderBase]: 2427/3999 cut-off events. [2024-06-21 19:46:21,833 INFO L125 PetriNetUnfolderBase]: For 488588/488588 co-relation queries the response was YES. [2024-06-21 19:46:21,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37662 conditions, 3999 events. 2427/3999 cut-off events. For 488588/488588 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24178 event pairs, 940 based on Foata normal form. 10/4009 useless extension candidates. Maximal degree in co-relation 37559. Up to 3649 conditions per place. [2024-06-21 19:46:21,883 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 80 changer transitions 0/309 dead transitions. [2024-06-21 19:46:21,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 309 transitions, 4883 flow [2024-06-21 19:46:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:46:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:46:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-21 19:46:21,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678861788617886 [2024-06-21 19:46:21,884 INFO L175 Difference]: Start difference. First operand has 288 places, 283 transitions, 4111 flow. Second operand 12 states and 181 transitions. [2024-06-21 19:46:21,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 309 transitions, 4883 flow [2024-06-21 19:46:22,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 309 transitions, 4765 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 19:46:22,868 INFO L231 Difference]: Finished difference. Result has 292 places, 284 transitions, 4191 flow [2024-06-21 19:46:22,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4191, PETRI_PLACES=292, PETRI_TRANSITIONS=284} [2024-06-21 19:46:22,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 19:46:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 284 transitions, 4191 flow [2024-06-21 19:46:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:22,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:46:22,869 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -248458193, now seen corresponding path program 13 times [2024-06-21 19:46:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689996471] [2024-06-21 19:46:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:28,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689996471] [2024-06-21 19:46:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689996471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:28,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102449445] [2024-06-21 19:46:28,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:28,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:28,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 284 transitions, 4191 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:28,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:28,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:28,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:30,112 INFO L124 PetriNetUnfolderBase]: 2414/3978 cut-off events. [2024-06-21 19:46:30,112 INFO L125 PetriNetUnfolderBase]: For 478852/478852 co-relation queries the response was YES. [2024-06-21 19:46:30,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37244 conditions, 3978 events. 2414/3978 cut-off events. For 478852/478852 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24028 event pairs, 920 based on Foata normal form. 6/3984 useless extension candidates. Maximal degree in co-relation 37141. Up to 3705 conditions per place. [2024-06-21 19:46:30,167 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 22 changer transitions 0/301 dead transitions. [2024-06-21 19:46:30,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 301 transitions, 4877 flow [2024-06-21 19:46:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:46:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:46:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 19:46:30,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-21 19:46:30,169 INFO L175 Difference]: Start difference. First operand has 292 places, 284 transitions, 4191 flow. Second operand 10 states and 140 transitions. [2024-06-21 19:46:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 301 transitions, 4877 flow [2024-06-21 19:46:31,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 301 transitions, 4713 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:46:31,219 INFO L231 Difference]: Finished difference. Result has 293 places, 284 transitions, 4075 flow [2024-06-21 19:46:31,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4075, PETRI_PLACES=293, PETRI_TRANSITIONS=284} [2024-06-21 19:46:31,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 19:46:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 284 transitions, 4075 flow [2024-06-21 19:46:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:46:31,220 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1476937310, now seen corresponding path program 16 times [2024-06-21 19:46:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929862314] [2024-06-21 19:46:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929862314] [2024-06-21 19:46:36,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929862314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:36,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:36,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:36,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605079119] [2024-06-21 19:46:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:36,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:36,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:36,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:36,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 284 transitions, 4075 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:36,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:36,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:36,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:39,045 INFO L124 PetriNetUnfolderBase]: 2554/4222 cut-off events. [2024-06-21 19:46:39,045 INFO L125 PetriNetUnfolderBase]: For 603715/603715 co-relation queries the response was YES. [2024-06-21 19:46:39,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38889 conditions, 4222 events. 2554/4222 cut-off events. For 603715/603715 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 26014 event pairs, 953 based on Foata normal form. 44/4266 useless extension candidates. Maximal degree in co-relation 38785. Up to 3656 conditions per place. [2024-06-21 19:46:39,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 71 changer transitions 13/315 dead transitions. [2024-06-21 19:46:39,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 315 transitions, 4889 flow [2024-06-21 19:46:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 19:46:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 19:46:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 215 transitions. [2024-06-21 19:46:39,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-21 19:46:39,099 INFO L175 Difference]: Start difference. First operand has 293 places, 284 transitions, 4075 flow. Second operand 15 states and 215 transitions. [2024-06-21 19:46:39,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 315 transitions, 4889 flow [2024-06-21 19:46:40,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 315 transitions, 4815 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:46:40,108 INFO L231 Difference]: Finished difference. Result has 299 places, 274 transitions, 4060 flow [2024-06-21 19:46:40,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4060, PETRI_PLACES=299, PETRI_TRANSITIONS=274} [2024-06-21 19:46:40,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 19:46:40,109 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 274 transitions, 4060 flow [2024-06-21 19:46:40,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:40,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:40,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:40,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:46:40,109 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:40,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1621920162, now seen corresponding path program 17 times [2024-06-21 19:46:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:40,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859219793] [2024-06-21 19:46:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:40,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859219793] [2024-06-21 19:46:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859219793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:45,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:45,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842688274] [2024-06-21 19:46:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:45,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 274 transitions, 4060 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:47,210 INFO L124 PetriNetUnfolderBase]: 2460/4068 cut-off events. [2024-06-21 19:46:47,210 INFO L125 PetriNetUnfolderBase]: For 529071/529071 co-relation queries the response was YES. [2024-06-21 19:46:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38362 conditions, 4068 events. 2460/4068 cut-off events. For 529071/529071 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24777 event pairs, 933 based on Foata normal form. 10/4078 useless extension candidates. Maximal degree in co-relation 38257. Up to 3712 conditions per place. [2024-06-21 19:46:47,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 69 changer transitions 0/302 dead transitions. [2024-06-21 19:46:47,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 302 transitions, 4826 flow [2024-06-21 19:46:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:46:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:46:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 202 transitions. [2024-06-21 19:46:47,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-21 19:46:47,264 INFO L175 Difference]: Start difference. First operand has 299 places, 274 transitions, 4060 flow. Second operand 14 states and 202 transitions. [2024-06-21 19:46:47,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 302 transitions, 4826 flow [2024-06-21 19:46:48,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 302 transitions, 4611 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-21 19:46:48,152 INFO L231 Difference]: Finished difference. Result has 298 places, 275 transitions, 4028 flow [2024-06-21 19:46:48,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4028, PETRI_PLACES=298, PETRI_TRANSITIONS=275} [2024-06-21 19:46:48,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 19:46:48,153 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 275 transitions, 4028 flow [2024-06-21 19:46:48,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:48,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:48,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:46:48,153 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:48,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1614301602, now seen corresponding path program 18 times [2024-06-21 19:46:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667595823] [2024-06-21 19:46:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:52,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:52,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667595823] [2024-06-21 19:46:52,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667595823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:52,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:52,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088542231] [2024-06-21 19:46:52,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:52,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:52,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:46:52,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 275 transitions, 4028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:52,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:52,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:46:52,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:54,360 INFO L124 PetriNetUnfolderBase]: 2608/4282 cut-off events. [2024-06-21 19:46:54,361 INFO L125 PetriNetUnfolderBase]: For 549147/549147 co-relation queries the response was YES. [2024-06-21 19:46:54,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4282 events. 2608/4282 cut-off events. For 549147/549147 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26126 event pairs, 969 based on Foata normal form. 16/4298 useless extension candidates. Maximal degree in co-relation 40277. Up to 3804 conditions per place. [2024-06-21 19:46:54,415 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 81 changer transitions 0/317 dead transitions. [2024-06-21 19:46:54,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 317 transitions, 5054 flow [2024-06-21 19:46:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:46:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:46:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 215 transitions. [2024-06-21 19:46:54,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37456445993031356 [2024-06-21 19:46:54,416 INFO L175 Difference]: Start difference. First operand has 298 places, 275 transitions, 4028 flow. Second operand 14 states and 215 transitions. [2024-06-21 19:46:54,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 317 transitions, 5054 flow [2024-06-21 19:46:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 317 transitions, 4886 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-21 19:46:55,717 INFO L231 Difference]: Finished difference. Result has 302 places, 282 transitions, 4273 flow [2024-06-21 19:46:55,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4273, PETRI_PLACES=302, PETRI_TRANSITIONS=282} [2024-06-21 19:46:55,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 19:46:55,717 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 282 transitions, 4273 flow [2024-06-21 19:46:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:55,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:55,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:55,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:46:55,718 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -8321622, now seen corresponding path program 19 times [2024-06-21 19:46:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760620033] [2024-06-21 19:46:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:00,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:00,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760620033] [2024-06-21 19:47:00,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760620033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:00,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:00,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:00,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74814821] [2024-06-21 19:47:00,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:00,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:00,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:00,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:00,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 282 transitions, 4273 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:00,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:00,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:00,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:02,170 INFO L124 PetriNetUnfolderBase]: 2759/4515 cut-off events. [2024-06-21 19:47:02,170 INFO L125 PetriNetUnfolderBase]: For 621923/621923 co-relation queries the response was YES. [2024-06-21 19:47:02,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43946 conditions, 4515 events. 2759/4515 cut-off events. For 621923/621923 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 27791 event pairs, 982 based on Foata normal form. 10/4521 useless extension candidates. Maximal degree in co-relation 43837. Up to 3977 conditions per place. [2024-06-21 19:47:02,220 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 70 changer transitions 0/316 dead transitions. [2024-06-21 19:47:02,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 316 transitions, 5386 flow [2024-06-21 19:47:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:47:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:47:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 19:47:02,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858093126385809 [2024-06-21 19:47:02,222 INFO L175 Difference]: Start difference. First operand has 302 places, 282 transitions, 4273 flow. Second operand 11 states and 174 transitions. [2024-06-21 19:47:02,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 316 transitions, 5386 flow [2024-06-21 19:47:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 316 transitions, 5170 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-21 19:47:03,245 INFO L231 Difference]: Finished difference. Result has 305 places, 286 transitions, 4342 flow [2024-06-21 19:47:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4342, PETRI_PLACES=305, PETRI_TRANSITIONS=286} [2024-06-21 19:47:03,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 19:47:03,245 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 286 transitions, 4342 flow [2024-06-21 19:47:03,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:03,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:03,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:47:03,246 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:03,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash -780777856, now seen corresponding path program 20 times [2024-06-21 19:47:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605432692] [2024-06-21 19:47:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:08,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605432692] [2024-06-21 19:47:08,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605432692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:08,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:08,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757709613] [2024-06-21 19:47:08,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:08,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:08,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:08,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 286 transitions, 4342 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:08,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:08,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:08,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:10,329 INFO L124 PetriNetUnfolderBase]: 2754/4510 cut-off events. [2024-06-21 19:47:10,329 INFO L125 PetriNetUnfolderBase]: For 592523/592523 co-relation queries the response was YES. [2024-06-21 19:47:10,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43584 conditions, 4510 events. 2754/4510 cut-off events. For 592523/592523 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27885 event pairs, 1029 based on Foata normal form. 2/4510 useless extension candidates. Maximal degree in co-relation 43473. Up to 4250 conditions per place. [2024-06-21 19:47:10,384 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 20 changer transitions 0/304 dead transitions. [2024-06-21 19:47:10,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 304 transitions, 5204 flow [2024-06-21 19:47:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 19:47:10,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33658536585365856 [2024-06-21 19:47:10,386 INFO L175 Difference]: Start difference. First operand has 305 places, 286 transitions, 4342 flow. Second operand 10 states and 138 transitions. [2024-06-21 19:47:10,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 304 transitions, 5204 flow [2024-06-21 19:47:11,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 304 transitions, 5089 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:11,455 INFO L231 Difference]: Finished difference. Result has 308 places, 288 transitions, 4334 flow [2024-06-21 19:47:11,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4334, PETRI_PLACES=308, PETRI_TRANSITIONS=288} [2024-06-21 19:47:11,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 19:47:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 288 transitions, 4334 flow [2024-06-21 19:47:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:11,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:11,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:47:11,456 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:11,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1306546651, now seen corresponding path program 14 times [2024-06-21 19:47:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323831855] [2024-06-21 19:47:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:16,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:16,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323831855] [2024-06-21 19:47:16,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323831855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:16,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:16,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842005499] [2024-06-21 19:47:16,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:16,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:16,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:17,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:17,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 288 transitions, 4334 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:17,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:17,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:17,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:19,054 INFO L124 PetriNetUnfolderBase]: 2741/4503 cut-off events. [2024-06-21 19:47:19,054 INFO L125 PetriNetUnfolderBase]: For 608541/608541 co-relation queries the response was YES. [2024-06-21 19:47:19,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42982 conditions, 4503 events. 2741/4503 cut-off events. For 608541/608541 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27871 event pairs, 1009 based on Foata normal form. 6/4509 useless extension candidates. Maximal degree in co-relation 42869. Up to 4184 conditions per place. [2024-06-21 19:47:19,111 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 25 changer transitions 0/306 dead transitions. [2024-06-21 19:47:19,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 306 transitions, 5032 flow [2024-06-21 19:47:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 19:47:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-21 19:47:19,112 INFO L175 Difference]: Start difference. First operand has 308 places, 288 transitions, 4334 flow. Second operand 10 states and 142 transitions. [2024-06-21 19:47:19,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 306 transitions, 5032 flow [2024-06-21 19:47:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 306 transitions, 4944 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:20,374 INFO L231 Difference]: Finished difference. Result has 311 places, 288 transitions, 4300 flow [2024-06-21 19:47:20,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4300, PETRI_PLACES=311, PETRI_TRANSITIONS=288} [2024-06-21 19:47:20,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-21 19:47:20,374 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 288 transitions, 4300 flow [2024-06-21 19:47:20,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:20,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:20,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:20,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:47:20,375 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:20,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:20,375 INFO L85 PathProgramCache]: Analyzing trace with hash 349710778, now seen corresponding path program 21 times [2024-06-21 19:47:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:20,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433751] [2024-06-21 19:47:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:24,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433751] [2024-06-21 19:47:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:24,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:24,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784864003] [2024-06-21 19:47:24,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:24,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:24,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:24,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:24,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 288 transitions, 4300 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:24,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:24,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:24,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:26,709 INFO L124 PetriNetUnfolderBase]: 2756/4506 cut-off events. [2024-06-21 19:47:26,709 INFO L125 PetriNetUnfolderBase]: For 620480/620480 co-relation queries the response was YES. [2024-06-21 19:47:26,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43137 conditions, 4506 events. 2756/4506 cut-off events. For 620480/620480 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 27730 event pairs, 1007 based on Foata normal form. 8/4510 useless extension candidates. Maximal degree in co-relation 43023. Up to 3454 conditions per place. [2024-06-21 19:47:26,764 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 229 selfloop transitions, 90 changer transitions 0/324 dead transitions. [2024-06-21 19:47:26,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 324 transitions, 5447 flow [2024-06-21 19:47:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:47:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:47:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-21 19:47:26,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37601626016260165 [2024-06-21 19:47:26,766 INFO L175 Difference]: Start difference. First operand has 311 places, 288 transitions, 4300 flow. Second operand 12 states and 185 transitions. [2024-06-21 19:47:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 324 transitions, 5447 flow [2024-06-21 19:47:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 324 transitions, 5336 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:47:27,773 INFO L231 Difference]: Finished difference. Result has 314 places, 293 transitions, 4580 flow [2024-06-21 19:47:27,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4580, PETRI_PLACES=314, PETRI_TRANSITIONS=293} [2024-06-21 19:47:27,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 19:47:27,774 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 293 transitions, 4580 flow [2024-06-21 19:47:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:27,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:27,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:47:27,774 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:27,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1016799797, now seen corresponding path program 1 times [2024-06-21 19:47:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:27,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223680383] [2024-06-21 19:47:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:34,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223680383] [2024-06-21 19:47:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223680383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:34,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:34,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:47:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407707558] [2024-06-21 19:47:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:47:34,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:47:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:47:34,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:34,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 293 transitions, 4580 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:34,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:34,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:34,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:36,570 INFO L124 PetriNetUnfolderBase]: 2761/4519 cut-off events. [2024-06-21 19:47:36,570 INFO L125 PetriNetUnfolderBase]: For 625116/625116 co-relation queries the response was YES. [2024-06-21 19:47:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44046 conditions, 4519 events. 2761/4519 cut-off events. For 625116/625116 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27922 event pairs, 1038 based on Foata normal form. 1/4520 useless extension candidates. Maximal degree in co-relation 43929. Up to 4295 conditions per place. [2024-06-21 19:47:36,620 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 269 selfloop transitions, 33 changer transitions 0/307 dead transitions. [2024-06-21 19:47:36,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 307 transitions, 5428 flow [2024-06-21 19:47:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 19:47:36,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-21 19:47:36,621 INFO L175 Difference]: Start difference. First operand has 314 places, 293 transitions, 4580 flow. Second operand 10 states and 140 transitions. [2024-06-21 19:47:36,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 307 transitions, 5428 flow [2024-06-21 19:47:37,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 307 transitions, 5081 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:37,942 INFO L231 Difference]: Finished difference. Result has 316 places, 296 transitions, 4366 flow [2024-06-21 19:47:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=316, PETRI_TRANSITIONS=296} [2024-06-21 19:47:37,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-21 19:47:37,943 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 296 transitions, 4366 flow [2024-06-21 19:47:37,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:37,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:37,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:47:37,943 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:37,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1017128087, now seen corresponding path program 2 times [2024-06-21 19:47:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:37,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70889729] [2024-06-21 19:47:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:45,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70889729] [2024-06-21 19:47:45,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70889729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:45,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:45,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:47:45,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659832864] [2024-06-21 19:47:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:47:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:47:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:47:45,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:45,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 296 transitions, 4366 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:45,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:45,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:45,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:46,909 INFO L124 PetriNetUnfolderBase]: 2758/4531 cut-off events. [2024-06-21 19:47:46,909 INFO L125 PetriNetUnfolderBase]: For 641799/641799 co-relation queries the response was YES. [2024-06-21 19:47:46,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43302 conditions, 4531 events. 2758/4531 cut-off events. For 641799/641799 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28082 event pairs, 1019 based on Foata normal form. 1/4532 useless extension candidates. Maximal degree in co-relation 43184. Up to 4292 conditions per place. [2024-06-21 19:47:46,959 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 268 selfloop transitions, 33 changer transitions 0/306 dead transitions. [2024-06-21 19:47:46,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 306 transitions, 4992 flow [2024-06-21 19:47:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 19:47:46,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-21 19:47:46,961 INFO L175 Difference]: Start difference. First operand has 316 places, 296 transitions, 4366 flow. Second operand 9 states and 132 transitions. [2024-06-21 19:47:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 306 transitions, 4992 flow [2024-06-21 19:47:48,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 306 transitions, 4907 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:48,351 INFO L231 Difference]: Finished difference. Result has 317 places, 296 transitions, 4355 flow [2024-06-21 19:47:48,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4281, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4355, PETRI_PLACES=317, PETRI_TRANSITIONS=296} [2024-06-21 19:47:48,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 19:47:48,352 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 296 transitions, 4355 flow [2024-06-21 19:47:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:48,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:48,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:48,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:47:48,352 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:48,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:48,353 INFO L85 PathProgramCache]: Analyzing trace with hash 122968710, now seen corresponding path program 3 times [2024-06-21 19:47:48,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:48,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703201060] [2024-06-21 19:47:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:48,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703201060] [2024-06-21 19:47:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703201060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:54,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:54,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:47:54,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188615748] [2024-06-21 19:47:54,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:54,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:47:54,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:47:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:47:54,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:47:54,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 296 transitions, 4355 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:54,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:54,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:47:54,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:56,370 INFO L124 PetriNetUnfolderBase]: 2740/4489 cut-off events. [2024-06-21 19:47:56,370 INFO L125 PetriNetUnfolderBase]: For 624096/624096 co-relation queries the response was YES. [2024-06-21 19:47:56,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42394 conditions, 4489 events. 2740/4489 cut-off events. For 624096/624096 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27684 event pairs, 1038 based on Foata normal form. 8/4497 useless extension candidates. Maximal degree in co-relation 42276. Up to 4129 conditions per place. [2024-06-21 19:47:56,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 68 changer transitions 0/320 dead transitions. [2024-06-21 19:47:56,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 320 transitions, 5125 flow [2024-06-21 19:47:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:47:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:47:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-21 19:47:56,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-21 19:47:56,525 INFO L175 Difference]: Start difference. First operand has 317 places, 296 transitions, 4355 flow. Second operand 11 states and 170 transitions. [2024-06-21 19:47:56,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 320 transitions, 5125 flow [2024-06-21 19:47:57,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 320 transitions, 5040 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 19:47:57,902 INFO L231 Difference]: Finished difference. Result has 319 places, 296 transitions, 4415 flow [2024-06-21 19:47:57,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4415, PETRI_PLACES=319, PETRI_TRANSITIONS=296} [2024-06-21 19:47:57,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 19:47:57,903 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 296 transitions, 4415 flow [2024-06-21 19:47:57,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:57,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:57,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:47:57,903 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:57,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash -645527057, now seen corresponding path program 3 times [2024-06-21 19:47:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019810408] [2024-06-21 19:47:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019810408] [2024-06-21 19:48:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019810408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:48:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804398268] [2024-06-21 19:48:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:48:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:48:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:48:03,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:03,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 296 transitions, 4415 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:03,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:03,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:03,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:05,492 INFO L124 PetriNetUnfolderBase]: 2737/4503 cut-off events. [2024-06-21 19:48:05,492 INFO L125 PetriNetUnfolderBase]: For 627532/627532 co-relation queries the response was YES. [2024-06-21 19:48:05,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42632 conditions, 4503 events. 2737/4503 cut-off events. For 627532/627532 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27928 event pairs, 1008 based on Foata normal form. 1/4504 useless extension candidates. Maximal degree in co-relation 42513. Up to 4144 conditions per place. [2024-06-21 19:48:05,547 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 93 changer transitions 0/315 dead transitions. [2024-06-21 19:48:05,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 315 transitions, 5083 flow [2024-06-21 19:48:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:48:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:48:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-21 19:48:05,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-21 19:48:05,551 INFO L175 Difference]: Start difference. First operand has 319 places, 296 transitions, 4415 flow. Second operand 11 states and 170 transitions. [2024-06-21 19:48:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 315 transitions, 5083 flow [2024-06-21 19:48:07,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 315 transitions, 4926 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:48:07,020 INFO L231 Difference]: Finished difference. Result has 321 places, 296 transitions, 4457 flow [2024-06-21 19:48:07,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4457, PETRI_PLACES=321, PETRI_TRANSITIONS=296} [2024-06-21 19:48:07,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 19:48:07,021 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 296 transitions, 4457 flow [2024-06-21 19:48:07,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:07,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:07,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:48:07,022 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:07,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:07,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1844735012, now seen corresponding path program 4 times [2024-06-21 19:48:07,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:07,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128868225] [2024-06-21 19:48:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:07,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128868225] [2024-06-21 19:48:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128868225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:12,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:48:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328741346] [2024-06-21 19:48:12,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:12,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:48:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:48:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:48:12,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 296 transitions, 4457 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:12,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:12,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:15,341 INFO L124 PetriNetUnfolderBase]: 2865/4737 cut-off events. [2024-06-21 19:48:15,341 INFO L125 PetriNetUnfolderBase]: For 763494/763494 co-relation queries the response was YES. [2024-06-21 19:48:15,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44113 conditions, 4737 events. 2865/4737 cut-off events. For 763494/763494 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29900 event pairs, 1022 based on Foata normal form. 36/4773 useless extension candidates. Maximal degree in co-relation 43993. Up to 3935 conditions per place. [2024-06-21 19:48:15,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 75 changer transitions 11/337 dead transitions. [2024-06-21 19:48:15,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 337 transitions, 5467 flow [2024-06-21 19:48:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:48:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:48:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-06-21 19:48:15,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367595818815331 [2024-06-21 19:48:15,402 INFO L175 Difference]: Start difference. First operand has 321 places, 296 transitions, 4457 flow. Second operand 14 states and 211 transitions. [2024-06-21 19:48:15,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 337 transitions, 5467 flow [2024-06-21 19:48:16,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 337 transitions, 5170 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 19:48:16,841 INFO L231 Difference]: Finished difference. Result has 324 places, 294 transitions, 4330 flow [2024-06-21 19:48:16,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4330, PETRI_PLACES=324, PETRI_TRANSITIONS=294} [2024-06-21 19:48:16,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 19:48:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 294 transitions, 4330 flow [2024-06-21 19:48:16,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:16,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:16,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:48:16,842 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:16,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1016799394, now seen corresponding path program 5 times [2024-06-21 19:48:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:16,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013934823] [2024-06-21 19:48:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013934823] [2024-06-21 19:48:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013934823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:23,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:23,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:48:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981716049] [2024-06-21 19:48:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:23,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:48:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:48:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:48:23,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:23,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 294 transitions, 4330 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:23,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:23,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:23,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:24,830 INFO L124 PetriNetUnfolderBase]: 2708/4446 cut-off events. [2024-06-21 19:48:24,830 INFO L125 PetriNetUnfolderBase]: For 621871/621871 co-relation queries the response was YES. [2024-06-21 19:48:24,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41892 conditions, 4446 events. 2708/4446 cut-off events. For 621871/621871 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27472 event pairs, 1039 based on Foata normal form. 8/4454 useless extension candidates. Maximal degree in co-relation 41771. Up to 4198 conditions per place. [2024-06-21 19:48:24,887 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-21 19:48:24,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 308 transitions, 5004 flow [2024-06-21 19:48:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 19:48:24,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33902439024390246 [2024-06-21 19:48:24,889 INFO L175 Difference]: Start difference. First operand has 324 places, 294 transitions, 4330 flow. Second operand 10 states and 139 transitions. [2024-06-21 19:48:24,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 308 transitions, 5004 flow [2024-06-21 19:48:26,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 308 transitions, 4808 flow, removed 20 selfloop flow, removed 15 redundant places. [2024-06-21 19:48:26,483 INFO L231 Difference]: Finished difference. Result has 319 places, 294 transitions, 4187 flow [2024-06-21 19:48:26,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4187, PETRI_PLACES=319, PETRI_TRANSITIONS=294} [2024-06-21 19:48:26,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 19:48:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 294 transitions, 4187 flow [2024-06-21 19:48:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:26,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:26,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:26,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:48:26,484 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:26,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1917890202, now seen corresponding path program 6 times [2024-06-21 19:48:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281400760] [2024-06-21 19:48:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:31,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281400760] [2024-06-21 19:48:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281400760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:31,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:31,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:48:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952618646] [2024-06-21 19:48:31,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:48:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:48:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:48:31,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:31,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 294 transitions, 4187 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:31,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:31,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:31,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:33,905 INFO L124 PetriNetUnfolderBase]: 2743/4503 cut-off events. [2024-06-21 19:48:33,905 INFO L125 PetriNetUnfolderBase]: For 626023/626023 co-relation queries the response was YES. [2024-06-21 19:48:33,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41805 conditions, 4503 events. 2743/4503 cut-off events. For 626023/626023 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27850 event pairs, 1023 based on Foata normal form. 8/4511 useless extension candidates. Maximal degree in co-relation 41685. Up to 3878 conditions per place. [2024-06-21 19:48:33,961 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 71 changer transitions 0/326 dead transitions. [2024-06-21 19:48:33,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 326 transitions, 5027 flow [2024-06-21 19:48:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:48:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:48:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2024-06-21 19:48:33,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-21 19:48:33,962 INFO L175 Difference]: Start difference. First operand has 319 places, 294 transitions, 4187 flow. Second operand 14 states and 203 transitions. [2024-06-21 19:48:33,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 326 transitions, 5027 flow [2024-06-21 19:48:35,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 326 transitions, 4986 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:48:35,754 INFO L231 Difference]: Finished difference. Result has 326 places, 296 transitions, 4377 flow [2024-06-21 19:48:35,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4377, PETRI_PLACES=326, PETRI_TRANSITIONS=296} [2024-06-21 19:48:35,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 19:48:35,755 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 296 transitions, 4377 flow [2024-06-21 19:48:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:35,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:35,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:48:35,755 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:35,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash 649391770, now seen corresponding path program 7 times [2024-06-21 19:48:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229039103] [2024-06-21 19:48:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:41,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:41,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229039103] [2024-06-21 19:48:41,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229039103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:41,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:41,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:48:41,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381728435] [2024-06-21 19:48:41,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:41,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:48:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:48:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:48:41,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:41,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 296 transitions, 4377 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:41,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:41,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:41,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:43,814 INFO L124 PetriNetUnfolderBase]: 2763/4535 cut-off events. [2024-06-21 19:48:43,814 INFO L125 PetriNetUnfolderBase]: For 635980/635980 co-relation queries the response was YES. [2024-06-21 19:48:43,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42629 conditions, 4535 events. 2763/4535 cut-off events. For 635980/635980 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28069 event pairs, 958 based on Foata normal form. 6/4539 useless extension candidates. Maximal degree in co-relation 42507. Up to 3527 conditions per place. [2024-06-21 19:48:43,869 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2024-06-21 19:48:43,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 333 transitions, 5457 flow [2024-06-21 19:48:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:48:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:48:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2024-06-21 19:48:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-21 19:48:43,870 INFO L175 Difference]: Start difference. First operand has 326 places, 296 transitions, 4377 flow. Second operand 14 states and 203 transitions. [2024-06-21 19:48:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 333 transitions, 5457 flow [2024-06-21 19:48:45,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 333 transitions, 5301 flow, removed 18 selfloop flow, removed 13 redundant places. [2024-06-21 19:48:45,672 INFO L231 Difference]: Finished difference. Result has 328 places, 299 transitions, 4501 flow [2024-06-21 19:48:45,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4501, PETRI_PLACES=328, PETRI_TRANSITIONS=299} [2024-06-21 19:48:45,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 19:48:45,675 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 299 transitions, 4501 flow [2024-06-21 19:48:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:45,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:48:45,676 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:45,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 643677850, now seen corresponding path program 8 times [2024-06-21 19:48:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073984094] [2024-06-21 19:48:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:50,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073984094] [2024-06-21 19:48:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073984094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:50,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:48:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238323165] [2024-06-21 19:48:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:48:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:50,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:48:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:48:50,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:48:50,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 299 transitions, 4501 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:50,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:50,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:48:50,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:53,469 INFO L124 PetriNetUnfolderBase]: 2750/4518 cut-off events. [2024-06-21 19:48:53,469 INFO L125 PetriNetUnfolderBase]: For 602469/602469 co-relation queries the response was YES. [2024-06-21 19:48:53,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42031 conditions, 4518 events. 2750/4518 cut-off events. For 602469/602469 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27983 event pairs, 898 based on Foata normal form. 6/4520 useless extension candidates. Maximal degree in co-relation 41909. Up to 3521 conditions per place. [2024-06-21 19:48:53,525 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 86 changer transitions 0/334 dead transitions. [2024-06-21 19:48:53,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 334 transitions, 5423 flow [2024-06-21 19:48:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:48:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:48:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 204 transitions. [2024-06-21 19:48:53,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-21 19:48:53,526 INFO L175 Difference]: Start difference. First operand has 328 places, 299 transitions, 4501 flow. Second operand 14 states and 204 transitions. [2024-06-21 19:48:53,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 334 transitions, 5423 flow [2024-06-21 19:48:55,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 334 transitions, 5292 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 19:48:55,218 INFO L231 Difference]: Finished difference. Result has 332 places, 299 transitions, 4546 flow [2024-06-21 19:48:55,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4370, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4546, PETRI_PLACES=332, PETRI_TRANSITIONS=299} [2024-06-21 19:48:55,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 19:48:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 299 transitions, 4546 flow [2024-06-21 19:48:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:55,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:55,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:48:55,220 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:55,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 722548153, now seen corresponding path program 1 times [2024-06-21 19:48:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:55,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702758378] [2024-06-21 19:48:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:01,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702758378] [2024-06-21 19:49:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702758378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:01,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:01,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:49:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805667926] [2024-06-21 19:49:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:49:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:49:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:49:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:01,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 299 transitions, 4546 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:01,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:01,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:01,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:03,138 INFO L124 PetriNetUnfolderBase]: 2798/4606 cut-off events. [2024-06-21 19:49:03,138 INFO L125 PetriNetUnfolderBase]: For 661512/661512 co-relation queries the response was YES. [2024-06-21 19:49:03,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42642 conditions, 4606 events. 2798/4606 cut-off events. For 661512/661512 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28799 event pairs, 965 based on Foata normal form. 18/4624 useless extension candidates. Maximal degree in co-relation 42519. Up to 4104 conditions per place. [2024-06-21 19:49:03,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 30 changer transitions 15/325 dead transitions. [2024-06-21 19:49:03,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 325 transitions, 5387 flow [2024-06-21 19:49:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:49:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:49:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 169 transitions. [2024-06-21 19:49:03,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434959349593496 [2024-06-21 19:49:03,194 INFO L175 Difference]: Start difference. First operand has 332 places, 299 transitions, 4546 flow. Second operand 12 states and 169 transitions. [2024-06-21 19:49:03,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 325 transitions, 5387 flow [2024-06-21 19:49:04,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 325 transitions, 5223 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 19:49:04,872 INFO L231 Difference]: Finished difference. Result has 332 places, 290 transitions, 4359 flow [2024-06-21 19:49:04,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4359, PETRI_PLACES=332, PETRI_TRANSITIONS=290} [2024-06-21 19:49:04,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 19:49:04,872 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 290 transitions, 4359 flow [2024-06-21 19:49:04,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:04,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:04,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:49:04,873 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:04,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash 760362117, now seen corresponding path program 1 times [2024-06-21 19:49:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:04,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574249213] [2024-06-21 19:49:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:12,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574249213] [2024-06-21 19:49:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574249213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:12,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:12,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:49:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389343528] [2024-06-21 19:49:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:12,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:49:12,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:49:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:49:12,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:12,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 290 transitions, 4359 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:12,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:12,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:12,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:14,168 INFO L124 PetriNetUnfolderBase]: 2682/4343 cut-off events. [2024-06-21 19:49:14,169 INFO L125 PetriNetUnfolderBase]: For 620951/620951 co-relation queries the response was YES. [2024-06-21 19:49:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40749 conditions, 4343 events. 2682/4343 cut-off events. For 620951/620951 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26513 event pairs, 908 based on Foata normal form. 6/4340 useless extension candidates. Maximal degree in co-relation 40626. Up to 3910 conditions per place. [2024-06-21 19:49:14,221 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 33 changer transitions 15/322 dead transitions. [2024-06-21 19:49:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 322 transitions, 5299 flow [2024-06-21 19:49:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:49:14,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 19:49:14,222 INFO L175 Difference]: Start difference. First operand has 332 places, 290 transitions, 4359 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:49:14,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 322 transitions, 5299 flow [2024-06-21 19:49:15,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 322 transitions, 5079 flow, removed 7 selfloop flow, removed 19 redundant places. [2024-06-21 19:49:15,647 INFO L231 Difference]: Finished difference. Result has 317 places, 285 transitions, 4144 flow [2024-06-21 19:49:15,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4144, PETRI_PLACES=317, PETRI_TRANSITIONS=285} [2024-06-21 19:49:15,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 19:49:15,648 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 285 transitions, 4144 flow [2024-06-21 19:49:15,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:15,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:15,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:49:15,648 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:15,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash 151068707, now seen corresponding path program 2 times [2024-06-21 19:49:15,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:15,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081181591] [2024-06-21 19:49:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:23,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:23,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081181591] [2024-06-21 19:49:23,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081181591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:23,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:23,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:49:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658880240] [2024-06-21 19:49:23,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:23,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:49:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:49:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:49:23,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:23,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 285 transitions, 4144 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:23,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:23,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:25,673 INFO L124 PetriNetUnfolderBase]: 2579/4171 cut-off events. [2024-06-21 19:49:25,673 INFO L125 PetriNetUnfolderBase]: For 582937/582937 co-relation queries the response was YES. [2024-06-21 19:49:25,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38884 conditions, 4171 events. 2579/4171 cut-off events. For 582937/582937 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25199 event pairs, 900 based on Foata normal form. 6/4175 useless extension candidates. Maximal degree in co-relation 38763. Up to 3952 conditions per place. [2024-06-21 19:49:25,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 23 changer transitions 18/308 dead transitions. [2024-06-21 19:49:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 308 transitions, 4826 flow [2024-06-21 19:49:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 19:49:25,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36097560975609755 [2024-06-21 19:49:25,720 INFO L175 Difference]: Start difference. First operand has 317 places, 285 transitions, 4144 flow. Second operand 10 states and 148 transitions. [2024-06-21 19:49:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 308 transitions, 4826 flow [2024-06-21 19:49:26,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 308 transitions, 4696 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-21 19:49:26,963 INFO L231 Difference]: Finished difference. Result has 307 places, 278 transitions, 3979 flow [2024-06-21 19:49:26,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3979, PETRI_PLACES=307, PETRI_TRANSITIONS=278} [2024-06-21 19:49:26,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 19:49:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 278 transitions, 3979 flow [2024-06-21 19:49:26,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:26,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:49:26,964 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1968622177, now seen corresponding path program 1 times [2024-06-21 19:49:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878350133] [2024-06-21 19:49:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878350133] [2024-06-21 19:49:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878350133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:33,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:33,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:49:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381900380] [2024-06-21 19:49:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:49:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:49:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:49:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:33,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 278 transitions, 3979 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:33,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:33,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:35,880 INFO L124 PetriNetUnfolderBase]: 2754/4470 cut-off events. [2024-06-21 19:49:35,881 INFO L125 PetriNetUnfolderBase]: For 689070/689070 co-relation queries the response was YES. [2024-06-21 19:49:35,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43336 conditions, 4470 events. 2754/4470 cut-off events. For 689070/689070 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27326 event pairs, 542 based on Foata normal form. 6/4476 useless extension candidates. Maximal degree in co-relation 43218. Up to 3208 conditions per place. [2024-06-21 19:49:35,937 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 275 selfloop transitions, 55 changer transitions 0/335 dead transitions. [2024-06-21 19:49:35,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 335 transitions, 5531 flow [2024-06-21 19:49:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:49:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:49:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 215 transitions. [2024-06-21 19:49:35,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37456445993031356 [2024-06-21 19:49:35,938 INFO L175 Difference]: Start difference. First operand has 307 places, 278 transitions, 3979 flow. Second operand 14 states and 215 transitions. [2024-06-21 19:49:35,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 335 transitions, 5531 flow [2024-06-21 19:49:37,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 335 transitions, 5389 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-21 19:49:37,132 INFO L231 Difference]: Finished difference. Result has 303 places, 279 transitions, 4013 flow [2024-06-21 19:49:37,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4013, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2024-06-21 19:49:37,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 19:49:37,133 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 4013 flow [2024-06-21 19:49:37,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:37,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:37,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:37,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:49:37,133 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:37,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:37,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1960290307, now seen corresponding path program 2 times [2024-06-21 19:49:37,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:37,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437019321] [2024-06-21 19:49:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:37,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437019321] [2024-06-21 19:49:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437019321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:49:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359312502] [2024-06-21 19:49:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:43,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:49:43,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:49:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:49:43,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:43,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 4013 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:43,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:43,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:45,339 INFO L124 PetriNetUnfolderBase]: 2888/4714 cut-off events. [2024-06-21 19:49:45,339 INFO L125 PetriNetUnfolderBase]: For 762915/762915 co-relation queries the response was YES. [2024-06-21 19:49:45,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46878 conditions, 4714 events. 2888/4714 cut-off events. For 762915/762915 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29363 event pairs, 537 based on Foata normal form. 6/4720 useless extension candidates. Maximal degree in co-relation 46762. Up to 3208 conditions per place. [2024-06-21 19:49:45,392 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 282 selfloop transitions, 38 changer transitions 0/325 dead transitions. [2024-06-21 19:49:45,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 325 transitions, 5539 flow [2024-06-21 19:49:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:49:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:49:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 19:49:45,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-21 19:49:45,394 INFO L175 Difference]: Start difference. First operand has 303 places, 279 transitions, 4013 flow. Second operand 11 states and 179 transitions. [2024-06-21 19:49:45,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 325 transitions, 5539 flow [2024-06-21 19:49:46,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 325 transitions, 5404 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 19:49:46,688 INFO L231 Difference]: Finished difference. Result has 304 places, 280 transitions, 4006 flow [2024-06-21 19:49:46,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4006, PETRI_PLACES=304, PETRI_TRANSITIONS=280} [2024-06-21 19:49:46,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 19:49:46,689 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 280 transitions, 4006 flow [2024-06-21 19:49:46,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:46,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:46,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:46,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:49:46,689 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:46,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:46,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2138703435, now seen corresponding path program 3 times [2024-06-21 19:49:46,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:46,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548746660] [2024-06-21 19:49:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:46,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548746660] [2024-06-21 19:49:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548746660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:53,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:53,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:49:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278672175] [2024-06-21 19:49:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:53,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:49:53,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:49:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:49:54,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:49:54,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 280 transitions, 4006 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:54,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:49:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:55,876 INFO L124 PetriNetUnfolderBase]: 2875/4685 cut-off events. [2024-06-21 19:49:55,877 INFO L125 PetriNetUnfolderBase]: For 767698/767698 co-relation queries the response was YES. [2024-06-21 19:49:55,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46281 conditions, 4685 events. 2875/4685 cut-off events. For 767698/767698 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29053 event pairs, 613 based on Foata normal form. 6/4691 useless extension candidates. Maximal degree in co-relation 46164. Up to 3208 conditions per place. [2024-06-21 19:49:55,941 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 276 selfloop transitions, 41 changer transitions 0/322 dead transitions. [2024-06-21 19:49:55,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 322 transitions, 5302 flow [2024-06-21 19:49:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:49:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:49:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 19:49:55,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-21 19:49:55,942 INFO L175 Difference]: Start difference. First operand has 304 places, 280 transitions, 4006 flow. Second operand 11 states and 175 transitions. [2024-06-21 19:49:55,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 322 transitions, 5302 flow [2024-06-21 19:49:57,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 322 transitions, 5186 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 19:49:57,210 INFO L231 Difference]: Finished difference. Result has 306 places, 281 transitions, 4026 flow [2024-06-21 19:49:57,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4026, PETRI_PLACES=306, PETRI_TRANSITIONS=281} [2024-06-21 19:49:57,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 19:49:57,210 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 281 transitions, 4026 flow [2024-06-21 19:49:57,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:57,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:57,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:57,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:49:57,210 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:57,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -641102213, now seen corresponding path program 4 times [2024-06-21 19:49:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:57,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863391399] [2024-06-21 19:49:57,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:57,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:01,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:01,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863391399] [2024-06-21 19:50:01,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863391399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:01,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:50:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029881813] [2024-06-21 19:50:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:50:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:50:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:50:01,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:50:01,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 281 transitions, 4026 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:01,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:01,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:50:01,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:03,416 INFO L124 PetriNetUnfolderBase]: 3153/5191 cut-off events. [2024-06-21 19:50:03,417 INFO L125 PetriNetUnfolderBase]: For 997037/997037 co-relation queries the response was YES. [2024-06-21 19:50:03,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52654 conditions, 5191 events. 3153/5191 cut-off events. For 997037/997037 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33477 event pairs, 1055 based on Foata normal form. 24/5215 useless extension candidates. Maximal degree in co-relation 52536. Up to 3280 conditions per place. [2024-06-21 19:50:03,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 112 changer transitions 7/325 dead transitions. [2024-06-21 19:50:03,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 325 transitions, 5552 flow [2024-06-21 19:50:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:50:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:50:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 19:50:03,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 19:50:03,483 INFO L175 Difference]: Start difference. First operand has 306 places, 281 transitions, 4026 flow. Second operand 12 states and 195 transitions. [2024-06-21 19:50:03,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 325 transitions, 5552 flow [2024-06-21 19:50:05,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 325 transitions, 5431 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:05,040 INFO L231 Difference]: Finished difference. Result has 310 places, 276 transitions, 4085 flow [2024-06-21 19:50:05,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4085, PETRI_PLACES=310, PETRI_TRANSITIONS=276} [2024-06-21 19:50:05,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 19:50:05,041 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 276 transitions, 4085 flow [2024-06-21 19:50:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:05,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:05,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:50:05,041 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:05,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1985308327, now seen corresponding path program 3 times [2024-06-21 19:50:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020238863] [2024-06-21 19:50:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020238863] [2024-06-21 19:50:09,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020238863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:09,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:09,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:50:09,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043898657] [2024-06-21 19:50:09,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:09,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:50:09,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:50:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:50:09,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:50:09,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 276 transitions, 4085 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:09,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:09,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:50:09,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:11,666 INFO L124 PetriNetUnfolderBase]: 2988/4902 cut-off events. [2024-06-21 19:50:11,666 INFO L125 PetriNetUnfolderBase]: For 875663/875663 co-relation queries the response was YES. [2024-06-21 19:50:11,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49234 conditions, 4902 events. 2988/4902 cut-off events. For 875663/875663 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31258 event pairs, 842 based on Foata normal form. 6/4908 useless extension candidates. Maximal degree in co-relation 49115. Up to 2932 conditions per place. [2024-06-21 19:50:11,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 119 changer transitions 9/310 dead transitions. [2024-06-21 19:50:11,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 310 transitions, 5233 flow [2024-06-21 19:50:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:50:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:50:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 19:50:11,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-21 19:50:11,728 INFO L175 Difference]: Start difference. First operand has 310 places, 276 transitions, 4085 flow. Second operand 11 states and 179 transitions. [2024-06-21 19:50:11,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 310 transitions, 5233 flow [2024-06-21 19:50:13,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 310 transitions, 4987 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 19:50:13,462 INFO L231 Difference]: Finished difference. Result has 308 places, 271 transitions, 4036 flow [2024-06-21 19:50:13,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4036, PETRI_PLACES=308, PETRI_TRANSITIONS=271} [2024-06-21 19:50:13,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 19:50:13,463 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 271 transitions, 4036 flow [2024-06-21 19:50:13,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:13,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:13,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:50:13,463 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:13,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -373721415, now seen corresponding path program 5 times [2024-06-21 19:50:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:13,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962591806] [2024-06-21 19:50:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962591806] [2024-06-21 19:50:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962591806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:19,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:50:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112034406] [2024-06-21 19:50:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:50:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:50:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:50:19,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:50:19,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 271 transitions, 4036 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:19,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:19,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:50:19,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:21,802 INFO L124 PetriNetUnfolderBase]: 2803/4583 cut-off events. [2024-06-21 19:50:21,802 INFO L125 PetriNetUnfolderBase]: For 784121/784121 co-relation queries the response was YES. [2024-06-21 19:50:21,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46501 conditions, 4583 events. 2803/4583 cut-off events. For 784121/784121 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28509 event pairs, 564 based on Foata normal form. 6/4589 useless extension candidates. Maximal degree in co-relation 46383. Up to 3664 conditions per place. [2024-06-21 19:50:21,851 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 42 changer transitions 0/314 dead transitions. [2024-06-21 19:50:21,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 314 transitions, 5320 flow [2024-06-21 19:50:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:50:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:50:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 192 transitions. [2024-06-21 19:50:21,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602251407129456 [2024-06-21 19:50:21,853 INFO L175 Difference]: Start difference. First operand has 308 places, 271 transitions, 4036 flow. Second operand 13 states and 192 transitions. [2024-06-21 19:50:21,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 314 transitions, 5320 flow [2024-06-21 19:50:23,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 314 transitions, 5060 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-21 19:50:23,223 INFO L231 Difference]: Finished difference. Result has 304 places, 272 transitions, 3928 flow [2024-06-21 19:50:23,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3928, PETRI_PLACES=304, PETRI_TRANSITIONS=272} [2024-06-21 19:50:23,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 19:50:23,223 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 272 transitions, 3928 flow [2024-06-21 19:50:23,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:23,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:23,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:50:23,223 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:23,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -679223733, now seen corresponding path program 6 times [2024-06-21 19:50:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:23,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270221861] [2024-06-21 19:50:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:29,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:29,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270221861] [2024-06-21 19:50:29,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270221861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:29,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:29,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:50:29,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240554444] [2024-06-21 19:50:29,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:29,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:50:29,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:50:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:50:29,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:50:29,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 272 transitions, 3928 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:29,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:29,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:50:29,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:31,196 INFO L124 PetriNetUnfolderBase]: 2790/4560 cut-off events. [2024-06-21 19:50:31,196 INFO L125 PetriNetUnfolderBase]: For 728354/728354 co-relation queries the response was YES. [2024-06-21 19:50:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44942 conditions, 4560 events. 2790/4560 cut-off events. For 728354/728354 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28187 event pairs, 578 based on Foata normal form. 6/4566 useless extension candidates. Maximal degree in co-relation 44826. Up to 3664 conditions per place. [2024-06-21 19:50:31,254 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 42 changer transitions 0/311 dead transitions. [2024-06-21 19:50:31,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 311 transitions, 4982 flow [2024-06-21 19:50:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:50:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:50:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-06-21 19:50:31,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 19:50:31,255 INFO L175 Difference]: Start difference. First operand has 304 places, 272 transitions, 3928 flow. Second operand 12 states and 180 transitions. [2024-06-21 19:50:31,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 311 transitions, 4982 flow [2024-06-21 19:50:32,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 311 transitions, 4858 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 19:50:32,499 INFO L231 Difference]: Finished difference. Result has 306 places, 273 transitions, 3942 flow [2024-06-21 19:50:32,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3804, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3942, PETRI_PLACES=306, PETRI_TRANSITIONS=273} [2024-06-21 19:50:32,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 19:50:32,499 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 273 transitions, 3942 flow [2024-06-21 19:50:32,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:32,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:32,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:50:32,499 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash -990549469, now seen corresponding path program 4 times [2024-06-21 19:50:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349333732] [2024-06-21 19:50:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349333732] [2024-06-21 19:50:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349333732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:50:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397935349] [2024-06-21 19:50:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:50:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:50:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:50:39,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 19:50:39,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 273 transitions, 3942 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:39,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:39,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 19:50:39,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:40,874 INFO L124 PetriNetUnfolderBase]: 2777/4547 cut-off events. [2024-06-21 19:50:40,874 INFO L125 PetriNetUnfolderBase]: For 725552/725552 co-relation queries the response was YES. [2024-06-21 19:50:40,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44437 conditions, 4547 events. 2777/4547 cut-off events. For 725552/725552 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28446 event pairs, 713 based on Foata normal form. 6/4553 useless extension candidates. Maximal degree in co-relation 44320. Up to 4162 conditions per place. [2024-06-21 19:50:40,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 36 changer transitions 0/297 dead transitions. [2024-06-21 19:50:40,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 297 transitions, 4604 flow [2024-06-21 19:50:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 19:50:40,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-21 19:50:40,947 INFO L175 Difference]: Start difference. First operand has 306 places, 273 transitions, 3942 flow. Second operand 10 states and 149 transitions. [2024-06-21 19:50:40,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 297 transitions, 4604 flow [2024-06-21 19:50:42,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 297 transitions, 4477 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:50:42,289 INFO L231 Difference]: Finished difference. Result has 307 places, 273 transitions, 3892 flow [2024-06-21 19:50:42,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3892, PETRI_PLACES=307, PETRI_TRANSITIONS=273} [2024-06-21 19:50:42,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 19:50:42,290 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 273 transitions, 3892 flow [2024-06-21 19:50:42,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:42,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:42,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:42,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:50:42,290 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:42,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 685793215, now seen corresponding path program 5 times [2024-06-21 19:50:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437338689] [2024-06-21 19:50:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15