./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe003_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe003_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe003_tso.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:34:44,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:34:44,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:34:44,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:34:44,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:34:44,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:34:44,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:34:44,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:34:44,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:34:44,954 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:34:44,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:34:44,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:34:44,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:34:44,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:34:44,957 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:34:44,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:34:44,957 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:34:44,958 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:34:44,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:34:44,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:34:44,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:34:44,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:34:44,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:34:44,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:34:44,968 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:34:44,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:34:44,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:34:44,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:34:44,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:34:44,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:34:44,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:34:44,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:34:44,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:44,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:34:44,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:34:44,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:34:44,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:34:44,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:34:44,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:34:45,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:34:45,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:34:45,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:34:45,229 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:34:45,229 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:34:45,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe003_tso.yml/witness.yml [2024-05-12 10:34:45,397 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:34:45,398 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:34:45,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-05-12 10:34:46,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:34:46,594 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:34:46,594 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-05-12 10:34:46,604 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8c77780/ac4643872f35473fabf05013b036e8a2/FLAG3faa613a3 [2024-05-12 10:34:46,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8c77780/ac4643872f35473fabf05013b036e8a2 [2024-05-12 10:34:46,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:34:46,616 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:34:46,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:46,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:34:46,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:34:46,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:45" (1/2) ... [2024-05-12 10:34:46,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbd31bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:46, skipping insertion in model container [2024-05-12 10:34:46,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:45" (1/2) ... [2024-05-12 10:34:46,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59422f63 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:46, skipping insertion in model container [2024-05-12 10:34:46,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:46" (2/2) ... [2024-05-12 10:34:46,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbd31bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:46, skipping insertion in model container [2024-05-12 10:34:46,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:46" (2/2) ... [2024-05-12 10:34:46,625 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:34:46,772 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:34:46,773 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:46,773 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:46,774 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:46,774 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:34:46,774 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-05-12 10:34:46,824 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:34:47,046 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i[945,958] [2024-05-12 10:34:47,186 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:47,195 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:34:47,228 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:34:47,362 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:47,404 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:34:47,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47 WrapperNode [2024-05-12 10:34:47,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:47,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:47,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:34:47,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:34:47,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,476 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:34:47,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:47,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:34:47,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:34:47,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:34:47,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,505 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,527 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:34:47,529 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:34:47,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:34:47,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:34:47,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:34:47,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (1/1) ... [2024-05-12 10:34:47,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:47,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:34:47,626 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) [2024-05-12 10:34:47,655 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 [2024-05-12 10:34:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:34:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:34:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:34:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:34:47,668 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:34:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:34:47,669 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:34:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:34:47,669 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:34:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:34:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:34:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:34:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:34:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:34:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:34:47,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:34:47,674 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:34:47,782 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:34:47,783 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:34:48,152 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:34:48,152 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:34:48,235 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:34:48,236 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:34:48,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:48 BoogieIcfgContainer [2024-05-12 10:34:48,236 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:34:48,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:34:48,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:34:48,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:34:48,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:45" (1/4) ... [2024-05-12 10:34:48,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779c94a8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:34:48, skipping insertion in model container [2024-05-12 10:34:48,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:34:46" (2/4) ... [2024-05-12 10:34:48,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779c94a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:34:48, skipping insertion in model container [2024-05-12 10:34:48,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:47" (3/4) ... [2024-05-12 10:34:48,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779c94a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:34:48, skipping insertion in model container [2024-05-12 10:34:48,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:48" (4/4) ... [2024-05-12 10:34:48,244 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-05-12 10:34:48,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:34:48,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:34:48,257 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:34:48,325 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:34:48,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:48,382 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 10:34:48,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:48,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 10:34:48,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:48,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 10:34:48,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:34:48,406 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;@2f2419a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:34:48,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:34:48,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:34:48,411 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:34:48,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:48,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:48,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:34:48,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:48,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1708197830, now seen corresponding path program 1 times [2024-05-12 10:34:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134745168] [2024-05-12 10:34:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134745168] [2024-05-12 10:34:49,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134745168] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:49,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:49,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:34:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278785503] [2024-05-12 10:34:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:49,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:34:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:34:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:34:49,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-05-12 10:34:49,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2024-05-12 10:34:49,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:49,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-05-12 10:34:49,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:49,415 INFO L124 PetriNetUnfolderBase]: 740/1199 cut-off events. [2024-05-12 10:34:49,415 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-05-12 10:34:49,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2396 conditions, 1199 events. 740/1199 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6335 event pairs, 417 based on Foata normal form. 1/1153 useless extension candidates. Maximal degree in co-relation 2381. Up to 1128 conditions per place. [2024-05-12 10:34:49,424 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 33 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 10:34:49,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 193 flow [2024-05-12 10:34:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:34:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:34:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-05-12 10:34:49,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-05-12 10:34:49,434 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 97 transitions. [2024-05-12 10:34:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 193 flow [2024-05-12 10:34:49,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:49,438 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:49,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 10:34:49,442 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 10:34:49,442 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2024-05-12 10:34:49,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:49,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:49,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:34:49,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:49,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash -900565415, now seen corresponding path program 1 times [2024-05-12 10:34:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:49,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421945837] [2024-05-12 10:34:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:49,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:49,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:49,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421945837] [2024-05-12 10:34:49,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421945837] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:49,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:49,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:34:49,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786125009] [2024-05-12 10:34:49,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:34:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:34:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:34:49,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:49,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:49,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:49,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:50,070 INFO L124 PetriNetUnfolderBase]: 1218/1978 cut-off events. [2024-05-12 10:34:50,071 INFO L125 PetriNetUnfolderBase]: For 346/349 co-relation queries the response was YES. [2024-05-12 10:34:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4366 conditions, 1978 events. 1218/1978 cut-off events. For 346/349 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10974 event pairs, 576 based on Foata normal form. 7/1971 useless extension candidates. Maximal degree in co-relation 4351. Up to 1746 conditions per place. [2024-05-12 10:34:50,082 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 50 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-05-12 10:34:50,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 318 flow [2024-05-12 10:34:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-05-12 10:34:50,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902173913043478 [2024-05-12 10:34:50,088 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 127 transitions. [2024-05-12 10:34:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 318 flow [2024-05-12 10:34:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:50,093 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 187 flow [2024-05-12 10:34:50,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-05-12 10:34:50,099 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-05-12 10:34:50,099 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 187 flow [2024-05-12 10:34:50,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:50,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:50,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:50,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:34:50,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:50,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2147244585, now seen corresponding path program 1 times [2024-05-12 10:34:50,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:50,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865120635] [2024-05-12 10:34:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:50,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:50,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865120635] [2024-05-12 10:34:50,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865120635] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:50,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:50,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335956792] [2024-05-12 10:34:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:50,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:50,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:50,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:50,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 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) [2024-05-12 10:34:50,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:50,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:50,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:50,692 INFO L124 PetriNetUnfolderBase]: 1532/2447 cut-off events. [2024-05-12 10:34:50,693 INFO L125 PetriNetUnfolderBase]: For 1386/1386 co-relation queries the response was YES. [2024-05-12 10:34:50,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 2447 events. 1532/2447 cut-off events. For 1386/1386 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13565 event pairs, 528 based on Foata normal form. 3/2446 useless extension candidates. Maximal degree in co-relation 6273. Up to 2222 conditions per place. [2024-05-12 10:34:50,705 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 66 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-05-12 10:34:50,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 440 flow [2024-05-12 10:34:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 10:34:50,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-05-12 10:34:50,707 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 187 flow. Second operand 5 states and 147 transitions. [2024-05-12 10:34:50,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 440 flow [2024-05-12 10:34:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 438 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 10:34:50,710 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 272 flow [2024-05-12 10:34:50,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-05-12 10:34:50,711 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-05-12 10:34:50,712 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 272 flow [2024-05-12 10:34:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 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) [2024-05-12 10:34:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:34:50,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:50,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1917789224, now seen corresponding path program 1 times [2024-05-12 10:34:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431461297] [2024-05-12 10:34:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:51,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:51,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431461297] [2024-05-12 10:34:51,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431461297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:51,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:51,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224701842] [2024-05-12 10:34:51,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:51,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:51,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:51,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:51,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:51,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:51,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:51,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:51,319 INFO L124 PetriNetUnfolderBase]: 1523/2430 cut-off events. [2024-05-12 10:34:51,319 INFO L125 PetriNetUnfolderBase]: For 2098/2098 co-relation queries the response was YES. [2024-05-12 10:34:51,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 2430 events. 1523/2430 cut-off events. For 2098/2098 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13459 event pairs, 343 based on Foata normal form. 6/2432 useless extension candidates. Maximal degree in co-relation 6860. Up to 2169 conditions per place. [2024-05-12 10:34:51,336 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 72 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-05-12 10:34:51,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 524 flow [2024-05-12 10:34:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:34:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:34:51,338 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 272 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:34:51,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 524 flow [2024-05-12 10:34:51,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 522 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 10:34:51,341 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 307 flow [2024-05-12 10:34:51,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-05-12 10:34:51,342 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 10:34:51,342 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 307 flow [2024-05-12 10:34:51,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:51,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:51,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:51,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:34:51,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:51,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2044682512, now seen corresponding path program 1 times [2024-05-12 10:34:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:51,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145996662] [2024-05-12 10:34:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145996662] [2024-05-12 10:34:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145996662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:51,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:51,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402205047] [2024-05-12 10:34:51,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:51,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:51,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:51,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:51,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:51,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:52,025 INFO L124 PetriNetUnfolderBase]: 1510/2511 cut-off events. [2024-05-12 10:34:52,025 INFO L125 PetriNetUnfolderBase]: For 3198/3209 co-relation queries the response was YES. [2024-05-12 10:34:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7308 conditions, 2511 events. 1510/2511 cut-off events. For 3198/3209 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14516 event pairs, 712 based on Foata normal form. 12/2494 useless extension candidates. Maximal degree in co-relation 7282. Up to 2135 conditions per place. [2024-05-12 10:34:52,041 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 53 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-05-12 10:34:52,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 488 flow [2024-05-12 10:34:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-05-12 10:34:52,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:34:52,043 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 307 flow. Second operand 4 states and 118 transitions. [2024-05-12 10:34:52,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 488 flow [2024-05-12 10:34:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 461 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:52,047 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 342 flow [2024-05-12 10:34:52,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=342, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-05-12 10:34:52,048 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2024-05-12 10:34:52,048 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 342 flow [2024-05-12 10:34:52,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:52,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:52,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:52,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:34:52,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:52,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash -703068099, now seen corresponding path program 1 times [2024-05-12 10:34:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:52,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519028520] [2024-05-12 10:34:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:52,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519028520] [2024-05-12 10:34:52,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519028520] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:52,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:52,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87002721] [2024-05-12 10:34:52,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:52,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:52,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:52,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:52,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:52,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:52,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:52,819 INFO L124 PetriNetUnfolderBase]: 1549/2583 cut-off events. [2024-05-12 10:34:52,819 INFO L125 PetriNetUnfolderBase]: For 3791/3791 co-relation queries the response was YES. [2024-05-12 10:34:52,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7750 conditions, 2583 events. 1549/2583 cut-off events. For 3791/3791 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15128 event pairs, 647 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 7722. Up to 2097 conditions per place. [2024-05-12 10:34:52,834 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 72 selfloop transitions, 27 changer transitions 0/111 dead transitions. [2024-05-12 10:34:52,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 724 flow [2024-05-12 10:34:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 10:34:52,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-05-12 10:34:52,836 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 342 flow. Second operand 6 states and 182 transitions. [2024-05-12 10:34:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 724 flow [2024-05-12 10:34:52,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 709 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:52,841 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 453 flow [2024-05-12 10:34:52,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-05-12 10:34:52,842 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-05-12 10:34:52,842 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 453 flow [2024-05-12 10:34:52,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:52,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:52,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:52,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:34:52,843 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:52,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash 261239135, now seen corresponding path program 2 times [2024-05-12 10:34:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:52,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317432440] [2024-05-12 10:34:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317432440] [2024-05-12 10:34:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317432440] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:53,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:53,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146568638] [2024-05-12 10:34:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:53,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:53,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:53,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:53,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:53,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:53,681 INFO L124 PetriNetUnfolderBase]: 1583/2544 cut-off events. [2024-05-12 10:34:53,681 INFO L125 PetriNetUnfolderBase]: For 5438/5438 co-relation queries the response was YES. [2024-05-12 10:34:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 2544 events. 1583/2544 cut-off events. For 5438/5438 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14229 event pairs, 440 based on Foata normal form. 2/2535 useless extension candidates. Maximal degree in co-relation 8555. Up to 2212 conditions per place. [2024-05-12 10:34:53,697 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 76 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-05-12 10:34:53,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 779 flow [2024-05-12 10:34:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:34:53,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:34:53,699 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 453 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:34:53,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 779 flow [2024-05-12 10:34:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 749 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:53,708 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 539 flow [2024-05-12 10:34:53,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=539, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-05-12 10:34:53,709 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-05-12 10:34:53,709 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 539 flow [2024-05-12 10:34:53,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:53,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:53,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:53,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:34:53,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:53,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:53,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1774501303, now seen corresponding path program 3 times [2024-05-12 10:34:53,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:53,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619723805] [2024-05-12 10:34:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:53,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619723805] [2024-05-12 10:34:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619723805] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:54,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338444032] [2024-05-12 10:34:54,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:54,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:54,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 539 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:54,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:54,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:54,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:54,444 INFO L124 PetriNetUnfolderBase]: 1595/2568 cut-off events. [2024-05-12 10:34:54,444 INFO L125 PetriNetUnfolderBase]: For 6664/6664 co-relation queries the response was YES. [2024-05-12 10:34:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8902 conditions, 2568 events. 1595/2568 cut-off events. For 6664/6664 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14433 event pairs, 440 based on Foata normal form. 4/2561 useless extension candidates. Maximal degree in co-relation 8869. Up to 2155 conditions per place. [2024-05-12 10:34:54,461 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 75 selfloop transitions, 31 changer transitions 0/118 dead transitions. [2024-05-12 10:34:54,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 885 flow [2024-05-12 10:34:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:34:54,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 10:34:54,463 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 539 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:34:54,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 885 flow [2024-05-12 10:34:54,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 827 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:54,474 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 594 flow [2024-05-12 10:34:54,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-05-12 10:34:54,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-05-12 10:34:54,475 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 594 flow [2024-05-12 10:34:54,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:54,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:54,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:34:54,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:54,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1779617419, now seen corresponding path program 1 times [2024-05-12 10:34:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382927319] [2024-05-12 10:34:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382927319] [2024-05-12 10:34:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382927319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:54,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:54,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387528637] [2024-05-12 10:34:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:54,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:54,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:54,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 594 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:54,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:54,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:54,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:55,121 INFO L124 PetriNetUnfolderBase]: 1614/2722 cut-off events. [2024-05-12 10:34:55,121 INFO L125 PetriNetUnfolderBase]: For 8599/8613 co-relation queries the response was YES. [2024-05-12 10:34:55,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 2722 events. 1614/2722 cut-off events. For 8599/8613 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16151 event pairs, 621 based on Foata normal form. 18/2709 useless extension candidates. Maximal degree in co-relation 9328. Up to 2219 conditions per place. [2024-05-12 10:34:55,140 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 76 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-05-12 10:34:55,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 858 flow [2024-05-12 10:34:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 10:34:55,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260869565217392 [2024-05-12 10:34:55,141 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 594 flow. Second operand 5 states and 144 transitions. [2024-05-12 10:34:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 858 flow [2024-05-12 10:34:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 794 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:55,152 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 604 flow [2024-05-12 10:34:55,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=604, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-05-12 10:34:55,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-05-12 10:34:55,153 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 604 flow [2024-05-12 10:34:55,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-05-12 10:34:55,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:34:55,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -320273085, now seen corresponding path program 1 times [2024-05-12 10:34:55,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86739470] [2024-05-12 10:34:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86739470] [2024-05-12 10:34:55,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86739470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:55,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:55,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102612416] [2024-05-12 10:34:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:55,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:55,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:55,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:55,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:55,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:55,949 INFO L124 PetriNetUnfolderBase]: 1609/2662 cut-off events. [2024-05-12 10:34:55,950 INFO L125 PetriNetUnfolderBase]: For 8324/8324 co-relation queries the response was YES. [2024-05-12 10:34:55,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9509 conditions, 2662 events. 1609/2662 cut-off events. For 8324/8324 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15377 event pairs, 505 based on Foata normal form. 2/2653 useless extension candidates. Maximal degree in co-relation 9473. Up to 2151 conditions per place. [2024-05-12 10:34:55,967 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 84 selfloop transitions, 37 changer transitions 0/133 dead transitions. [2024-05-12 10:34:55,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 990 flow [2024-05-12 10:34:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:34:55,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-05-12 10:34:55,969 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 604 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:34:55,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 990 flow [2024-05-12 10:34:55,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 940 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:55,982 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 636 flow [2024-05-12 10:34:55,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-05-12 10:34:55,984 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-05-12 10:34:55,985 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 636 flow [2024-05-12 10:34:55,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:34:55,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash -491519903, now seen corresponding path program 2 times [2024-05-12 10:34:55,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528729056] [2024-05-12 10:34:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528729056] [2024-05-12 10:34:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528729056] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:56,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:56,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853206904] [2024-05-12 10:34:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:56,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:56,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:56,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:56,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:56,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:56,698 INFO L124 PetriNetUnfolderBase]: 1626/2727 cut-off events. [2024-05-12 10:34:56,698 INFO L125 PetriNetUnfolderBase]: For 9916/9927 co-relation queries the response was YES. [2024-05-12 10:34:56,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9818 conditions, 2727 events. 1626/2727 cut-off events. For 9916/9927 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16124 event pairs, 674 based on Foata normal form. 10/2702 useless extension candidates. Maximal degree in co-relation 9781. Up to 2195 conditions per place. [2024-05-12 10:34:56,720 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 74 selfloop transitions, 29 changer transitions 0/115 dead transitions. [2024-05-12 10:34:56,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 970 flow [2024-05-12 10:34:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 10:34:56,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 10:34:56,722 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 636 flow. Second operand 5 states and 149 transitions. [2024-05-12 10:34:56,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 970 flow [2024-05-12 10:34:56,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 847 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-05-12 10:34:56,735 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 610 flow [2024-05-12 10:34:56,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2024-05-12 10:34:56,735 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-05-12 10:34:56,735 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 610 flow [2024-05-12 10:34:56,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:56,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:34:56,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:56,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash 27537615, now seen corresponding path program 3 times [2024-05-12 10:34:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42841505] [2024-05-12 10:34:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:57,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42841505] [2024-05-12 10:34:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42841505] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:57,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:57,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683262330] [2024-05-12 10:34:57,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:57,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:57,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:57,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 610 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:57,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:57,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:57,545 INFO L124 PetriNetUnfolderBase]: 1621/2715 cut-off events. [2024-05-12 10:34:57,545 INFO L125 PetriNetUnfolderBase]: For 9853/9856 co-relation queries the response was YES. [2024-05-12 10:34:57,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9717 conditions, 2715 events. 1621/2715 cut-off events. For 9853/9856 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16021 event pairs, 635 based on Foata normal form. 4/2695 useless extension candidates. Maximal degree in co-relation 9681. Up to 2190 conditions per place. [2024-05-12 10:34:57,562 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 87 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-05-12 10:34:57,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 962 flow [2024-05-12 10:34:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 10:34:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 10:34:57,564 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 610 flow. Second operand 8 states and 226 transitions. [2024-05-12 10:34:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 962 flow [2024-05-12 10:34:57,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 914 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:57,579 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 640 flow [2024-05-12 10:34:57,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=640, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-05-12 10:34:57,580 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2024-05-12 10:34:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 640 flow [2024-05-12 10:34:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:57,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:34:57,581 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:57,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1824600636, now seen corresponding path program 1 times [2024-05-12 10:34:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:57,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466804133] [2024-05-12 10:34:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466804133] [2024-05-12 10:34:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466804133] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:57,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697331508] [2024-05-12 10:34:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:57,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:57,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 640 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:57,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:58,344 INFO L124 PetriNetUnfolderBase]: 1770/2842 cut-off events. [2024-05-12 10:34:58,344 INFO L125 PetriNetUnfolderBase]: For 13030/13030 co-relation queries the response was YES. [2024-05-12 10:34:58,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10835 conditions, 2842 events. 1770/2842 cut-off events. For 13030/13030 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16294 event pairs, 299 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 10798. Up to 2114 conditions per place. [2024-05-12 10:34:58,361 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 83 selfloop transitions, 44 changer transitions 0/139 dead transitions. [2024-05-12 10:34:58,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1094 flow [2024-05-12 10:34:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:34:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:34:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:34:58,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 10:34:58,362 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 640 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:34:58,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1094 flow [2024-05-12 10:34:58,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 983 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:34:58,381 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 668 flow [2024-05-12 10:34:58,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=668, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2024-05-12 10:34:58,381 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-05-12 10:34:58,382 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 668 flow [2024-05-12 10:34:58,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:58,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:58,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:34:58,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:58,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1827457596, now seen corresponding path program 2 times [2024-05-12 10:34:58,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:58,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525281498] [2024-05-12 10:34:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:58,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525281498] [2024-05-12 10:34:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525281498] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660806738] [2024-05-12 10:34:58,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:58,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:58,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 668 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:58,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:59,111 INFO L124 PetriNetUnfolderBase]: 1797/2970 cut-off events. [2024-05-12 10:34:59,111 INFO L125 PetriNetUnfolderBase]: For 15364/15364 co-relation queries the response was YES. [2024-05-12 10:34:59,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11464 conditions, 2970 events. 1797/2970 cut-off events. For 15364/15364 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17460 event pairs, 497 based on Foata normal form. 4/2957 useless extension candidates. Maximal degree in co-relation 11427. Up to 2414 conditions per place. [2024-05-12 10:34:59,134 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 82 selfloop transitions, 41 changer transitions 0/135 dead transitions. [2024-05-12 10:34:59,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1034 flow [2024-05-12 10:34:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:34:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:34:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:34:59,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:34:59,189 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 668 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:34:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1034 flow [2024-05-12 10:34:59,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 969 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:59,213 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 720 flow [2024-05-12 10:34:59,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2024-05-12 10:34:59,214 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-05-12 10:34:59,214 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 720 flow [2024-05-12 10:34:59,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:59,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:34:59,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:59,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash -939659330, now seen corresponding path program 3 times [2024-05-12 10:34:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032740354] [2024-05-12 10:34:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032740354] [2024-05-12 10:34:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032740354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:59,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:59,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664932511] [2024-05-12 10:34:59,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:59,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:59,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:00,003 INFO L124 PetriNetUnfolderBase]: 1824/2949 cut-off events. [2024-05-12 10:35:00,004 INFO L125 PetriNetUnfolderBase]: For 17594/17594 co-relation queries the response was YES. [2024-05-12 10:35:00,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11961 conditions, 2949 events. 1824/2949 cut-off events. For 17594/17594 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17140 event pairs, 449 based on Foata normal form. 4/2936 useless extension candidates. Maximal degree in co-relation 11922. Up to 2559 conditions per place. [2024-05-12 10:35:00,026 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 98 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-05-12 10:35:00,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1080 flow [2024-05-12 10:35:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:35:00,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:35:00,028 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 720 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:35:00,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1080 flow [2024-05-12 10:35:00,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 985 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:00,048 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 712 flow [2024-05-12 10:35:00,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2024-05-12 10:35:00,048 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2024-05-12 10:35:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 712 flow [2024-05-12 10:35:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:00,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:00,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:35:00,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -130479864, now seen corresponding path program 1 times [2024-05-12 10:35:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816448650] [2024-05-12 10:35:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:00,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816448650] [2024-05-12 10:35:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816448650] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:35:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065972948] [2024-05-12 10:35:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:00,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:35:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:35:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:35:00,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:00,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-05-12 10:35:00,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:00,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:00,911 INFO L124 PetriNetUnfolderBase]: 1767/2894 cut-off events. [2024-05-12 10:35:00,911 INFO L125 PetriNetUnfolderBase]: For 19397/19403 co-relation queries the response was YES. [2024-05-12 10:35:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 2894 events. 1767/2894 cut-off events. For 19397/19403 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17140 event pairs, 407 based on Foata normal form. 9/2874 useless extension candidates. Maximal degree in co-relation 11705. Up to 2421 conditions per place. [2024-05-12 10:35:00,936 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 89 selfloop transitions, 28 changer transitions 0/134 dead transitions. [2024-05-12 10:35:00,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1138 flow [2024-05-12 10:35:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 10:35:00,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:35:00,938 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 712 flow. Second operand 5 states and 150 transitions. [2024-05-12 10:35:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1138 flow [2024-05-12 10:35:00,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 1073 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:00,964 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 815 flow [2024-05-12 10:35:00,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-05-12 10:35:00,964 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-05-12 10:35:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 815 flow [2024-05-12 10:35:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-05-12 10:35:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:35:00,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:00,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2108387900, now seen corresponding path program 4 times [2024-05-12 10:35:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895858734] [2024-05-12 10:35:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:00,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:01,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895858734] [2024-05-12 10:35:01,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895858734] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:01,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:01,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614089409] [2024-05-12 10:35:01,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:01,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:01,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 815 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:01,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:01,824 INFO L124 PetriNetUnfolderBase]: 1835/2930 cut-off events. [2024-05-12 10:35:01,825 INFO L125 PetriNetUnfolderBase]: For 21335/21335 co-relation queries the response was YES. [2024-05-12 10:35:01,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12355 conditions, 2930 events. 1835/2930 cut-off events. For 21335/21335 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16716 event pairs, 262 based on Foata normal form. 20/2939 useless extension candidates. Maximal degree in co-relation 12313. Up to 2293 conditions per place. [2024-05-12 10:35:01,849 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 101 selfloop transitions, 40 changer transitions 0/153 dead transitions. [2024-05-12 10:35:01,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1209 flow [2024-05-12 10:35:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:35:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 10:35:01,851 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 815 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:35:01,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1209 flow [2024-05-12 10:35:01,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 153 transitions, 1183 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:01,879 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 883 flow [2024-05-12 10:35:01,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-05-12 10:35:01,879 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2024-05-12 10:35:01,879 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 883 flow [2024-05-12 10:35:01,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:01,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:01,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:35:01,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:01,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash -823886508, now seen corresponding path program 1 times [2024-05-12 10:35:01,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138943390] [2024-05-12 10:35:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138943390] [2024-05-12 10:35:02,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138943390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:02,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103739176] [2024-05-12 10:35:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:02,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:02,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:02,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:02,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:02,571 INFO L124 PetriNetUnfolderBase]: 1862/2971 cut-off events. [2024-05-12 10:35:02,572 INFO L125 PetriNetUnfolderBase]: For 21931/21931 co-relation queries the response was YES. [2024-05-12 10:35:02,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12888 conditions, 2971 events. 1862/2971 cut-off events. For 21931/21931 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17013 event pairs, 403 based on Foata normal form. 4/2962 useless extension candidates. Maximal degree in co-relation 12843. Up to 2621 conditions per place. [2024-05-12 10:35:02,592 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 105 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-05-12 10:35:02,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 137 transitions, 1215 flow [2024-05-12 10:35:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 10:35:02,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-05-12 10:35:02,593 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 883 flow. Second operand 5 states and 147 transitions. [2024-05-12 10:35:02,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 137 transitions, 1215 flow [2024-05-12 10:35:02,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 1124 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:02,623 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 865 flow [2024-05-12 10:35:02,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-05-12 10:35:02,623 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-05-12 10:35:02,623 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 865 flow [2024-05-12 10:35:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:02,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:02,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:35:02,624 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:02,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash -815315628, now seen corresponding path program 2 times [2024-05-12 10:35:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:02,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922962663] [2024-05-12 10:35:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:02,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:02,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922962663] [2024-05-12 10:35:02,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922962663] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:02,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:02,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680059356] [2024-05-12 10:35:02,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:02,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:02,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:03,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:03,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 865 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:03,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:03,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:03,279 INFO L124 PetriNetUnfolderBase]: 1854/2986 cut-off events. [2024-05-12 10:35:03,280 INFO L125 PetriNetUnfolderBase]: For 21643/21654 co-relation queries the response was YES. [2024-05-12 10:35:03,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12727 conditions, 2986 events. 1854/2986 cut-off events. For 21643/21654 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17271 event pairs, 381 based on Foata normal form. 12/2978 useless extension candidates. Maximal degree in co-relation 12681. Up to 2524 conditions per place. [2024-05-12 10:35:03,299 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 105 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-05-12 10:35:03,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1195 flow [2024-05-12 10:35:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-05-12 10:35:03,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-05-12 10:35:03,301 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 865 flow. Second operand 5 states and 143 transitions. [2024-05-12 10:35:03,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1195 flow [2024-05-12 10:35:03,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 137 transitions, 1140 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:03,324 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 887 flow [2024-05-12 10:35:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=887, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-05-12 10:35:03,325 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-05-12 10:35:03,325 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 887 flow [2024-05-12 10:35:03,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:03,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:35:03,326 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:03,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1447117906, now seen corresponding path program 2 times [2024-05-12 10:35:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:03,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532460497] [2024-05-12 10:35:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:03,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532460497] [2024-05-12 10:35:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532460497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:03,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:03,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:35:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302028314] [2024-05-12 10:35:03,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:35:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:35:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:35:03,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:03,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 887 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-05-12 10:35:03,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:03,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:03,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:04,025 INFO L124 PetriNetUnfolderBase]: 1844/2982 cut-off events. [2024-05-12 10:35:04,026 INFO L125 PetriNetUnfolderBase]: For 23958/23958 co-relation queries the response was YES. [2024-05-12 10:35:04,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13061 conditions, 2982 events. 1844/2982 cut-off events. For 23958/23958 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17510 event pairs, 388 based on Foata normal form. 6/2960 useless extension candidates. Maximal degree in co-relation 13014. Up to 2514 conditions per place. [2024-05-12 10:35:04,045 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 101 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-05-12 10:35:04,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 155 transitions, 1384 flow [2024-05-12 10:35:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-05-12 10:35:04,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-05-12 10:35:04,047 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 887 flow. Second operand 5 states and 154 transitions. [2024-05-12 10:35:04,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 155 transitions, 1384 flow [2024-05-12 10:35:04,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1325 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:04,082 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 1092 flow [2024-05-12 10:35:04,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1092, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2024-05-12 10:35:04,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-05-12 10:35:04,083 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 1092 flow [2024-05-12 10:35:04,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-05-12 10:35:04,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:04,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:35:04,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:04,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1567708612, now seen corresponding path program 1 times [2024-05-12 10:35:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639627608] [2024-05-12 10:35:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:04,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639627608] [2024-05-12 10:35:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639627608] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:04,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:04,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:04,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500840740] [2024-05-12 10:35:04,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:04,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:04,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:04,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:04,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:04,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 1092 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:04,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:04,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:04,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:04,851 INFO L124 PetriNetUnfolderBase]: 2106/3406 cut-off events. [2024-05-12 10:35:04,852 INFO L125 PetriNetUnfolderBase]: For 32874/32885 co-relation queries the response was YES. [2024-05-12 10:35:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15740 conditions, 3406 events. 2106/3406 cut-off events. For 32874/32885 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20458 event pairs, 296 based on Foata normal form. 20/3408 useless extension candidates. Maximal degree in co-relation 15691. Up to 2284 conditions per place. [2024-05-12 10:35:04,877 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 125 selfloop transitions, 40 changer transitions 0/177 dead transitions. [2024-05-12 10:35:04,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 1652 flow [2024-05-12 10:35:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:04,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:04,879 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 1092 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:04,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 1652 flow [2024-05-12 10:35:04,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 177 transitions, 1630 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:04,923 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 1194 flow [2024-05-12 10:35:04,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1194, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-05-12 10:35:04,923 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-05-12 10:35:04,923 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 1194 flow [2024-05-12 10:35:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:04,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:04,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:35:04,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:04,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1368414146, now seen corresponding path program 2 times [2024-05-12 10:35:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915715952] [2024-05-12 10:35:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:05,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915715952] [2024-05-12 10:35:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915715952] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:05,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:05,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765851563] [2024-05-12 10:35:05,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:05,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:05,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:05,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:05,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 1194 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:05,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:05,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:05,872 INFO L124 PetriNetUnfolderBase]: 2295/3810 cut-off events. [2024-05-12 10:35:05,872 INFO L125 PetriNetUnfolderBase]: For 41059/41059 co-relation queries the response was YES. [2024-05-12 10:35:05,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17987 conditions, 3810 events. 2295/3810 cut-off events. For 41059/41059 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23872 event pairs, 738 based on Foata normal form. 12/3780 useless extension candidates. Maximal degree in co-relation 17936. Up to 2912 conditions per place. [2024-05-12 10:35:05,897 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 143 selfloop transitions, 44 changer transitions 0/199 dead transitions. [2024-05-12 10:35:05,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 199 transitions, 1854 flow [2024-05-12 10:35:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-05-12 10:35:05,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152173913043478 [2024-05-12 10:35:05,900 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 1194 flow. Second operand 10 states and 283 transitions. [2024-05-12 10:35:05,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 199 transitions, 1854 flow [2024-05-12 10:35:05,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 199 transitions, 1804 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:05,975 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 1280 flow [2024-05-12 10:35:05,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1280, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-05-12 10:35:05,975 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 10:35:05,975 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 1280 flow [2024-05-12 10:35:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:05,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:05,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:35:05,976 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:05,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 729924042, now seen corresponding path program 3 times [2024-05-12 10:35:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216125403] [2024-05-12 10:35:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:06,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:06,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216125403] [2024-05-12 10:35:06,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216125403] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:06,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228566481] [2024-05-12 10:35:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:06,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:06,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 1280 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:06,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:06,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:06,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:06,785 INFO L124 PetriNetUnfolderBase]: 2267/3665 cut-off events. [2024-05-12 10:35:06,785 INFO L125 PetriNetUnfolderBase]: For 42506/42517 co-relation queries the response was YES. [2024-05-12 10:35:06,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17765 conditions, 3665 events. 2267/3665 cut-off events. For 42506/42517 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22267 event pairs, 500 based on Foata normal form. 24/3671 useless extension candidates. Maximal degree in co-relation 17712. Up to 3029 conditions per place. [2024-05-12 10:35:06,812 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 127 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-05-12 10:35:06,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 1708 flow [2024-05-12 10:35:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:35:06,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:35:06,813 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 1280 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:35:06,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 1708 flow [2024-05-12 10:35:06,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1635 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:06,877 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 1282 flow [2024-05-12 10:35:06,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1282, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-05-12 10:35:06,878 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-05-12 10:35:06,878 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 1282 flow [2024-05-12 10:35:06,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:06,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:06,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:06,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:35:06,879 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:06,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash 23171394, now seen corresponding path program 1 times [2024-05-12 10:35:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:06,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637922618] [2024-05-12 10:35:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:06,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:07,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:07,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637922618] [2024-05-12 10:35:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637922618] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:07,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:07,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086542884] [2024-05-12 10:35:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:07,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:07,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:07,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:07,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:07,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:07,678 INFO L124 PetriNetUnfolderBase]: 2278/3684 cut-off events. [2024-05-12 10:35:07,678 INFO L125 PetriNetUnfolderBase]: For 39879/39879 co-relation queries the response was YES. [2024-05-12 10:35:07,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 3684 events. 2278/3684 cut-off events. For 39879/39879 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22390 event pairs, 563 based on Foata normal form. 1/3677 useless extension candidates. Maximal degree in co-relation 17805. Up to 3319 conditions per place. [2024-05-12 10:35:07,709 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 144 selfloop transitions, 22 changer transitions 0/178 dead transitions. [2024-05-12 10:35:07,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 178 transitions, 1818 flow [2024-05-12 10:35:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:35:07,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-05-12 10:35:07,710 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 1282 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:35:07,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 178 transitions, 1818 flow [2024-05-12 10:35:07,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 1745 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:07,773 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1380 flow [2024-05-12 10:35:07,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2024-05-12 10:35:07,773 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 72 predicate places. [2024-05-12 10:35:07,773 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1380 flow [2024-05-12 10:35:07,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:07,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:07,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:35:07,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:07,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash 101181356, now seen corresponding path program 4 times [2024-05-12 10:35:07,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:07,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780917731] [2024-05-12 10:35:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:07,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780917731] [2024-05-12 10:35:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780917731] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:08,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:08,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:08,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515329037] [2024-05-12 10:35:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:08,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:08,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:08,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:08,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:08,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:08,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:08,696 INFO L124 PetriNetUnfolderBase]: 2372/3850 cut-off events. [2024-05-12 10:35:08,696 INFO L125 PetriNetUnfolderBase]: For 48151/48165 co-relation queries the response was YES. [2024-05-12 10:35:08,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 3850 events. 2372/3850 cut-off events. For 48151/48165 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23793 event pairs, 505 based on Foata normal form. 26/3867 useless extension candidates. Maximal degree in co-relation 18962. Up to 3220 conditions per place. [2024-05-12 10:35:08,727 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 34 changer transitions 0/194 dead transitions. [2024-05-12 10:35:08,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 194 transitions, 1888 flow [2024-05-12 10:35:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:35:08,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 10:35:08,729 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1380 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:35:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 194 transitions, 1888 flow [2024-05-12 10:35:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 194 transitions, 1868 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:08,817 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1459 flow [2024-05-12 10:35:08,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1459, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-05-12 10:35:08,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-05-12 10:35:08,817 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1459 flow [2024-05-12 10:35:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:08,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:08,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:35:08,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:08,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:08,818 INFO L85 PathProgramCache]: Analyzing trace with hash 688525058, now seen corresponding path program 5 times [2024-05-12 10:35:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639766686] [2024-05-12 10:35:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639766686] [2024-05-12 10:35:09,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639766686] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:09,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:09,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775641076] [2024-05-12 10:35:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:09,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:09,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:09,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:09,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:09,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:09,754 INFO L124 PetriNetUnfolderBase]: 2431/4089 cut-off events. [2024-05-12 10:35:09,755 INFO L125 PetriNetUnfolderBase]: For 52911/52911 co-relation queries the response was YES. [2024-05-12 10:35:09,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19903 conditions, 4089 events. 2431/4089 cut-off events. For 52911/52911 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26363 event pairs, 833 based on Foata normal form. 16/4055 useless extension candidates. Maximal degree in co-relation 19842. Up to 3317 conditions per place. [2024-05-12 10:35:09,786 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 145 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2024-05-12 10:35:09,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 1959 flow [2024-05-12 10:35:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:09,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:09,788 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1459 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:09,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 1959 flow [2024-05-12 10:35:09,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1882 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:09,871 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1485 flow [2024-05-12 10:35:09,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1485, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-05-12 10:35:09,871 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-05-12 10:35:09,872 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1485 flow [2024-05-12 10:35:09,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:09,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:09,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:35:09,872 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:09,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash 95671106, now seen corresponding path program 6 times [2024-05-12 10:35:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088070067] [2024-05-12 10:35:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088070067] [2024-05-12 10:35:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088070067] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:10,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:10,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266729934] [2024-05-12 10:35:10,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:10,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:10,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:10,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:10,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:10,719 INFO L124 PetriNetUnfolderBase]: 2411/3931 cut-off events. [2024-05-12 10:35:10,719 INFO L125 PetriNetUnfolderBase]: For 51145/51156 co-relation queries the response was YES. [2024-05-12 10:35:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19373 conditions, 3931 events. 2411/3931 cut-off events. For 51145/51156 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24507 event pairs, 373 based on Foata normal form. 20/3933 useless extension candidates. Maximal degree in co-relation 19311. Up to 2818 conditions per place. [2024-05-12 10:35:10,752 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 138 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-05-12 10:35:10,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 1941 flow [2024-05-12 10:35:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:35:10,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:35:10,753 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1485 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:35:10,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 1941 flow [2024-05-12 10:35:10,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 1854 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:10,853 INFO L231 Difference]: Finished difference. Result has 132 places, 149 transitions, 1477 flow [2024-05-12 10:35:10,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=132, PETRI_TRANSITIONS=149} [2024-05-12 10:35:10,853 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-05-12 10:35:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 149 transitions, 1477 flow [2024-05-12 10:35:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:10,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:35:10,854 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:10,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 694102640, now seen corresponding path program 1 times [2024-05-12 10:35:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:10,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360733979] [2024-05-12 10:35:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360733979] [2024-05-12 10:35:11,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360733979] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:11,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:11,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:11,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300051064] [2024-05-12 10:35:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:11,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:11,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:11,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 149 transitions, 1477 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:11,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:11,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:11,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:11,850 INFO L124 PetriNetUnfolderBase]: 2478/4023 cut-off events. [2024-05-12 10:35:11,850 INFO L125 PetriNetUnfolderBase]: For 52191/52194 co-relation queries the response was YES. [2024-05-12 10:35:11,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19800 conditions, 4023 events. 2478/4023 cut-off events. For 52191/52194 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25026 event pairs, 436 based on Foata normal form. 14/4034 useless extension candidates. Maximal degree in co-relation 19737. Up to 3111 conditions per place. [2024-05-12 10:35:11,882 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 155 selfloop transitions, 41 changer transitions 0/208 dead transitions. [2024-05-12 10:35:11,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 208 transitions, 2045 flow [2024-05-12 10:35:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-05-12 10:35:11,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6183574879227053 [2024-05-12 10:35:11,883 INFO L175 Difference]: Start difference. First operand has 132 places, 149 transitions, 1477 flow. Second operand 9 states and 256 transitions. [2024-05-12 10:35:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 208 transitions, 2045 flow [2024-05-12 10:35:11,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 1916 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:11,954 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1458 flow [2024-05-12 10:35:11,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1458, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-05-12 10:35:11,954 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-05-12 10:35:11,954 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1458 flow [2024-05-12 10:35:11,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:11,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:11,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:11,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:35:11,955 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:11,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1237878470, now seen corresponding path program 1 times [2024-05-12 10:35:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:11,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161042545] [2024-05-12 10:35:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:11,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:12,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161042545] [2024-05-12 10:35:12,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161042545] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:12,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:12,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432156220] [2024-05-12 10:35:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:12,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:12,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1458 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:12,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:12,978 INFO L124 PetriNetUnfolderBase]: 2435/4047 cut-off events. [2024-05-12 10:35:12,978 INFO L125 PetriNetUnfolderBase]: For 53019/53025 co-relation queries the response was YES. [2024-05-12 10:35:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19509 conditions, 4047 events. 2435/4047 cut-off events. For 53019/53025 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26074 event pairs, 530 based on Foata normal form. 9/4015 useless extension candidates. Maximal degree in co-relation 19446. Up to 3271 conditions per place. [2024-05-12 10:35:13,029 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 110 selfloop transitions, 57 changer transitions 0/188 dead transitions. [2024-05-12 10:35:13,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 2084 flow [2024-05-12 10:35:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:35:13,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:35:13,031 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1458 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:35:13,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 2084 flow [2024-05-12 10:35:13,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 188 transitions, 1990 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:13,114 INFO L231 Difference]: Finished difference. Result has 135 places, 162 transitions, 1655 flow [2024-05-12 10:35:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1655, PETRI_PLACES=135, PETRI_TRANSITIONS=162} [2024-05-12 10:35:13,115 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-05-12 10:35:13,115 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 162 transitions, 1655 flow [2024-05-12 10:35:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:13,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:13,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:35:13,115 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:13,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -92206330, now seen corresponding path program 2 times [2024-05-12 10:35:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511577759] [2024-05-12 10:35:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:13,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511577759] [2024-05-12 10:35:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511577759] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:13,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:13,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140613341] [2024-05-12 10:35:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:13,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:13,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:13,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 162 transitions, 1655 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:13,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:13,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:14,015 INFO L124 PetriNetUnfolderBase]: 2536/4117 cut-off events. [2024-05-12 10:35:14,015 INFO L125 PetriNetUnfolderBase]: For 55160/55160 co-relation queries the response was YES. [2024-05-12 10:35:14,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20660 conditions, 4117 events. 2536/4117 cut-off events. For 55160/55160 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25668 event pairs, 500 based on Foata normal form. 1/4116 useless extension candidates. Maximal degree in co-relation 20595. Up to 3719 conditions per place. [2024-05-12 10:35:14,048 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 154 selfloop transitions, 25 changer transitions 0/191 dead transitions. [2024-05-12 10:35:14,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 191 transitions, 2152 flow [2024-05-12 10:35:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:35:14,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:35:14,049 INFO L175 Difference]: Start difference. First operand has 135 places, 162 transitions, 1655 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:35:14,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 191 transitions, 2152 flow [2024-05-12 10:35:14,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 191 transitions, 2097 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:14,127 INFO L231 Difference]: Finished difference. Result has 140 places, 166 transitions, 1683 flow [2024-05-12 10:35:14,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1683, PETRI_PLACES=140, PETRI_TRANSITIONS=166} [2024-05-12 10:35:14,127 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2024-05-12 10:35:14,127 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 166 transitions, 1683 flow [2024-05-12 10:35:14,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:14,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:14,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:14,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:35:14,128 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:14,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -861874536, now seen corresponding path program 2 times [2024-05-12 10:35:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:14,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790131563] [2024-05-12 10:35:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790131563] [2024-05-12 10:35:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790131563] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:14,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:14,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346358790] [2024-05-12 10:35:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:14,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:14,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 166 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:14,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:14,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:15,062 INFO L124 PetriNetUnfolderBase]: 2603/4245 cut-off events. [2024-05-12 10:35:15,063 INFO L125 PetriNetUnfolderBase]: For 61240/61240 co-relation queries the response was YES. [2024-05-12 10:35:15,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20797 conditions, 4245 events. 2603/4245 cut-off events. For 61240/61240 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26712 event pairs, 366 based on Foata normal form. 12/4246 useless extension candidates. Maximal degree in co-relation 20729. Up to 3367 conditions per place. [2024-05-12 10:35:15,094 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 164 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2024-05-12 10:35:15,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 2261 flow [2024-05-12 10:35:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 10:35:15,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 10:35:15,095 INFO L175 Difference]: Start difference. First operand has 140 places, 166 transitions, 1683 flow. Second operand 8 states and 233 transitions. [2024-05-12 10:35:15,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 2261 flow [2024-05-12 10:35:15,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 219 transitions, 2225 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:15,175 INFO L231 Difference]: Finished difference. Result has 146 places, 167 transitions, 1763 flow [2024-05-12 10:35:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1763, PETRI_PLACES=146, PETRI_TRANSITIONS=167} [2024-05-12 10:35:15,175 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-05-12 10:35:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 167 transitions, 1763 flow [2024-05-12 10:35:15,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:15,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:15,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:35:15,176 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:15,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash 562833374, now seen corresponding path program 3 times [2024-05-12 10:35:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:15,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977215894] [2024-05-12 10:35:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:15,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977215894] [2024-05-12 10:35:15,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977215894] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:15,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:15,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:15,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541335077] [2024-05-12 10:35:15,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:15,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:15,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 167 transitions, 1763 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:15,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:15,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:15,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:16,051 INFO L124 PetriNetUnfolderBase]: 2583/4240 cut-off events. [2024-05-12 10:35:16,051 INFO L125 PetriNetUnfolderBase]: For 63000/63011 co-relation queries the response was YES. [2024-05-12 10:35:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20801 conditions, 4240 events. 2583/4240 cut-off events. For 63000/63011 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26996 event pairs, 353 based on Foata normal form. 20/4246 useless extension candidates. Maximal degree in co-relation 20732. Up to 2675 conditions per place. [2024-05-12 10:35:16,084 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 156 selfloop transitions, 42 changer transitions 0/210 dead transitions. [2024-05-12 10:35:16,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 210 transitions, 2231 flow [2024-05-12 10:35:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:35:16,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:16,085 INFO L175 Difference]: Start difference. First operand has 146 places, 167 transitions, 1763 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:35:16,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 210 transitions, 2231 flow [2024-05-12 10:35:16,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2125 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:16,174 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1695 flow [2024-05-12 10:35:16,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-05-12 10:35:16,175 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-05-12 10:35:16,176 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1695 flow [2024-05-12 10:35:16,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:16,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:16,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:16,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:35:16,176 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:16,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash 262056710, now seen corresponding path program 3 times [2024-05-12 10:35:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093016039] [2024-05-12 10:35:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:16,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093016039] [2024-05-12 10:35:16,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093016039] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:16,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:16,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795662440] [2024-05-12 10:35:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:16,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1695 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:16,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:16,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:16,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:17,061 INFO L124 PetriNetUnfolderBase]: 2591/4351 cut-off events. [2024-05-12 10:35:17,062 INFO L125 PetriNetUnfolderBase]: For 57115/57115 co-relation queries the response was YES. [2024-05-12 10:35:17,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20771 conditions, 4351 events. 2591/4351 cut-off events. For 57115/57115 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28330 event pairs, 918 based on Foata normal form. 2/4316 useless extension candidates. Maximal degree in co-relation 20701. Up to 3808 conditions per place. [2024-05-12 10:35:17,097 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 164 selfloop transitions, 26 changer transitions 0/202 dead transitions. [2024-05-12 10:35:17,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 202 transitions, 2210 flow [2024-05-12 10:35:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 10:35:17,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 10:35:17,098 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1695 flow. Second operand 5 states and 149 transitions. [2024-05-12 10:35:17,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 202 transitions, 2210 flow [2024-05-12 10:35:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 202 transitions, 2065 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:17,210 INFO L231 Difference]: Finished difference. Result has 146 places, 175 transitions, 1719 flow [2024-05-12 10:35:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1719, PETRI_PLACES=146, PETRI_TRANSITIONS=175} [2024-05-12 10:35:17,211 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-05-12 10:35:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 175 transitions, 1719 flow [2024-05-12 10:35:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:17,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:35:17,211 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2015156392, now seen corresponding path program 2 times [2024-05-12 10:35:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447908508] [2024-05-12 10:35:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:17,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447908508] [2024-05-12 10:35:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447908508] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:17,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:17,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099575594] [2024-05-12 10:35:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:17,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:17,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 175 transitions, 1719 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:17,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:17,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:17,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:18,098 INFO L124 PetriNetUnfolderBase]: 2556/4251 cut-off events. [2024-05-12 10:35:18,098 INFO L125 PetriNetUnfolderBase]: For 60088/60094 co-relation queries the response was YES. [2024-05-12 10:35:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20301 conditions, 4251 events. 2556/4251 cut-off events. For 60088/60094 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27546 event pairs, 512 based on Foata normal form. 9/4228 useless extension candidates. Maximal degree in co-relation 20230. Up to 3529 conditions per place. [2024-05-12 10:35:18,135 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 135 selfloop transitions, 54 changer transitions 0/215 dead transitions. [2024-05-12 10:35:18,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 215 transitions, 2418 flow [2024-05-12 10:35:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:35:18,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 10:35:18,137 INFO L175 Difference]: Start difference. First operand has 146 places, 175 transitions, 1719 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:35:18,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 215 transitions, 2418 flow [2024-05-12 10:35:18,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 215 transitions, 2408 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:18,373 INFO L231 Difference]: Finished difference. Result has 153 places, 185 transitions, 1985 flow [2024-05-12 10:35:18,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1985, PETRI_PLACES=153, PETRI_TRANSITIONS=185} [2024-05-12 10:35:18,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 10:35:18,374 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 185 transitions, 1985 flow [2024-05-12 10:35:18,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:18,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:18,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:35:18,374 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:18,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2055355554, now seen corresponding path program 1 times [2024-05-12 10:35:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657253516] [2024-05-12 10:35:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:18,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:18,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657253516] [2024-05-12 10:35:18,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657253516] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:18,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:18,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723762087] [2024-05-12 10:35:18,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:18,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:18,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:18,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 185 transitions, 1985 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:18,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:18,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:18,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:19,223 INFO L124 PetriNetUnfolderBase]: 2648/4390 cut-off events. [2024-05-12 10:35:19,224 INFO L125 PetriNetUnfolderBase]: For 64777/64791 co-relation queries the response was YES. [2024-05-12 10:35:19,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21538 conditions, 4390 events. 2648/4390 cut-off events. For 64777/64791 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28445 event pairs, 560 based on Foata normal form. 12/4381 useless extension candidates. Maximal degree in co-relation 21463. Up to 3743 conditions per place. [2024-05-12 10:35:19,263 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 157 selfloop transitions, 41 changer transitions 0/210 dead transitions. [2024-05-12 10:35:19,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 210 transitions, 2608 flow [2024-05-12 10:35:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-05-12 10:35:19,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-05-12 10:35:19,265 INFO L175 Difference]: Start difference. First operand has 153 places, 185 transitions, 1985 flow. Second operand 5 states and 143 transitions. [2024-05-12 10:35:19,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 210 transitions, 2608 flow [2024-05-12 10:35:19,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2562 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:19,418 INFO L231 Difference]: Finished difference. Result has 158 places, 190 transitions, 2116 flow [2024-05-12 10:35:19,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2116, PETRI_PLACES=158, PETRI_TRANSITIONS=190} [2024-05-12 10:35:19,418 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-05-12 10:35:19,419 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 190 transitions, 2116 flow [2024-05-12 10:35:19,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:19,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:19,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:19,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:35:19,419 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:19,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2017381794, now seen corresponding path program 2 times [2024-05-12 10:35:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469739507] [2024-05-12 10:35:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:19,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469739507] [2024-05-12 10:35:19,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469739507] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:19,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:19,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440462935] [2024-05-12 10:35:19,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:19,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:19,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:19,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 190 transitions, 2116 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:19,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:19,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:19,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:20,327 INFO L124 PetriNetUnfolderBase]: 2630/4305 cut-off events. [2024-05-12 10:35:20,327 INFO L125 PetriNetUnfolderBase]: For 64443/64446 co-relation queries the response was YES. [2024-05-12 10:35:20,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21537 conditions, 4305 events. 2630/4305 cut-off events. For 64443/64446 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27434 event pairs, 520 based on Foata normal form. 6/4303 useless extension candidates. Maximal degree in co-relation 21459. Up to 3723 conditions per place. [2024-05-12 10:35:20,367 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 157 selfloop transitions, 45 changer transitions 0/214 dead transitions. [2024-05-12 10:35:20,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 214 transitions, 2578 flow [2024-05-12 10:35:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 10:35:20,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:35:20,368 INFO L175 Difference]: Start difference. First operand has 158 places, 190 transitions, 2116 flow. Second operand 5 states and 150 transitions. [2024-05-12 10:35:20,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 214 transitions, 2578 flow [2024-05-12 10:35:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 214 transitions, 2499 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:20,539 INFO L231 Difference]: Finished difference. Result has 162 places, 190 transitions, 2148 flow [2024-05-12 10:35:20,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2148, PETRI_PLACES=162, PETRI_TRANSITIONS=190} [2024-05-12 10:35:20,539 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2024-05-12 10:35:20,540 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 190 transitions, 2148 flow [2024-05-12 10:35:20,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:20,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:20,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:20,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:35:20,540 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:20,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2014725802, now seen corresponding path program 1 times [2024-05-12 10:35:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:20,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702968642] [2024-05-12 10:35:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:20,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:20,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:20,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702968642] [2024-05-12 10:35:20,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702968642] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:20,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:20,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824685687] [2024-05-12 10:35:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:20,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:20,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 190 transitions, 2148 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:20,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:20,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:20,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:21,403 INFO L124 PetriNetUnfolderBase]: 2540/4166 cut-off events. [2024-05-12 10:35:21,404 INFO L125 PetriNetUnfolderBase]: For 66300/66300 co-relation queries the response was YES. [2024-05-12 10:35:21,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20970 conditions, 4166 events. 2540/4166 cut-off events. For 66300/66300 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26564 event pairs, 505 based on Foata normal form. 4/4139 useless extension candidates. Maximal degree in co-relation 20890. Up to 3682 conditions per place. [2024-05-12 10:35:21,443 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 165 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-05-12 10:35:21,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 205 transitions, 2558 flow [2024-05-12 10:35:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:35:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:35:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-05-12 10:35:21,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:35:21,445 INFO L175 Difference]: Start difference. First operand has 162 places, 190 transitions, 2148 flow. Second operand 4 states and 114 transitions. [2024-05-12 10:35:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 205 transitions, 2558 flow [2024-05-12 10:35:21,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 2459 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:21,565 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 2109 flow [2024-05-12 10:35:21,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2109, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-05-12 10:35:21,566 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-05-12 10:35:21,566 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 2109 flow [2024-05-12 10:35:21,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:21,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:21,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:21,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:35:21,566 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:21,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -289737936, now seen corresponding path program 1 times [2024-05-12 10:35:21,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:21,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503947274] [2024-05-12 10:35:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:21,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:21,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503947274] [2024-05-12 10:35:21,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503947274] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:21,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:21,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:21,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390815607] [2024-05-12 10:35:21,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:21,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:21,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:21,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:21,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 2109 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:21,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:21,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:22,459 INFO L124 PetriNetUnfolderBase]: 2631/4279 cut-off events. [2024-05-12 10:35:22,460 INFO L125 PetriNetUnfolderBase]: For 64393/64393 co-relation queries the response was YES. [2024-05-12 10:35:22,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21445 conditions, 4279 events. 2631/4279 cut-off events. For 64393/64393 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26973 event pairs, 505 based on Foata normal form. 1/4276 useless extension candidates. Maximal degree in co-relation 21365. Up to 3800 conditions per place. [2024-05-12 10:35:22,499 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 184 selfloop transitions, 41 changer transitions 0/237 dead transitions. [2024-05-12 10:35:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 237 transitions, 2789 flow [2024-05-12 10:35:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:35:22,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 10:35:22,500 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 2109 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:35:22,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 237 transitions, 2789 flow [2024-05-12 10:35:22,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2747 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:22,628 INFO L231 Difference]: Finished difference. Result has 167 places, 203 transitions, 2270 flow [2024-05-12 10:35:22,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=167, PETRI_TRANSITIONS=203} [2024-05-12 10:35:22,628 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2024-05-12 10:35:22,628 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 203 transitions, 2270 flow [2024-05-12 10:35:22,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:22,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:22,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:22,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:35:22,629 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:22,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1436572186, now seen corresponding path program 2 times [2024-05-12 10:35:22,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:22,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547748121] [2024-05-12 10:35:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:22,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:22,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547748121] [2024-05-12 10:35:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547748121] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:22,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:22,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:22,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323919141] [2024-05-12 10:35:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:23,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:23,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 203 transitions, 2270 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:23,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:23,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:23,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:23,568 INFO L124 PetriNetUnfolderBase]: 2656/4464 cut-off events. [2024-05-12 10:35:23,568 INFO L125 PetriNetUnfolderBase]: For 70737/70737 co-relation queries the response was YES. [2024-05-12 10:35:23,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22393 conditions, 4464 events. 2656/4464 cut-off events. For 70737/70737 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29172 event pairs, 925 based on Foata normal form. 1/4424 useless extension candidates. Maximal degree in co-relation 22311. Up to 3827 conditions per place. [2024-05-12 10:35:23,610 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 182 selfloop transitions, 45 changer transitions 0/239 dead transitions. [2024-05-12 10:35:23,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 3001 flow [2024-05-12 10:35:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:35:23,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:35:23,611 INFO L175 Difference]: Start difference. First operand has 167 places, 203 transitions, 2270 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:35:23,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 3001 flow [2024-05-12 10:35:23,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 239 transitions, 2957 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:23,796 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2397 flow [2024-05-12 10:35:23,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2397, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-05-12 10:35:23,797 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-05-12 10:35:23,797 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2397 flow [2024-05-12 10:35:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:23,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:23,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:35:23,797 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:23,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -280472346, now seen corresponding path program 3 times [2024-05-12 10:35:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:23,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866731288] [2024-05-12 10:35:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:23,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866731288] [2024-05-12 10:35:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866731288] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441889224] [2024-05-12 10:35:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:24,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:24,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:24,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2397 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:24,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:24,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:24,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:24,666 INFO L124 PetriNetUnfolderBase]: 2653/4317 cut-off events. [2024-05-12 10:35:24,666 INFO L125 PetriNetUnfolderBase]: For 72258/72258 co-relation queries the response was YES. [2024-05-12 10:35:24,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22367 conditions, 4317 events. 2653/4317 cut-off events. For 72258/72258 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27217 event pairs, 505 based on Foata normal form. 1/4314 useless extension candidates. Maximal degree in co-relation 22283. Up to 3824 conditions per place. [2024-05-12 10:35:24,707 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 180 selfloop transitions, 46 changer transitions 0/238 dead transitions. [2024-05-12 10:35:24,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 238 transitions, 2983 flow [2024-05-12 10:35:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 10:35:24,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:35:24,708 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2397 flow. Second operand 7 states and 189 transitions. [2024-05-12 10:35:24,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 238 transitions, 2983 flow [2024-05-12 10:35:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 238 transitions, 2904 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:24,842 INFO L231 Difference]: Finished difference. Result has 177 places, 210 transitions, 2416 flow [2024-05-12 10:35:24,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2416, PETRI_PLACES=177, PETRI_TRANSITIONS=210} [2024-05-12 10:35:24,842 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-05-12 10:35:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 210 transitions, 2416 flow [2024-05-12 10:35:24,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:24,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:24,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:35:24,843 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:24,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1954650876, now seen corresponding path program 4 times [2024-05-12 10:35:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288693045] [2024-05-12 10:35:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:25,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288693045] [2024-05-12 10:35:25,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288693045] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:25,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811503877] [2024-05-12 10:35:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:25,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:25,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:25,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 210 transitions, 2416 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:25,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:25,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:25,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:25,900 INFO L124 PetriNetUnfolderBase]: 2664/4422 cut-off events. [2024-05-12 10:35:25,900 INFO L125 PetriNetUnfolderBase]: For 77097/77097 co-relation queries the response was YES. [2024-05-12 10:35:25,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22625 conditions, 4422 events. 2664/4422 cut-off events. For 77097/77097 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28442 event pairs, 651 based on Foata normal form. 1/4416 useless extension candidates. Maximal degree in co-relation 22540. Up to 3885 conditions per place. [2024-05-12 10:35:25,947 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 198 selfloop transitions, 34 changer transitions 0/244 dead transitions. [2024-05-12 10:35:25,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 3065 flow [2024-05-12 10:35:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:35:25,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:35:25,948 INFO L175 Difference]: Start difference. First operand has 177 places, 210 transitions, 2416 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:35:25,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 3065 flow [2024-05-12 10:35:26,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 2969 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:26,147 INFO L231 Difference]: Finished difference. Result has 178 places, 213 transitions, 2433 flow [2024-05-12 10:35:26,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2433, PETRI_PLACES=178, PETRI_TRANSITIONS=213} [2024-05-12 10:35:26,148 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 128 predicate places. [2024-05-12 10:35:26,148 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 213 transitions, 2433 flow [2024-05-12 10:35:26,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:26,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:26,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:26,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:35:26,149 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:26,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1954662036, now seen corresponding path program 5 times [2024-05-12 10:35:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:26,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439599347] [2024-05-12 10:35:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:26,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:26,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439599347] [2024-05-12 10:35:26,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439599347] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:26,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:26,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879961353] [2024-05-12 10:35:26,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:26,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:26,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 213 transitions, 2433 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:26,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:26,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:26,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:27,107 INFO L124 PetriNetUnfolderBase]: 2661/4352 cut-off events. [2024-05-12 10:35:27,108 INFO L125 PetriNetUnfolderBase]: For 79225/79225 co-relation queries the response was YES. [2024-05-12 10:35:27,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22545 conditions, 4352 events. 2661/4352 cut-off events. For 79225/79225 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27571 event pairs, 645 based on Foata normal form. 1/4340 useless extension candidates. Maximal degree in co-relation 22459. Up to 3882 conditions per place. [2024-05-12 10:35:27,149 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 193 selfloop transitions, 32 changer transitions 0/237 dead transitions. [2024-05-12 10:35:27,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 237 transitions, 2939 flow [2024-05-12 10:35:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:35:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:35:27,151 INFO L175 Difference]: Start difference. First operand has 178 places, 213 transitions, 2433 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:35:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 237 transitions, 2939 flow [2024-05-12 10:35:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 237 transitions, 2831 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:27,345 INFO L231 Difference]: Finished difference. Result has 180 places, 213 transitions, 2395 flow [2024-05-12 10:35:27,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2395, PETRI_PLACES=180, PETRI_TRANSITIONS=213} [2024-05-12 10:35:27,346 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-05-12 10:35:27,346 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 213 transitions, 2395 flow [2024-05-12 10:35:27,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:27,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:27,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:27,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:35:27,347 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:27,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1660278718, now seen corresponding path program 1 times [2024-05-12 10:35:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:27,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309713711] [2024-05-12 10:35:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309713711] [2024-05-12 10:35:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309713711] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:27,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:27,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278401046] [2024-05-12 10:35:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:27,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:27,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 213 transitions, 2395 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:27,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:27,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:27,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:28,271 INFO L124 PetriNetUnfolderBase]: 2669/4419 cut-off events. [2024-05-12 10:35:28,272 INFO L125 PetriNetUnfolderBase]: For 84667/84681 co-relation queries the response was YES. [2024-05-12 10:35:28,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22691 conditions, 4419 events. 2669/4419 cut-off events. For 84667/84681 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28598 event pairs, 594 based on Foata normal form. 12/4400 useless extension candidates. Maximal degree in co-relation 22604. Up to 3598 conditions per place. [2024-05-12 10:35:28,314 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 153 selfloop transitions, 74 changer transitions 0/239 dead transitions. [2024-05-12 10:35:28,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 239 transitions, 3098 flow [2024-05-12 10:35:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 10:35:28,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:35:28,316 INFO L175 Difference]: Start difference. First operand has 180 places, 213 transitions, 2395 flow. Second operand 6 states and 168 transitions. [2024-05-12 10:35:28,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 239 transitions, 3098 flow [2024-05-12 10:35:28,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 239 transitions, 2992 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:28,518 INFO L231 Difference]: Finished difference. Result has 181 places, 216 transitions, 2489 flow [2024-05-12 10:35:28,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2489, PETRI_PLACES=181, PETRI_TRANSITIONS=216} [2024-05-12 10:35:28,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 10:35:28,518 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 216 transitions, 2489 flow [2024-05-12 10:35:28,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:28,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:28,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:28,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:35:28,519 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:28,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1885674946, now seen corresponding path program 2 times [2024-05-12 10:35:28,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:28,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272157749] [2024-05-12 10:35:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:28,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272157749] [2024-05-12 10:35:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272157749] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947185741] [2024-05-12 10:35:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:28,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 216 transitions, 2489 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:28,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:28,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:28,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:29,457 INFO L124 PetriNetUnfolderBase]: 2677/4419 cut-off events. [2024-05-12 10:35:29,457 INFO L125 PetriNetUnfolderBase]: For 87432/87435 co-relation queries the response was YES. [2024-05-12 10:35:29,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23007 conditions, 4419 events. 2677/4419 cut-off events. For 87432/87435 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28506 event pairs, 522 based on Foata normal form. 4/4406 useless extension candidates. Maximal degree in co-relation 22920. Up to 3732 conditions per place. [2024-05-12 10:35:29,502 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 177 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-05-12 10:35:29,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 248 transitions, 3239 flow [2024-05-12 10:35:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:35:29,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:35:29,503 INFO L175 Difference]: Start difference. First operand has 181 places, 216 transitions, 2489 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:35:29,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 248 transitions, 3239 flow [2024-05-12 10:35:29,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 248 transitions, 3038 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:29,724 INFO L231 Difference]: Finished difference. Result has 183 places, 219 transitions, 2467 flow [2024-05-12 10:35:29,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2467, PETRI_PLACES=183, PETRI_TRANSITIONS=219} [2024-05-12 10:35:29,725 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-05-12 10:35:29,725 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 219 transitions, 2467 flow [2024-05-12 10:35:29,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:29,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:29,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:35:29,728 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:29,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -397662129, now seen corresponding path program 1 times [2024-05-12 10:35:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465587721] [2024-05-12 10:35:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:30,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:30,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465587721] [2024-05-12 10:35:30,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465587721] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:30,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:30,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591040702] [2024-05-12 10:35:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:30,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:30,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:30,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:30,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 219 transitions, 2467 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:30,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:30,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:30,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:30,715 INFO L124 PetriNetUnfolderBase]: 2716/4455 cut-off events. [2024-05-12 10:35:30,717 INFO L125 PetriNetUnfolderBase]: For 89585/89585 co-relation queries the response was YES. [2024-05-12 10:35:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23287 conditions, 4455 events. 2716/4455 cut-off events. For 89585/89585 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28531 event pairs, 553 based on Foata normal form. 1/4435 useless extension candidates. Maximal degree in co-relation 23200. Up to 3593 conditions per place. [2024-05-12 10:35:30,759 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 184 selfloop transitions, 76 changer transitions 0/272 dead transitions. [2024-05-12 10:35:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 272 transitions, 3541 flow [2024-05-12 10:35:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:35:30,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 10:35:30,761 INFO L175 Difference]: Start difference. First operand has 183 places, 219 transitions, 2467 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:35:30,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 272 transitions, 3541 flow [2024-05-12 10:35:30,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 3393 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:30,969 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 2625 flow [2024-05-12 10:35:30,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2625, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-05-12 10:35:30,971 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 136 predicate places. [2024-05-12 10:35:30,971 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 2625 flow [2024-05-12 10:35:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:30,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:35:30,972 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:30,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1297170691, now seen corresponding path program 2 times [2024-05-12 10:35:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766814770] [2024-05-12 10:35:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:31,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766814770] [2024-05-12 10:35:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766814770] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:31,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:31,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:31,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935908090] [2024-05-12 10:35:31,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:31,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:31,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:31,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 2625 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:31,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:31,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:31,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:31,928 INFO L124 PetriNetUnfolderBase]: 2755/4538 cut-off events. [2024-05-12 10:35:31,928 INFO L125 PetriNetUnfolderBase]: For 98927/98927 co-relation queries the response was YES. [2024-05-12 10:35:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24363 conditions, 4538 events. 2755/4538 cut-off events. For 98927/98927 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29401 event pairs, 548 based on Foata normal form. 1/4516 useless extension candidates. Maximal degree in co-relation 24275. Up to 3626 conditions per place. [2024-05-12 10:35:31,969 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 83 changer transitions 0/276 dead transitions. [2024-05-12 10:35:31,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 276 transitions, 3659 flow [2024-05-12 10:35:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:31,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:31,970 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 2625 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:31,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 276 transitions, 3659 flow [2024-05-12 10:35:32,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 276 transitions, 3555 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:32,213 INFO L231 Difference]: Finished difference. Result has 192 places, 239 transitions, 2785 flow [2024-05-12 10:35:32,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2785, PETRI_PLACES=192, PETRI_TRANSITIONS=239} [2024-05-12 10:35:32,214 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 142 predicate places. [2024-05-12 10:35:32,214 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 239 transitions, 2785 flow [2024-05-12 10:35:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:32,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:32,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:35:32,215 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:32,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1288596835, now seen corresponding path program 1 times [2024-05-12 10:35:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702833871] [2024-05-12 10:35:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:32,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702833871] [2024-05-12 10:35:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702833871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:32,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:32,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243020858] [2024-05-12 10:35:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:32,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:32,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:32,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 239 transitions, 2785 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:32,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:33,296 INFO L124 PetriNetUnfolderBase]: 2773/4632 cut-off events. [2024-05-12 10:35:33,296 INFO L125 PetriNetUnfolderBase]: For 103021/103021 co-relation queries the response was YES. [2024-05-12 10:35:33,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24923 conditions, 4632 events. 2773/4632 cut-off events. For 103021/103021 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30268 event pairs, 789 based on Foata normal form. 2/4593 useless extension candidates. Maximal degree in co-relation 24832. Up to 3976 conditions per place. [2024-05-12 10:35:33,337 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 239 selfloop transitions, 31 changer transitions 0/282 dead transitions. [2024-05-12 10:35:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 282 transitions, 3533 flow [2024-05-12 10:35:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:35:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:35:33,339 INFO L175 Difference]: Start difference. First operand has 192 places, 239 transitions, 2785 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:35:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 282 transitions, 3533 flow [2024-05-12 10:35:33,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 282 transitions, 3392 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:33,560 INFO L231 Difference]: Finished difference. Result has 196 places, 243 transitions, 2747 flow [2024-05-12 10:35:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=196, PETRI_TRANSITIONS=243} [2024-05-12 10:35:33,561 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-05-12 10:35:33,561 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 243 transitions, 2747 flow [2024-05-12 10:35:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:33,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:33,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:33,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:35:33,562 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:33,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1297167715, now seen corresponding path program 2 times [2024-05-12 10:35:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426502990] [2024-05-12 10:35:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:33,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:33,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426502990] [2024-05-12 10:35:33,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426502990] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:33,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:33,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136800328] [2024-05-12 10:35:33,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:33,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:33,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:33,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 243 transitions, 2747 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:33,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:34,551 INFO L124 PetriNetUnfolderBase]: 2791/4690 cut-off events. [2024-05-12 10:35:34,552 INFO L125 PetriNetUnfolderBase]: For 107593/107593 co-relation queries the response was YES. [2024-05-12 10:35:34,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25011 conditions, 4690 events. 2791/4690 cut-off events. For 107593/107593 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30941 event pairs, 934 based on Foata normal form. 2/4653 useless extension candidates. Maximal degree in co-relation 24919. Up to 4069 conditions per place. [2024-05-12 10:35:34,598 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 239 selfloop transitions, 28 changer transitions 0/279 dead transitions. [2024-05-12 10:35:34,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 279 transitions, 3381 flow [2024-05-12 10:35:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:35:34,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:35:34,599 INFO L175 Difference]: Start difference. First operand has 196 places, 243 transitions, 2747 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:35:34,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 279 transitions, 3381 flow [2024-05-12 10:35:34,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 279 transitions, 3319 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:34,822 INFO L231 Difference]: Finished difference. Result has 200 places, 245 transitions, 2770 flow [2024-05-12 10:35:34,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2770, PETRI_PLACES=200, PETRI_TRANSITIONS=245} [2024-05-12 10:35:34,822 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-05-12 10:35:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 245 transitions, 2770 flow [2024-05-12 10:35:34,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:34,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:34,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:34,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:35:34,823 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:34,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1406747941, now seen corresponding path program 3 times [2024-05-12 10:35:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:34,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930360463] [2024-05-12 10:35:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930360463] [2024-05-12 10:35:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930360463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:35,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072861799] [2024-05-12 10:35:35,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:35,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:35,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 245 transitions, 2770 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:35,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:35,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:35,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:35,817 INFO L124 PetriNetUnfolderBase]: 2838/4632 cut-off events. [2024-05-12 10:35:35,817 INFO L125 PetriNetUnfolderBase]: For 111390/111390 co-relation queries the response was YES. [2024-05-12 10:35:35,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 4632 events. 2838/4632 cut-off events. For 111390/111390 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29807 event pairs, 531 based on Foata normal form. 1/4620 useless extension candidates. Maximal degree in co-relation 25368. Up to 3961 conditions per place. [2024-05-12 10:35:35,862 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 221 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-05-12 10:35:35,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 293 transitions, 3842 flow [2024-05-12 10:35:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:35:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:35:35,863 INFO L175 Difference]: Start difference. First operand has 200 places, 245 transitions, 2770 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:35:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 293 transitions, 3842 flow [2024-05-12 10:35:36,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 293 transitions, 3787 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:36,144 INFO L231 Difference]: Finished difference. Result has 203 places, 257 transitions, 3024 flow [2024-05-12 10:35:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3024, PETRI_PLACES=203, PETRI_TRANSITIONS=257} [2024-05-12 10:35:36,144 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-05-12 10:35:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 257 transitions, 3024 flow [2024-05-12 10:35:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:36,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:35:36,145 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:36,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 638451959, now seen corresponding path program 1 times [2024-05-12 10:35:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:36,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997563617] [2024-05-12 10:35:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:36,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997563617] [2024-05-12 10:35:36,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997563617] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:36,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:36,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:36,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126625691] [2024-05-12 10:35:36,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:36,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:36,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:36,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 257 transitions, 3024 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:36,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:36,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:36,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:37,177 INFO L124 PetriNetUnfolderBase]: 2860/4666 cut-off events. [2024-05-12 10:35:37,177 INFO L125 PetriNetUnfolderBase]: For 116722/116722 co-relation queries the response was YES. [2024-05-12 10:35:37,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26084 conditions, 4666 events. 2860/4666 cut-off events. For 116722/116722 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30053 event pairs, 531 based on Foata normal form. 1/4654 useless extension candidates. Maximal degree in co-relation 25988. Up to 4013 conditions per place. [2024-05-12 10:35:37,227 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 225 selfloop transitions, 58 changer transitions 0/295 dead transitions. [2024-05-12 10:35:37,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 295 transitions, 3935 flow [2024-05-12 10:35:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:35:37,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 10:35:37,228 INFO L175 Difference]: Start difference. First operand has 203 places, 257 transitions, 3024 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:35:37,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 295 transitions, 3935 flow [2024-05-12 10:35:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 3826 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:37,527 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3128 flow [2024-05-12 10:35:37,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3128, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-05-12 10:35:37,528 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2024-05-12 10:35:37,528 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3128 flow [2024-05-12 10:35:37,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:37,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:37,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:37,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:35:37,528 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:37,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -282072429, now seen corresponding path program 4 times [2024-05-12 10:35:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489106530] [2024-05-12 10:35:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489106530] [2024-05-12 10:35:37,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489106530] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:37,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:37,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997823249] [2024-05-12 10:35:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:37,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:37,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3128 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:37,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:37,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:37,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:38,583 INFO L124 PetriNetUnfolderBase]: 2871/4688 cut-off events. [2024-05-12 10:35:38,584 INFO L125 PetriNetUnfolderBase]: For 121199/121199 co-relation queries the response was YES. [2024-05-12 10:35:38,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 4688 events. 2871/4688 cut-off events. For 121199/121199 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30208 event pairs, 534 based on Foata normal form. 1/4676 useless extension candidates. Maximal degree in co-relation 26152. Up to 3989 conditions per place. [2024-05-12 10:35:38,628 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 226 selfloop transitions, 70 changer transitions 0/308 dead transitions. [2024-05-12 10:35:38,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 308 transitions, 4129 flow [2024-05-12 10:35:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-05-12 10:35:38,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:35:38,652 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3128 flow. Second operand 9 states and 243 transitions. [2024-05-12 10:35:38,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 308 transitions, 4129 flow [2024-05-12 10:35:39,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 308 transitions, 4030 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:39,081 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 3212 flow [2024-05-12 10:35:39,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3212, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-05-12 10:35:39,082 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 10:35:39,082 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 3212 flow [2024-05-12 10:35:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:39,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:39,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:39,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:35:39,083 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:39,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash -104945559, now seen corresponding path program 5 times [2024-05-12 10:35:39,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:39,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165890432] [2024-05-12 10:35:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:39,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:39,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165890432] [2024-05-12 10:35:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165890432] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:39,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:39,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:39,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632782936] [2024-05-12 10:35:39,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:39,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:39,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:39,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:39,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 3212 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:39,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:39,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:39,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:40,186 INFO L124 PetriNetUnfolderBase]: 2924/4798 cut-off events. [2024-05-12 10:35:40,186 INFO L125 PetriNetUnfolderBase]: For 132112/132112 co-relation queries the response was YES. [2024-05-12 10:35:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27025 conditions, 4798 events. 2924/4798 cut-off events. For 132112/132112 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31270 event pairs, 562 based on Foata normal form. 1/4771 useless extension candidates. Maximal degree in co-relation 26927. Up to 3767 conditions per place. [2024-05-12 10:35:40,239 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 186 selfloop transitions, 109 changer transitions 0/307 dead transitions. [2024-05-12 10:35:40,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 307 transitions, 4372 flow [2024-05-12 10:35:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:35:40,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:35:40,241 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 3212 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:35:40,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 307 transitions, 4372 flow [2024-05-12 10:35:40,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 307 transitions, 4210 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:40,745 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3398 flow [2024-05-12 10:35:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3398, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-05-12 10:35:40,745 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 10:35:40,745 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3398 flow [2024-05-12 10:35:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:35:40,746 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:40,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash -104940909, now seen corresponding path program 6 times [2024-05-12 10:35:40,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:40,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658524266] [2024-05-12 10:35:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:41,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658524266] [2024-05-12 10:35:41,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658524266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:41,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:41,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959707471] [2024-05-12 10:35:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:41,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:41,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:41,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3398 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:41,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:41,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:41,826 INFO L124 PetriNetUnfolderBase]: 2921/4790 cut-off events. [2024-05-12 10:35:41,827 INFO L125 PetriNetUnfolderBase]: For 136054/136054 co-relation queries the response was YES. [2024-05-12 10:35:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27240 conditions, 4790 events. 2921/4790 cut-off events. For 136054/136054 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31156 event pairs, 529 based on Foata normal form. 1/4771 useless extension candidates. Maximal degree in co-relation 27141. Up to 4089 conditions per place. [2024-05-12 10:35:41,876 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 61 changer transitions 0/305 dead transitions. [2024-05-12 10:35:41,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 305 transitions, 4242 flow [2024-05-12 10:35:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 10:35:41,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-05-12 10:35:41,878 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3398 flow. Second operand 7 states and 192 transitions. [2024-05-12 10:35:41,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 305 transitions, 4242 flow [2024-05-12 10:35:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 305 transitions, 4060 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:42,355 INFO L231 Difference]: Finished difference. Result has 218 places, 276 transitions, 3344 flow [2024-05-12 10:35:42,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3344, PETRI_PLACES=218, PETRI_TRANSITIONS=276} [2024-05-12 10:35:42,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-05-12 10:35:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 276 transitions, 3344 flow [2024-05-12 10:35:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:42,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:35:42,356 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:42,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -649750651, now seen corresponding path program 2 times [2024-05-12 10:35:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015824613] [2024-05-12 10:35:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015824613] [2024-05-12 10:35:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015824613] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:42,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:42,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757827789] [2024-05-12 10:35:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:42,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:42,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 276 transitions, 3344 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:42,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:42,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:42,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:43,374 INFO L124 PetriNetUnfolderBase]: 2932/4777 cut-off events. [2024-05-12 10:35:43,375 INFO L125 PetriNetUnfolderBase]: For 138262/138262 co-relation queries the response was YES. [2024-05-12 10:35:43,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27162 conditions, 4777 events. 2932/4777 cut-off events. For 138262/138262 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30857 event pairs, 528 based on Foata normal form. 1/4765 useless extension candidates. Maximal degree in co-relation 27062. Up to 4108 conditions per place. [2024-05-12 10:35:43,425 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 238 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-05-12 10:35:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 311 transitions, 4258 flow [2024-05-12 10:35:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:35:43,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:35:43,426 INFO L175 Difference]: Start difference. First operand has 218 places, 276 transitions, 3344 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:35:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 311 transitions, 4258 flow [2024-05-12 10:35:43,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 311 transitions, 4154 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:43,993 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3416 flow [2024-05-12 10:35:43,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3416, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-05-12 10:35:43,994 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-05-12 10:35:43,994 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3416 flow [2024-05-12 10:35:43,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:43,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:43,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:43,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:35:43,994 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:43,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1584055045, now seen corresponding path program 3 times [2024-05-12 10:35:43,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223602307] [2024-05-12 10:35:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:44,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223602307] [2024-05-12 10:35:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223602307] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:44,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535331910] [2024-05-12 10:35:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:44,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:44,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3416 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:44,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:44,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:44,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:45,065 INFO L124 PetriNetUnfolderBase]: 2950/4948 cut-off events. [2024-05-12 10:35:45,066 INFO L125 PetriNetUnfolderBase]: For 144994/144994 co-relation queries the response was YES. [2024-05-12 10:35:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 4948 events. 2950/4948 cut-off events. For 144994/144994 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32871 event pairs, 953 based on Foata normal form. 2/4909 useless extension candidates. Maximal degree in co-relation 27422. Up to 4287 conditions per place. [2024-05-12 10:35:45,122 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 270 selfloop transitions, 27 changer transitions 0/309 dead transitions. [2024-05-12 10:35:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 309 transitions, 4088 flow [2024-05-12 10:35:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 10:35:45,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2024-05-12 10:35:45,123 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3416 flow. Second operand 7 states and 185 transitions. [2024-05-12 10:35:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 309 transitions, 4088 flow [2024-05-12 10:35:45,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 309 transitions, 3926 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:45,613 INFO L231 Difference]: Finished difference. Result has 224 places, 281 transitions, 3331 flow [2024-05-12 10:35:45,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3331, PETRI_PLACES=224, PETRI_TRANSITIONS=281} [2024-05-12 10:35:45,614 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-05-12 10:35:45,614 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 281 transitions, 3331 flow [2024-05-12 10:35:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:45,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:45,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:45,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:35:45,614 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:45,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash -104694459, now seen corresponding path program 1 times [2024-05-12 10:35:45,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:45,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882831657] [2024-05-12 10:35:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882831657] [2024-05-12 10:35:45,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882831657] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:45,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:45,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363934497] [2024-05-12 10:35:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:46,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 281 transitions, 3331 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:46,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:46,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:46,670 INFO L124 PetriNetUnfolderBase]: 2957/4887 cut-off events. [2024-05-12 10:35:46,671 INFO L125 PetriNetUnfolderBase]: For 166639/166654 co-relation queries the response was YES. [2024-05-12 10:35:46,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27294 conditions, 4887 events. 2957/4887 cut-off events. For 166639/166654 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32458 event pairs, 552 based on Foata normal form. 27/4867 useless extension candidates. Maximal degree in co-relation 27192. Up to 3794 conditions per place. [2024-05-12 10:35:46,723 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 182 selfloop transitions, 97 changer transitions 0/316 dead transitions. [2024-05-12 10:35:46,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 316 transitions, 4217 flow [2024-05-12 10:35:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 10:35:46,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 10:35:46,725 INFO L175 Difference]: Start difference. First operand has 224 places, 281 transitions, 3331 flow. Second operand 7 states and 201 transitions. [2024-05-12 10:35:46,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 316 transitions, 4217 flow [2024-05-12 10:35:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 316 transitions, 4166 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:47,278 INFO L231 Difference]: Finished difference. Result has 227 places, 283 transitions, 3517 flow [2024-05-12 10:35:47,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3517, PETRI_PLACES=227, PETRI_TRANSITIONS=283} [2024-05-12 10:35:47,278 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-05-12 10:35:47,278 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 283 transitions, 3517 flow [2024-05-12 10:35:47,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:47,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:47,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:35:47,279 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:47,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1426750335, now seen corresponding path program 3 times [2024-05-12 10:35:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726703557] [2024-05-12 10:35:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:47,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:47,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726703557] [2024-05-12 10:35:47,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726703557] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:47,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373949886] [2024-05-12 10:35:47,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:47,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:47,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:47,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:47,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:47,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 283 transitions, 3517 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:47,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:48,341 INFO L124 PetriNetUnfolderBase]: 3047/4988 cut-off events. [2024-05-12 10:35:48,341 INFO L125 PetriNetUnfolderBase]: For 158675/158689 co-relation queries the response was YES. [2024-05-12 10:35:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28580 conditions, 4988 events. 3047/4988 cut-off events. For 158675/158689 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32675 event pairs, 566 based on Foata normal form. 11/4970 useless extension candidates. Maximal degree in co-relation 28476. Up to 4279 conditions per place. [2024-05-12 10:35:48,394 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 237 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-05-12 10:35:48,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 4257 flow [2024-05-12 10:35:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 10:35:48,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:35:48,396 INFO L175 Difference]: Start difference. First operand has 227 places, 283 transitions, 3517 flow. Second operand 6 states and 164 transitions. [2024-05-12 10:35:48,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 4257 flow [2024-05-12 10:35:48,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 305 transitions, 4054 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:48,873 INFO L231 Difference]: Finished difference. Result has 228 places, 283 transitions, 3432 flow [2024-05-12 10:35:48,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3432, PETRI_PLACES=228, PETRI_TRANSITIONS=283} [2024-05-12 10:35:48,874 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 178 predicate places. [2024-05-12 10:35:48,874 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 283 transitions, 3432 flow [2024-05-12 10:35:48,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:48,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:48,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:48,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:35:48,875 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:48,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash 304922469, now seen corresponding path program 7 times [2024-05-12 10:35:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706553089] [2024-05-12 10:35:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:48,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706553089] [2024-05-12 10:35:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706553089] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470790265] [2024-05-12 10:35:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:49,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:49,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 283 transitions, 3432 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:49,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:49,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:49,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:49,939 INFO L124 PetriNetUnfolderBase]: 3055/4994 cut-off events. [2024-05-12 10:35:49,939 INFO L125 PetriNetUnfolderBase]: For 161328/161328 co-relation queries the response was YES. [2024-05-12 10:35:49,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28276 conditions, 4994 events. 3055/4994 cut-off events. For 161328/161328 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32718 event pairs, 548 based on Foata normal form. 2/4978 useless extension candidates. Maximal degree in co-relation 28171. Up to 4035 conditions per place. [2024-05-12 10:35:49,992 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 206 selfloop transitions, 107 changer transitions 0/325 dead transitions. [2024-05-12 10:35:49,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 325 transitions, 4502 flow [2024-05-12 10:35:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:35:49,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 10:35:49,993 INFO L175 Difference]: Start difference. First operand has 228 places, 283 transitions, 3432 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:35:49,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 325 transitions, 4502 flow [2024-05-12 10:35:50,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 325 transitions, 4368 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:50,467 INFO L231 Difference]: Finished difference. Result has 232 places, 286 transitions, 3589 flow [2024-05-12 10:35:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3589, PETRI_PLACES=232, PETRI_TRANSITIONS=286} [2024-05-12 10:35:50,468 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-05-12 10:35:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 286 transitions, 3589 flow [2024-05-12 10:35:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:50,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:35:50,469 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:50,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 255696423, now seen corresponding path program 4 times [2024-05-12 10:35:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899464629] [2024-05-12 10:35:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:50,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:50,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:50,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899464629] [2024-05-12 10:35:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899464629] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:50,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:50,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549049047] [2024-05-12 10:35:50,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:50,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:50,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:50,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:50,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:50,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 286 transitions, 3589 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:50,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:50,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:50,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:51,574 INFO L124 PetriNetUnfolderBase]: 3052/4982 cut-off events. [2024-05-12 10:35:51,575 INFO L125 PetriNetUnfolderBase]: For 164620/164620 co-relation queries the response was YES. [2024-05-12 10:35:51,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28634 conditions, 4982 events. 3052/4982 cut-off events. For 164620/164620 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32573 event pairs, 535 based on Foata normal form. 1/4963 useless extension candidates. Maximal degree in co-relation 28527. Up to 4287 conditions per place. [2024-05-12 10:35:51,628 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 238 selfloop transitions, 60 changer transitions 0/310 dead transitions. [2024-05-12 10:35:51,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 310 transitions, 4241 flow [2024-05-12 10:35:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 10:35:51,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:35:51,630 INFO L175 Difference]: Start difference. First operand has 232 places, 286 transitions, 3589 flow. Second operand 6 states and 168 transitions. [2024-05-12 10:35:51,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 310 transitions, 4241 flow [2024-05-12 10:35:52,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 310 transitions, 4014 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:52,113 INFO L231 Difference]: Finished difference. Result has 232 places, 286 transitions, 3496 flow [2024-05-12 10:35:52,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3496, PETRI_PLACES=232, PETRI_TRANSITIONS=286} [2024-05-12 10:35:52,114 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-05-12 10:35:52,114 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 286 transitions, 3496 flow [2024-05-12 10:35:52,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:52,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:52,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:52,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:35:52,115 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:52,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:52,115 INFO L85 PathProgramCache]: Analyzing trace with hash 249081543, now seen corresponding path program 8 times [2024-05-12 10:35:52,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:52,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708852736] [2024-05-12 10:35:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:52,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:52,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:52,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708852736] [2024-05-12 10:35:52,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708852736] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:52,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:52,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107364173] [2024-05-12 10:35:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:52,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:52,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 286 transitions, 3496 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:52,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:52,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:53,208 INFO L124 PetriNetUnfolderBase]: 3046/4959 cut-off events. [2024-05-12 10:35:53,208 INFO L125 PetriNetUnfolderBase]: For 154941/154941 co-relation queries the response was YES. [2024-05-12 10:35:53,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28160 conditions, 4959 events. 3046/4959 cut-off events. For 154941/154941 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32172 event pairs, 545 based on Foata normal form. 2/4950 useless extension candidates. Maximal degree in co-relation 28053. Up to 4028 conditions per place. [2024-05-12 10:35:53,263 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 208 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2024-05-12 10:35:53,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4446 flow [2024-05-12 10:35:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:35:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-05-12 10:35:53,265 INFO L175 Difference]: Start difference. First operand has 232 places, 286 transitions, 3496 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:35:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4446 flow [2024-05-12 10:35:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 330 transitions, 4296 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:53,692 INFO L231 Difference]: Finished difference. Result has 234 places, 286 transitions, 3593 flow [2024-05-12 10:35:53,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3593, PETRI_PLACES=234, PETRI_TRANSITIONS=286} [2024-05-12 10:35:53,693 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 184 predicate places. [2024-05-12 10:35:53,693 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 286 transitions, 3593 flow [2024-05-12 10:35:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:53,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:53,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:35:53,693 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:53,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1673868891, now seen corresponding path program 9 times [2024-05-12 10:35:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569509887] [2024-05-12 10:35:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:54,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:54,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569509887] [2024-05-12 10:35:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569509887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:54,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687104069] [2024-05-12 10:35:54,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:54,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:54,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:54,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 286 transitions, 3593 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:54,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:54,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:54,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:54,774 INFO L124 PetriNetUnfolderBase]: 3188/5175 cut-off events. [2024-05-12 10:35:54,774 INFO L125 PetriNetUnfolderBase]: For 155352/155355 co-relation queries the response was YES. [2024-05-12 10:35:54,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29885 conditions, 5175 events. 3188/5175 cut-off events. For 155352/155355 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33713 event pairs, 518 based on Foata normal form. 6/5173 useless extension candidates. Maximal degree in co-relation 29779. Up to 4393 conditions per place. [2024-05-12 10:35:54,828 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 264 selfloop transitions, 75 changer transitions 0/351 dead transitions. [2024-05-12 10:35:54,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 351 transitions, 4910 flow [2024-05-12 10:35:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-05-12 10:35:54,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 10:35:54,829 INFO L175 Difference]: Start difference. First operand has 234 places, 286 transitions, 3593 flow. Second operand 6 states and 184 transitions. [2024-05-12 10:35:54,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 351 transitions, 4910 flow [2024-05-12 10:35:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 351 transitions, 4619 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-05-12 10:35:55,315 INFO L231 Difference]: Finished difference. Result has 231 places, 314 transitions, 3992 flow [2024-05-12 10:35:55,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3992, PETRI_PLACES=231, PETRI_TRANSITIONS=314} [2024-05-12 10:35:55,315 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 181 predicate places. [2024-05-12 10:35:55,315 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 314 transitions, 3992 flow [2024-05-12 10:35:55,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:55,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:55,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:55,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:35:55,316 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:55,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash -397694209, now seen corresponding path program 10 times [2024-05-12 10:35:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:55,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043693767] [2024-05-12 10:35:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043693767] [2024-05-12 10:35:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043693767] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:55,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:55,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:55,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593440403] [2024-05-12 10:35:55,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:55,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:55,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:55,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 314 transitions, 3992 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:55,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:55,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:55,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:56,579 INFO L124 PetriNetUnfolderBase]: 3196/5190 cut-off events. [2024-05-12 10:35:56,579 INFO L125 PetriNetUnfolderBase]: For 145319/145325 co-relation queries the response was YES. [2024-05-12 10:35:56,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30479 conditions, 5190 events. 3196/5190 cut-off events. For 145319/145325 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33934 event pairs, 518 based on Foata normal form. 6/5188 useless extension candidates. Maximal degree in co-relation 30373. Up to 4460 conditions per place. [2024-05-12 10:35:56,640 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 272 selfloop transitions, 69 changer transitions 0/353 dead transitions. [2024-05-12 10:35:56,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 353 transitions, 4810 flow [2024-05-12 10:35:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:56,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:56,642 INFO L175 Difference]: Start difference. First operand has 231 places, 314 transitions, 3992 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 353 transitions, 4810 flow [2024-05-12 10:35:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 353 transitions, 4734 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:57,184 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 4124 flow [2024-05-12 10:35:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4124, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-05-12 10:35:57,185 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-05-12 10:35:57,185 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 4124 flow [2024-05-12 10:35:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:35:57,185 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:57,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash -789049039, now seen corresponding path program 11 times [2024-05-12 10:35:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636543760] [2024-05-12 10:35:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:57,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:57,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636543760] [2024-05-12 10:35:57,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636543760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:57,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159290877] [2024-05-12 10:35:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:57,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 4124 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:57,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:58,383 INFO L124 PetriNetUnfolderBase]: 3246/5318 cut-off events. [2024-05-12 10:35:58,383 INFO L125 PetriNetUnfolderBase]: For 158185/158191 co-relation queries the response was YES. [2024-05-12 10:35:58,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31811 conditions, 5318 events. 3246/5318 cut-off events. For 158185/158191 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35155 event pairs, 524 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 31704. Up to 4289 conditions per place. [2024-05-12 10:35:58,444 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 234 selfloop transitions, 123 changer transitions 0/369 dead transitions. [2024-05-12 10:35:58,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 369 transitions, 5210 flow [2024-05-12 10:35:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-05-12 10:35:58,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-05-12 10:35:58,445 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 4124 flow. Second operand 7 states and 211 transitions. [2024-05-12 10:35:58,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 369 transitions, 5210 flow [2024-05-12 10:35:58,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 369 transitions, 4980 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:58,914 INFO L231 Difference]: Finished difference. Result has 238 places, 329 transitions, 4411 flow [2024-05-12 10:35:58,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4411, PETRI_PLACES=238, PETRI_TRANSITIONS=329} [2024-05-12 10:35:58,914 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 188 predicate places. [2024-05-12 10:35:58,914 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 329 transitions, 4411 flow [2024-05-12 10:35:58,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:58,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:58,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:35:58,915 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:58,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:58,915 INFO L85 PathProgramCache]: Analyzing trace with hash -397817155, now seen corresponding path program 4 times [2024-05-12 10:35:58,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:58,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479428108] [2024-05-12 10:35:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:59,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:59,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479428108] [2024-05-12 10:35:59,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479428108] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:59,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:59,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:59,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970693179] [2024-05-12 10:35:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:59,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:59,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:59,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:59,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 329 transitions, 4411 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:59,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:59,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:59,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:00,136 INFO L124 PetriNetUnfolderBase]: 3305/5472 cut-off events. [2024-05-12 10:36:00,137 INFO L125 PetriNetUnfolderBase]: For 173230/173230 co-relation queries the response was YES. [2024-05-12 10:36:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33184 conditions, 5472 events. 3305/5472 cut-off events. For 173230/173230 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36767 event pairs, 896 based on Foata normal form. 10/5427 useless extension candidates. Maximal degree in co-relation 33076. Up to 4684 conditions per place. [2024-05-12 10:36:00,197 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 324 selfloop transitions, 31 changer transitions 0/367 dead transitions. [2024-05-12 10:36:00,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 367 transitions, 5251 flow [2024-05-12 10:36:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:36:00,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 10:36:00,199 INFO L175 Difference]: Start difference. First operand has 238 places, 329 transitions, 4411 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:36:00,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 367 transitions, 5251 flow [2024-05-12 10:36:00,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 367 transitions, 5100 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:00,713 INFO L231 Difference]: Finished difference. Result has 240 places, 330 transitions, 4345 flow [2024-05-12 10:36:00,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4345, PETRI_PLACES=240, PETRI_TRANSITIONS=330} [2024-05-12 10:36:00,714 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-05-12 10:36:00,714 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 330 transitions, 4345 flow [2024-05-12 10:36:00,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:00,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:00,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:00,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:36:00,715 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:00,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 864491957, now seen corresponding path program 2 times [2024-05-12 10:36:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:00,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283785742] [2024-05-12 10:36:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283785742] [2024-05-12 10:36:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283785742] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265849285] [2024-05-12 10:36:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:01,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:01,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 330 transitions, 4345 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:01,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:01,895 INFO L124 PetriNetUnfolderBase]: 3298/5374 cut-off events. [2024-05-12 10:36:01,895 INFO L125 PetriNetUnfolderBase]: For 179085/179085 co-relation queries the response was YES. [2024-05-12 10:36:01,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33276 conditions, 5374 events. 3298/5374 cut-off events. For 179085/179085 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35800 event pairs, 517 based on Foata normal form. 14/5360 useless extension candidates. Maximal degree in co-relation 33167. Up to 4427 conditions per place. [2024-05-12 10:36:01,961 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 267 selfloop transitions, 62 changer transitions 0/367 dead transitions. [2024-05-12 10:36:01,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 367 transitions, 5163 flow [2024-05-12 10:36:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 10:36:01,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-05-12 10:36:01,963 INFO L175 Difference]: Start difference. First operand has 240 places, 330 transitions, 4345 flow. Second operand 6 states and 183 transitions. [2024-05-12 10:36:01,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 367 transitions, 5163 flow [2024-05-12 10:36:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 367 transitions, 5102 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:02,433 INFO L231 Difference]: Finished difference. Result has 242 places, 333 transitions, 4479 flow [2024-05-12 10:36:02,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4479, PETRI_PLACES=242, PETRI_TRANSITIONS=333} [2024-05-12 10:36:02,433 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-05-12 10:36:02,433 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 333 transitions, 4479 flow [2024-05-12 10:36:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:02,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:02,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:36:02,434 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:02,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash 878776757, now seen corresponding path program 3 times [2024-05-12 10:36:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951173176] [2024-05-12 10:36:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951173176] [2024-05-12 10:36:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951173176] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481793313] [2024-05-12 10:36:02,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:02,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:02,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 333 transitions, 4479 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:02,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:02,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:03,721 INFO L124 PetriNetUnfolderBase]: 3635/5912 cut-off events. [2024-05-12 10:36:03,721 INFO L125 PetriNetUnfolderBase]: For 221854/221872 co-relation queries the response was YES. [2024-05-12 10:36:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37802 conditions, 5912 events. 3635/5912 cut-off events. For 221854/221872 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39946 event pairs, 462 based on Foata normal form. 32/5900 useless extension candidates. Maximal degree in co-relation 37692. Up to 4385 conditions per place. [2024-05-12 10:36:03,792 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 276 selfloop transitions, 64 changer transitions 0/378 dead transitions. [2024-05-12 10:36:03,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 378 transitions, 5509 flow [2024-05-12 10:36:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-05-12 10:36:03,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-05-12 10:36:03,793 INFO L175 Difference]: Start difference. First operand has 242 places, 333 transitions, 4479 flow. Second operand 6 states and 188 transitions. [2024-05-12 10:36:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 378 transitions, 5509 flow [2024-05-12 10:36:04,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 378 transitions, 5378 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:04,397 INFO L231 Difference]: Finished difference. Result has 245 places, 339 transitions, 4620 flow [2024-05-12 10:36:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4620, PETRI_PLACES=245, PETRI_TRANSITIONS=339} [2024-05-12 10:36:04,398 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 195 predicate places. [2024-05-12 10:36:04,398 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 339 transitions, 4620 flow [2024-05-12 10:36:04,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:04,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:36:04,398 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:04,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 464994647, now seen corresponding path program 4 times [2024-05-12 10:36:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457304779] [2024-05-12 10:36:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:04,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457304779] [2024-05-12 10:36:04,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457304779] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:04,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:04,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768896388] [2024-05-12 10:36:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:04,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:04,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 339 transitions, 4620 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:04,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:04,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:05,779 INFO L124 PetriNetUnfolderBase]: 3689/6007 cut-off events. [2024-05-12 10:36:05,780 INFO L125 PetriNetUnfolderBase]: For 225235/225253 co-relation queries the response was YES. [2024-05-12 10:36:05,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38878 conditions, 6007 events. 3689/6007 cut-off events. For 225235/225253 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 40834 event pairs, 614 based on Foata normal form. 30/5995 useless extension candidates. Maximal degree in co-relation 38766. Up to 4995 conditions per place. [2024-05-12 10:36:05,841 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 266 selfloop transitions, 73 changer transitions 0/377 dead transitions. [2024-05-12 10:36:05,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 377 transitions, 5674 flow [2024-05-12 10:36:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:36:05,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:36:05,843 INFO L175 Difference]: Start difference. First operand has 245 places, 339 transitions, 4620 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:36:05,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 377 transitions, 5674 flow [2024-05-12 10:36:06,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 377 transitions, 5591 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:06,439 INFO L231 Difference]: Finished difference. Result has 250 places, 341 transitions, 4744 flow [2024-05-12 10:36:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4744, PETRI_PLACES=250, PETRI_TRANSITIONS=341} [2024-05-12 10:36:06,440 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-05-12 10:36:06,440 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 341 transitions, 4744 flow [2024-05-12 10:36:06,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:06,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:36:06,441 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:06,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash 68106525, now seen corresponding path program 1 times [2024-05-12 10:36:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862706124] [2024-05-12 10:36:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:06,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:06,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862706124] [2024-05-12 10:36:06,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862706124] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:06,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:06,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035710538] [2024-05-12 10:36:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:06,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:06,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 341 transitions, 4744 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:06,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:06,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:07,813 INFO L124 PetriNetUnfolderBase]: 3877/6259 cut-off events. [2024-05-12 10:36:07,814 INFO L125 PetriNetUnfolderBase]: For 224622/224639 co-relation queries the response was YES. [2024-05-12 10:36:07,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40780 conditions, 6259 events. 3877/6259 cut-off events. For 224622/224639 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42156 event pairs, 586 based on Foata normal form. 16/6242 useless extension candidates. Maximal degree in co-relation 40666. Up to 5299 conditions per place. [2024-05-12 10:36:07,892 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 294 selfloop transitions, 70 changer transitions 0/376 dead transitions. [2024-05-12 10:36:07,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 5773 flow [2024-05-12 10:36:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:36:07,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 10:36:07,893 INFO L175 Difference]: Start difference. First operand has 250 places, 341 transitions, 4744 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:36:07,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 5773 flow [2024-05-12 10:36:08,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 376 transitions, 5604 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:08,544 INFO L231 Difference]: Finished difference. Result has 252 places, 349 transitions, 4877 flow [2024-05-12 10:36:08,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4877, PETRI_PLACES=252, PETRI_TRANSITIONS=349} [2024-05-12 10:36:08,545 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 202 predicate places. [2024-05-12 10:36:08,545 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 349 transitions, 4877 flow [2024-05-12 10:36:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:08,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:08,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:08,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:36:08,546 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:08,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash 488299677, now seen corresponding path program 2 times [2024-05-12 10:36:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:08,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195034858] [2024-05-12 10:36:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:08,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:08,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195034858] [2024-05-12 10:36:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195034858] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:08,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:08,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577698488] [2024-05-12 10:36:08,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:08,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:08,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 349 transitions, 4877 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:08,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:08,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:08,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:09,906 INFO L124 PetriNetUnfolderBase]: 3890/6295 cut-off events. [2024-05-12 10:36:09,907 INFO L125 PetriNetUnfolderBase]: For 228317/228334 co-relation queries the response was YES. [2024-05-12 10:36:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41022 conditions, 6295 events. 3890/6295 cut-off events. For 228317/228334 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42658 event pairs, 677 based on Foata normal form. 16/6278 useless extension candidates. Maximal degree in co-relation 40906. Up to 5469 conditions per place. [2024-05-12 10:36:09,982 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 298 selfloop transitions, 63 changer transitions 0/373 dead transitions. [2024-05-12 10:36:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 373 transitions, 5691 flow [2024-05-12 10:36:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 10:36:09,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:36:09,983 INFO L175 Difference]: Start difference. First operand has 252 places, 349 transitions, 4877 flow. Second operand 6 states and 164 transitions. [2024-05-12 10:36:09,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 373 transitions, 5691 flow [2024-05-12 10:36:10,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 5535 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:10,718 INFO L231 Difference]: Finished difference. Result has 256 places, 351 transitions, 4899 flow [2024-05-12 10:36:10,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4899, PETRI_PLACES=256, PETRI_TRANSITIONS=351} [2024-05-12 10:36:10,718 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 206 predicate places. [2024-05-12 10:36:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 351 transitions, 4899 flow [2024-05-12 10:36:10,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:10,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:10,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:10,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:36:10,719 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:10,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1673622627, now seen corresponding path program 3 times [2024-05-12 10:36:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479256551] [2024-05-12 10:36:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:11,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479256551] [2024-05-12 10:36:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479256551] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:11,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:11,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626472845] [2024-05-12 10:36:11,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:11,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:11,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:11,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 351 transitions, 4899 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:11,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:11,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:11,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:12,184 INFO L124 PetriNetUnfolderBase]: 3956/6341 cut-off events. [2024-05-12 10:36:12,184 INFO L125 PetriNetUnfolderBase]: For 242212/242218 co-relation queries the response was YES. [2024-05-12 10:36:12,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41043 conditions, 6341 events. 3956/6341 cut-off events. For 242212/242218 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 42600 event pairs, 525 based on Foata normal form. 24/6357 useless extension candidates. Maximal degree in co-relation 40925. Up to 5370 conditions per place. [2024-05-12 10:36:12,254 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 310 selfloop transitions, 65 changer transitions 0/387 dead transitions. [2024-05-12 10:36:12,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 387 transitions, 5794 flow [2024-05-12 10:36:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 10:36:12,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:36:12,256 INFO L175 Difference]: Start difference. First operand has 256 places, 351 transitions, 4899 flow. Second operand 6 states and 180 transitions. [2024-05-12 10:36:12,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 387 transitions, 5794 flow [2024-05-12 10:36:12,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 387 transitions, 5646 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:12,954 INFO L231 Difference]: Finished difference. Result has 258 places, 353 transitions, 4940 flow [2024-05-12 10:36:12,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4940, PETRI_PLACES=258, PETRI_TRANSITIONS=353} [2024-05-12 10:36:12,954 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-05-12 10:36:12,954 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 353 transitions, 4940 flow [2024-05-12 10:36:12,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:12,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:12,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:36:12,955 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:12,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:12,955 INFO L85 PathProgramCache]: Analyzing trace with hash 228208726, now seen corresponding path program 1 times [2024-05-12 10:36:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:12,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155719318] [2024-05-12 10:36:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:13,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:13,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155719318] [2024-05-12 10:36:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155719318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:13,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:13,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:13,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029175505] [2024-05-12 10:36:13,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:36:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:36:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:36:13,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 10:36:13,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 353 transitions, 4940 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 10:36:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,788 INFO L124 PetriNetUnfolderBase]: 2438/5326 cut-off events. [2024-05-12 10:36:13,789 INFO L125 PetriNetUnfolderBase]: For 99088/100764 co-relation queries the response was YES. [2024-05-12 10:36:13,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24727 conditions, 5326 events. 2438/5326 cut-off events. For 99088/100764 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 46101 event pairs, 281 based on Foata normal form. 278/5193 useless extension candidates. Maximal degree in co-relation 24608. Up to 2090 conditions per place. [2024-05-12 10:36:13,852 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 114 changer transitions 0/370 dead transitions. [2024-05-12 10:36:13,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 370 transitions, 5362 flow [2024-05-12 10:36:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 10:36:13,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 10:36:13,853 INFO L175 Difference]: Start difference. First operand has 258 places, 353 transitions, 4940 flow. Second operand 4 states and 135 transitions. [2024-05-12 10:36:13,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 370 transitions, 5362 flow [2024-05-12 10:36:14,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 370 transitions, 5226 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:14,248 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 5324 flow [2024-05-12 10:36:14,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5324, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2024-05-12 10:36:14,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-05-12 10:36:14,249 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 5324 flow [2024-05-12 10:36:14,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:14,249 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] [2024-05-12 10:36:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:36:14,250 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:14,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1000376053, now seen corresponding path program 1 times [2024-05-12 10:36:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:14,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297041] [2024-05-12 10:36:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297041] [2024-05-12 10:36:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297041] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:14,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:14,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072343545] [2024-05-12 10:36:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:14,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:14,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 5324 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:14,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:14,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:15,791 INFO L124 PetriNetUnfolderBase]: 3844/6455 cut-off events. [2024-05-12 10:36:15,791 INFO L125 PetriNetUnfolderBase]: For 230666/230741 co-relation queries the response was YES. [2024-05-12 10:36:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42143 conditions, 6455 events. 3844/6455 cut-off events. For 230666/230741 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44693 event pairs, 1199 based on Foata normal form. 39/6206 useless extension candidates. Maximal degree in co-relation 42022. Up to 5473 conditions per place. [2024-05-12 10:36:15,874 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 238 selfloop transitions, 146 changer transitions 0/397 dead transitions. [2024-05-12 10:36:15,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 397 transitions, 6586 flow [2024-05-12 10:36:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 10:36:15,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5845410628019324 [2024-05-12 10:36:15,875 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 5324 flow. Second operand 9 states and 242 transitions. [2024-05-12 10:36:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 397 transitions, 6586 flow [2024-05-12 10:36:16,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 397 transitions, 6572 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-05-12 10:36:16,762 INFO L231 Difference]: Finished difference. Result has 267 places, 360 transitions, 5662 flow [2024-05-12 10:36:16,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=267, PETRI_TRANSITIONS=360} [2024-05-12 10:36:16,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-05-12 10:36:16,763 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 360 transitions, 5662 flow [2024-05-12 10:36:16,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:16,763 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] [2024-05-12 10:36:16,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:36:16,763 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:16,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1380455171, now seen corresponding path program 2 times [2024-05-12 10:36:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:16,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576221375] [2024-05-12 10:36:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:16,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576221375] [2024-05-12 10:36:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576221375] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:17,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:17,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505655102] [2024-05-12 10:36:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:17,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:17,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 360 transitions, 5662 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:18,192 INFO L124 PetriNetUnfolderBase]: 3851/6468 cut-off events. [2024-05-12 10:36:18,192 INFO L125 PetriNetUnfolderBase]: For 231267/231362 co-relation queries the response was YES. [2024-05-12 10:36:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41521 conditions, 6468 events. 3851/6468 cut-off events. For 231267/231362 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44816 event pairs, 1225 based on Foata normal form. 37/6221 useless extension candidates. Maximal degree in co-relation 41398. Up to 5481 conditions per place. [2024-05-12 10:36:18,454 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 236 selfloop transitions, 143 changer transitions 0/392 dead transitions. [2024-05-12 10:36:18,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 392 transitions, 6788 flow [2024-05-12 10:36:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:36:18,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:36:18,456 INFO L175 Difference]: Start difference. First operand has 267 places, 360 transitions, 5662 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:36:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 392 transitions, 6788 flow [2024-05-12 10:36:19,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 392 transitions, 6315 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:19,301 INFO L231 Difference]: Finished difference. Result has 267 places, 363 transitions, 5541 flow [2024-05-12 10:36:19,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5541, PETRI_PLACES=267, PETRI_TRANSITIONS=363} [2024-05-12 10:36:19,302 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-05-12 10:36:19,302 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 363 transitions, 5541 flow [2024-05-12 10:36:19,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:19,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:19,302 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] [2024-05-12 10:36:19,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:36:19,302 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:19,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1380455357, now seen corresponding path program 1 times [2024-05-12 10:36:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:19,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748099767] [2024-05-12 10:36:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:19,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748099767] [2024-05-12 10:36:19,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748099767] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:19,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:19,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:19,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891694732] [2024-05-12 10:36:19,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:19,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:19,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:19,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 363 transitions, 5541 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:19,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:19,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:19,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:20,701 INFO L124 PetriNetUnfolderBase]: 3879/6509 cut-off events. [2024-05-12 10:36:20,701 INFO L125 PetriNetUnfolderBase]: For 239640/239721 co-relation queries the response was YES. [2024-05-12 10:36:20,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41873 conditions, 6509 events. 3879/6509 cut-off events. For 239640/239721 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45186 event pairs, 1237 based on Foata normal form. 21/6242 useless extension candidates. Maximal degree in co-relation 41751. Up to 5277 conditions per place. [2024-05-12 10:36:20,783 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 192 selfloop transitions, 199 changer transitions 0/404 dead transitions. [2024-05-12 10:36:20,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 404 transitions, 7127 flow [2024-05-12 10:36:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:36:20,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:36:20,784 INFO L175 Difference]: Start difference. First operand has 267 places, 363 transitions, 5541 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:36:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 404 transitions, 7127 flow [2024-05-12 10:36:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 404 transitions, 6903 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:21,769 INFO L231 Difference]: Finished difference. Result has 270 places, 373 transitions, 5971 flow [2024-05-12 10:36:21,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5317, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5971, PETRI_PLACES=270, PETRI_TRANSITIONS=373} [2024-05-12 10:36:21,769 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-05-12 10:36:21,770 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 373 transitions, 5971 flow [2024-05-12 10:36:21,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:21,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:21,770 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] [2024-05-12 10:36:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:36:21,770 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:21,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1557824027, now seen corresponding path program 2 times [2024-05-12 10:36:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210206346] [2024-05-12 10:36:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:22,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:22,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210206346] [2024-05-12 10:36:22,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210206346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:22,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981499169] [2024-05-12 10:36:22,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:22,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:22,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 373 transitions, 5971 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:22,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:22,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:22,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:23,181 INFO L124 PetriNetUnfolderBase]: 3917/6568 cut-off events. [2024-05-12 10:36:23,181 INFO L125 PetriNetUnfolderBase]: For 257388/257469 co-relation queries the response was YES. [2024-05-12 10:36:23,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43098 conditions, 6568 events. 3917/6568 cut-off events. For 257388/257469 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45605 event pairs, 1237 based on Foata normal form. 21/6294 useless extension candidates. Maximal degree in co-relation 42974. Up to 5311 conditions per place. [2024-05-12 10:36:23,262 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 191 selfloop transitions, 207 changer transitions 0/411 dead transitions. [2024-05-12 10:36:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 411 transitions, 7591 flow [2024-05-12 10:36:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 10:36:23,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 10:36:23,263 INFO L175 Difference]: Start difference. First operand has 270 places, 373 transitions, 5971 flow. Second operand 8 states and 219 transitions. [2024-05-12 10:36:23,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 411 transitions, 7591 flow [2024-05-12 10:36:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 411 transitions, 7257 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:24,273 INFO L231 Difference]: Finished difference. Result has 275 places, 383 transitions, 6325 flow [2024-05-12 10:36:24,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6325, PETRI_PLACES=275, PETRI_TRANSITIONS=383} [2024-05-12 10:36:24,274 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 225 predicate places. [2024-05-12 10:36:24,274 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 383 transitions, 6325 flow [2024-05-12 10:36:24,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:24,274 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] [2024-05-12 10:36:24,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:36:24,274 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:24,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 396314541, now seen corresponding path program 3 times [2024-05-12 10:36:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:24,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641687688] [2024-05-12 10:36:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641687688] [2024-05-12 10:36:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641687688] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:24,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:24,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956097809] [2024-05-12 10:36:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:24,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:24,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:24,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 383 transitions, 6325 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:24,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:24,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:25,793 INFO L124 PetriNetUnfolderBase]: 3934/6595 cut-off events. [2024-05-12 10:36:25,793 INFO L125 PetriNetUnfolderBase]: For 264121/264202 co-relation queries the response was YES. [2024-05-12 10:36:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43963 conditions, 6595 events. 3934/6595 cut-off events. For 264121/264202 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45856 event pairs, 1224 based on Foata normal form. 39/6333 useless extension candidates. Maximal degree in co-relation 43837. Up to 5585 conditions per place. [2024-05-12 10:36:25,874 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 255 selfloop transitions, 149 changer transitions 0/417 dead transitions. [2024-05-12 10:36:25,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 417 transitions, 7659 flow [2024-05-12 10:36:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 10:36:25,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628019323671497 [2024-05-12 10:36:25,875 INFO L175 Difference]: Start difference. First operand has 275 places, 383 transitions, 6325 flow. Second operand 9 states and 233 transitions. [2024-05-12 10:36:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 417 transitions, 7659 flow [2024-05-12 10:36:26,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 417 transitions, 7358 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:26,803 INFO L231 Difference]: Finished difference. Result has 281 places, 389 transitions, 6414 flow [2024-05-12 10:36:26,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6414, PETRI_PLACES=281, PETRI_TRANSITIONS=389} [2024-05-12 10:36:26,803 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 231 predicate places. [2024-05-12 10:36:26,803 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 389 transitions, 6414 flow [2024-05-12 10:36:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:26,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:26,804 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] [2024-05-12 10:36:26,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:36:26,804 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:26,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1557586877, now seen corresponding path program 3 times [2024-05-12 10:36:26,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:26,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989601422] [2024-05-12 10:36:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989601422] [2024-05-12 10:36:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989601422] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:27,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:27,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323387935] [2024-05-12 10:36:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:27,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 389 transitions, 6414 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:28,229 INFO L124 PetriNetUnfolderBase]: 3931/6590 cut-off events. [2024-05-12 10:36:28,229 INFO L125 PetriNetUnfolderBase]: For 270257/270338 co-relation queries the response was YES. [2024-05-12 10:36:28,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43733 conditions, 6590 events. 3931/6590 cut-off events. For 270257/270338 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45764 event pairs, 1240 based on Foata normal form. 21/6316 useless extension candidates. Maximal degree in co-relation 43605. Up to 5323 conditions per place. [2024-05-12 10:36:28,310 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 196 selfloop transitions, 208 changer transitions 0/417 dead transitions. [2024-05-12 10:36:28,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 417 transitions, 7794 flow [2024-05-12 10:36:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 10:36:28,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 10:36:28,311 INFO L175 Difference]: Start difference. First operand has 281 places, 389 transitions, 6414 flow. Second operand 8 states and 219 transitions. [2024-05-12 10:36:28,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 417 transitions, 7794 flow [2024-05-12 10:36:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 417 transitions, 7476 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:29,575 INFO L231 Difference]: Finished difference. Result has 283 places, 389 transitions, 6518 flow [2024-05-12 10:36:29,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6518, PETRI_PLACES=283, PETRI_TRANSITIONS=389} [2024-05-12 10:36:29,575 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-05-12 10:36:29,575 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 389 transitions, 6518 flow [2024-05-12 10:36:29,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:29,576 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] [2024-05-12 10:36:29,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:36:29,576 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:29,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1291797341, now seen corresponding path program 1 times [2024-05-12 10:36:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919537430] [2024-05-12 10:36:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:29,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:29,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919537430] [2024-05-12 10:36:29,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919537430] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:29,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:29,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348699169] [2024-05-12 10:36:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:29,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:29,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:29,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:29,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 389 transitions, 6518 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:29,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:29,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:31,122 INFO L124 PetriNetUnfolderBase]: 4050/6840 cut-off events. [2024-05-12 10:36:31,122 INFO L125 PetriNetUnfolderBase]: For 299461/299492 co-relation queries the response was YES. [2024-05-12 10:36:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45371 conditions, 6840 events. 4050/6840 cut-off events. For 299461/299492 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 47870 event pairs, 1060 based on Foata normal form. 6/6518 useless extension candidates. Maximal degree in co-relation 45242. Up to 5644 conditions per place. [2024-05-12 10:36:31,215 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 361 selfloop transitions, 59 changer transitions 0/433 dead transitions. [2024-05-12 10:36:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 433 transitions, 7660 flow [2024-05-12 10:36:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 10:36:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-05-12 10:36:31,216 INFO L175 Difference]: Start difference. First operand has 283 places, 389 transitions, 6518 flow. Second operand 8 states and 218 transitions. [2024-05-12 10:36:31,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 433 transitions, 7660 flow [2024-05-12 10:36:32,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 433 transitions, 7318 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:32,602 INFO L231 Difference]: Finished difference. Result has 287 places, 391 transitions, 6324 flow [2024-05-12 10:36:32,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6176, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6324, PETRI_PLACES=287, PETRI_TRANSITIONS=391} [2024-05-12 10:36:32,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 237 predicate places. [2024-05-12 10:36:32,606 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 391 transitions, 6324 flow [2024-05-12 10:36:32,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:32,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:32,606 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] [2024-05-12 10:36:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:36:32,607 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:32,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 734742703, now seen corresponding path program 2 times [2024-05-12 10:36:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:32,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992447071] [2024-05-12 10:36:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:33,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992447071] [2024-05-12 10:36:33,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992447071] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:33,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:33,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785110434] [2024-05-12 10:36:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:33,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:33,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 391 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:33,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:33,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:33,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:34,295 INFO L124 PetriNetUnfolderBase]: 4124/6899 cut-off events. [2024-05-12 10:36:34,295 INFO L125 PetriNetUnfolderBase]: For 311068/311099 co-relation queries the response was YES. [2024-05-12 10:36:34,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45766 conditions, 6899 events. 4124/6899 cut-off events. For 311068/311099 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48172 event pairs, 1257 based on Foata normal form. 8/6575 useless extension candidates. Maximal degree in co-relation 45636. Up to 6074 conditions per place. [2024-05-12 10:36:34,383 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 357 selfloop transitions, 52 changer transitions 0/422 dead transitions. [2024-05-12 10:36:34,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 422 transitions, 7260 flow [2024-05-12 10:36:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:36:34,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:36:34,385 INFO L175 Difference]: Start difference. First operand has 287 places, 391 transitions, 6324 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:36:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 422 transitions, 7260 flow [2024-05-12 10:36:35,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 7191 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:35,685 INFO L231 Difference]: Finished difference. Result has 291 places, 392 transitions, 6380 flow [2024-05-12 10:36:35,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6380, PETRI_PLACES=291, PETRI_TRANSITIONS=392} [2024-05-12 10:36:35,686 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-05-12 10:36:35,686 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 392 transitions, 6380 flow [2024-05-12 10:36:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:35,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:35,687 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] [2024-05-12 10:36:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:36:35,687 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:35,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 734416273, now seen corresponding path program 3 times [2024-05-12 10:36:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088928684] [2024-05-12 10:36:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:36,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088928684] [2024-05-12 10:36:36,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088928684] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:36,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:36,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:36,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854773932] [2024-05-12 10:36:36,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:36,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:36,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:36,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:36,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 392 transitions, 6380 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:36,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:36,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:36,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:37,374 INFO L124 PetriNetUnfolderBase]: 4177/6989 cut-off events. [2024-05-12 10:36:37,374 INFO L125 PetriNetUnfolderBase]: For 315337/315371 co-relation queries the response was YES. [2024-05-12 10:36:37,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46448 conditions, 6989 events. 4177/6989 cut-off events. For 315337/315371 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49013 event pairs, 1250 based on Foata normal form. 6/6662 useless extension candidates. Maximal degree in co-relation 46316. Up to 6080 conditions per place. [2024-05-12 10:36:37,454 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 361 selfloop transitions, 54 changer transitions 0/428 dead transitions. [2024-05-12 10:36:37,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 428 transitions, 7356 flow [2024-05-12 10:36:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:36:37,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:36:37,456 INFO L175 Difference]: Start difference. First operand has 291 places, 392 transitions, 6380 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:36:37,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 428 transitions, 7356 flow [2024-05-12 10:36:38,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 428 transitions, 7249 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:38,826 INFO L231 Difference]: Finished difference. Result has 293 places, 393 transitions, 6403 flow [2024-05-12 10:36:38,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6273, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6403, PETRI_PLACES=293, PETRI_TRANSITIONS=393} [2024-05-12 10:36:38,826 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-05-12 10:36:38,827 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 393 transitions, 6403 flow [2024-05-12 10:36:38,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:38,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:38,827 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] [2024-05-12 10:36:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:36:38,827 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:38,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 664756555, now seen corresponding path program 4 times [2024-05-12 10:36:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874782141] [2024-05-12 10:36:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874782141] [2024-05-12 10:36:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874782141] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:39,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:39,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51557889] [2024-05-12 10:36:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:39,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:39,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 393 transitions, 6403 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:39,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:39,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:39,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:40,345 INFO L124 PetriNetUnfolderBase]: 4214/7069 cut-off events. [2024-05-12 10:36:40,345 INFO L125 PetriNetUnfolderBase]: For 323671/324050 co-relation queries the response was YES. [2024-05-12 10:36:40,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47197 conditions, 7069 events. 4214/7069 cut-off events. For 323671/324050 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49815 event pairs, 1310 based on Foata normal form. 204/6949 useless extension candidates. Maximal degree in co-relation 47064. Up to 6051 conditions per place. [2024-05-12 10:36:40,435 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 287 selfloop transitions, 135 changer transitions 0/435 dead transitions. [2024-05-12 10:36:40,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 435 transitions, 7908 flow [2024-05-12 10:36:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:36:40,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:36:40,436 INFO L175 Difference]: Start difference. First operand has 293 places, 393 transitions, 6403 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:36:40,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 435 transitions, 7908 flow [2024-05-12 10:36:42,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 435 transitions, 7792 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:42,028 INFO L231 Difference]: Finished difference. Result has 295 places, 405 transitions, 6749 flow [2024-05-12 10:36:42,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6749, PETRI_PLACES=295, PETRI_TRANSITIONS=405} [2024-05-12 10:36:42,028 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 245 predicate places. [2024-05-12 10:36:42,028 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 405 transitions, 6749 flow [2024-05-12 10:36:42,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:42,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:42,029 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] [2024-05-12 10:36:42,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:36:42,029 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:42,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 286366415, now seen corresponding path program 5 times [2024-05-12 10:36:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:42,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554449651] [2024-05-12 10:36:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554449651] [2024-05-12 10:36:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554449651] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:36:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083596272] [2024-05-12 10:36:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:42,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:36:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:36:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:36:42,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:42,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 405 transitions, 6749 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:42,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:42,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:42,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:43,710 INFO L124 PetriNetUnfolderBase]: 4231/7072 cut-off events. [2024-05-12 10:36:43,710 INFO L125 PetriNetUnfolderBase]: For 331024/331098 co-relation queries the response was YES. [2024-05-12 10:36:43,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47642 conditions, 7072 events. 4231/7072 cut-off events. For 331024/331098 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49616 event pairs, 1281 based on Foata normal form. 36/6760 useless extension candidates. Maximal degree in co-relation 47508. Up to 6070 conditions per place. [2024-05-12 10:36:43,807 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 283 selfloop transitions, 150 changer transitions 0/446 dead transitions. [2024-05-12 10:36:43,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 446 transitions, 8203 flow [2024-05-12 10:36:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-05-12 10:36:43,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541501976284585 [2024-05-12 10:36:43,809 INFO L175 Difference]: Start difference. First operand has 295 places, 405 transitions, 6749 flow. Second operand 11 states and 274 transitions. [2024-05-12 10:36:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 446 transitions, 8203 flow [2024-05-12 10:36:45,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 446 transitions, 7911 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:45,146 INFO L231 Difference]: Finished difference. Result has 301 places, 411 transitions, 6857 flow [2024-05-12 10:36:45,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6857, PETRI_PLACES=301, PETRI_TRANSITIONS=411} [2024-05-12 10:36:45,147 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-05-12 10:36:45,147 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 411 transitions, 6857 flow [2024-05-12 10:36:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:45,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:45,147 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] [2024-05-12 10:36:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:36:45,148 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:45,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -163684173, now seen corresponding path program 6 times [2024-05-12 10:36:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268642926] [2024-05-12 10:36:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:45,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268642926] [2024-05-12 10:36:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268642926] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:45,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:45,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567219189] [2024-05-12 10:36:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:45,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:45,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 411 transitions, 6857 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:45,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:45,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:46,741 INFO L124 PetriNetUnfolderBase]: 4228/7091 cut-off events. [2024-05-12 10:36:46,741 INFO L125 PetriNetUnfolderBase]: For 340319/340705 co-relation queries the response was YES. [2024-05-12 10:36:46,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47712 conditions, 7091 events. 4228/7091 cut-off events. For 340319/340705 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49960 event pairs, 1330 based on Foata normal form. 141/6900 useless extension candidates. Maximal degree in co-relation 47576. Up to 6067 conditions per place. [2024-05-12 10:36:46,820 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 290 selfloop transitions, 129 changer transitions 0/432 dead transitions. [2024-05-12 10:36:46,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 432 transitions, 8023 flow [2024-05-12 10:36:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 10:36:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:36:46,822 INFO L175 Difference]: Start difference. First operand has 301 places, 411 transitions, 6857 flow. Second operand 6 states and 164 transitions. [2024-05-12 10:36:46,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 432 transitions, 8023 flow [2024-05-12 10:36:48,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 432 transitions, 7795 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:48,479 INFO L231 Difference]: Finished difference. Result has 302 places, 411 transitions, 6894 flow [2024-05-12 10:36:48,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6894, PETRI_PLACES=302, PETRI_TRANSITIONS=411} [2024-05-12 10:36:48,480 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 252 predicate places. [2024-05-12 10:36:48,480 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 411 transitions, 6894 flow [2024-05-12 10:36:48,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:48,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:48,481 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] [2024-05-12 10:36:48,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:36:48,481 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:48,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash 280825475, now seen corresponding path program 7 times [2024-05-12 10:36:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:48,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107073394] [2024-05-12 10:36:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:48,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:48,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107073394] [2024-05-12 10:36:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107073394] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:48,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:48,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29940182] [2024-05-12 10:36:48,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:48,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 411 transitions, 6894 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:48,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:50,157 INFO L124 PetriNetUnfolderBase]: 4235/7087 cut-off events. [2024-05-12 10:36:50,158 INFO L125 PetriNetUnfolderBase]: For 346827/346928 co-relation queries the response was YES. [2024-05-12 10:36:50,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47855 conditions, 7087 events. 4235/7087 cut-off events. For 346827/346928 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49732 event pairs, 1301 based on Foata normal form. 50/6800 useless extension candidates. Maximal degree in co-relation 47718. Up to 6224 conditions per place. [2024-05-12 10:36:50,247 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 344 selfloop transitions, 81 changer transitions 0/438 dead transitions. [2024-05-12 10:36:50,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 438 transitions, 7844 flow [2024-05-12 10:36:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:36:50,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:36:50,248 INFO L175 Difference]: Start difference. First operand has 302 places, 411 transitions, 6894 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:36:50,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 438 transitions, 7844 flow [2024-05-12 10:36:51,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 438 transitions, 7574 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:51,834 INFO L231 Difference]: Finished difference. Result has 305 places, 414 transitions, 6838 flow [2024-05-12 10:36:51,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6838, PETRI_PLACES=305, PETRI_TRANSITIONS=414} [2024-05-12 10:36:51,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 255 predicate places. [2024-05-12 10:36:51,835 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 414 transitions, 6838 flow [2024-05-12 10:36:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:51,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:51,835 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] [2024-05-12 10:36:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:36:51,836 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:51,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:51,836 INFO L85 PathProgramCache]: Analyzing trace with hash 659514331, now seen corresponding path program 4 times [2024-05-12 10:36:51,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:51,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645857971] [2024-05-12 10:36:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:51,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:52,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645857971] [2024-05-12 10:36:52,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645857971] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:52,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:52,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:52,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809542208] [2024-05-12 10:36:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:52,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:52,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:52,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 414 transitions, 6838 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:52,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:52,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:52,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:53,382 INFO L124 PetriNetUnfolderBase]: 4264/7133 cut-off events. [2024-05-12 10:36:53,382 INFO L125 PetriNetUnfolderBase]: For 357242/357358 co-relation queries the response was YES. [2024-05-12 10:36:53,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48212 conditions, 7133 events. 4264/7133 cut-off events. For 357242/357358 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50048 event pairs, 1312 based on Foata normal form. 43/6834 useless extension candidates. Maximal degree in co-relation 48074. Up to 6146 conditions per place. [2024-05-12 10:36:53,480 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 312 selfloop transitions, 128 changer transitions 0/453 dead transitions. [2024-05-12 10:36:53,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 453 transitions, 8421 flow [2024-05-12 10:36:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:36:53,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 10:36:53,482 INFO L175 Difference]: Start difference. First operand has 305 places, 414 transitions, 6838 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:36:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 453 transitions, 8421 flow [2024-05-12 10:36:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 453 transitions, 8259 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:55,119 INFO L231 Difference]: Finished difference. Result has 308 places, 426 transitions, 7183 flow [2024-05-12 10:36:55,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6676, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7183, PETRI_PLACES=308, PETRI_TRANSITIONS=426} [2024-05-12 10:36:55,119 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-05-12 10:36:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 426 transitions, 7183 flow [2024-05-12 10:36:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:55,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:55,120 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] [2024-05-12 10:36:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:36:55,120 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:55,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1387099129, now seen corresponding path program 8 times [2024-05-12 10:36:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:55,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200191350] [2024-05-12 10:36:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200191350] [2024-05-12 10:36:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200191350] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:55,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600639390] [2024-05-12 10:36:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:55,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 426 transitions, 7183 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:55,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:55,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:55,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:56,859 INFO L124 PetriNetUnfolderBase]: 4281/7158 cut-off events. [2024-05-12 10:36:56,859 INFO L125 PetriNetUnfolderBase]: For 369537/369638 co-relation queries the response was YES. [2024-05-12 10:36:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48812 conditions, 7158 events. 4281/7158 cut-off events. For 369537/369638 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50354 event pairs, 1300 based on Foata normal form. 50/6860 useless extension candidates. Maximal degree in co-relation 48672. Up to 6277 conditions per place. [2024-05-12 10:36:56,947 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-05-12 10:36:56,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 460 transitions, 8377 flow [2024-05-12 10:36:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-05-12 10:36:56,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276679841897233 [2024-05-12 10:36:56,949 INFO L175 Difference]: Start difference. First operand has 308 places, 426 transitions, 7183 flow. Second operand 11 states and 267 transitions. [2024-05-12 10:36:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 460 transitions, 8377 flow [2024-05-12 10:36:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 8172 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:58,153 INFO L231 Difference]: Finished difference. Result has 317 places, 432 transitions, 7268 flow [2024-05-12 10:36:58,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6978, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7268, PETRI_PLACES=317, PETRI_TRANSITIONS=432} [2024-05-12 10:36:58,154 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-05-12 10:36:58,154 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 432 transitions, 7268 flow [2024-05-12 10:36:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:58,154 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] [2024-05-12 10:36:58,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:36:58,155 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:58,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:58,155 INFO L85 PathProgramCache]: Analyzing trace with hash -154309587, now seen corresponding path program 5 times [2024-05-12 10:36:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866731735] [2024-05-12 10:36:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:58,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866731735] [2024-05-12 10:36:58,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866731735] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:58,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:58,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:58,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478230799] [2024-05-12 10:36:58,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:58,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:58,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:58,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:58,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 432 transitions, 7268 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:58,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:58,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:59,749 INFO L124 PetriNetUnfolderBase]: 4304/7194 cut-off events. [2024-05-12 10:36:59,749 INFO L125 PetriNetUnfolderBase]: For 381355/381465 co-relation queries the response was YES. [2024-05-12 10:36:59,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49209 conditions, 7194 events. 4304/7194 cut-off events. For 381355/381465 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50529 event pairs, 1312 based on Foata normal form. 49/6895 useless extension candidates. Maximal degree in co-relation 49067. Up to 6190 conditions per place. [2024-05-12 10:36:59,841 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 320 selfloop transitions, 138 changer transitions 0/471 dead transitions. [2024-05-12 10:36:59,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 471 transitions, 9026 flow [2024-05-12 10:36:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-05-12 10:36:59,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558695652173913 [2024-05-12 10:36:59,843 INFO L175 Difference]: Start difference. First operand has 317 places, 432 transitions, 7268 flow. Second operand 10 states and 257 transitions. [2024-05-12 10:36:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 471 transitions, 9026 flow [2024-05-12 10:37:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 471 transitions, 8838 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 10:37:01,410 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 7548 flow [2024-05-12 10:37:01,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7548, PETRI_PLACES=319, PETRI_TRANSITIONS=441} [2024-05-12 10:37:01,411 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 269 predicate places. [2024-05-12 10:37:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 7548 flow [2024-05-12 10:37:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:01,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:01,411 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] [2024-05-12 10:37:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:37:01,411 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:01,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1386885787, now seen corresponding path program 1 times [2024-05-12 10:37:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058425662] [2024-05-12 10:37:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:01,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058425662] [2024-05-12 10:37:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058425662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974327855] [2024-05-12 10:37:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:01,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:01,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 441 transitions, 7548 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:01,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:01,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:01,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:02,999 INFO L124 PetriNetUnfolderBase]: 4311/7204 cut-off events. [2024-05-12 10:37:03,000 INFO L125 PetriNetUnfolderBase]: For 390700/390827 co-relation queries the response was YES. [2024-05-12 10:37:03,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49575 conditions, 7204 events. 4311/7204 cut-off events. For 390700/390827 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50587 event pairs, 1312 based on Foata normal form. 52/6905 useless extension candidates. Maximal degree in co-relation 49432. Up to 6242 conditions per place. [2024-05-12 10:37:03,098 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 339 selfloop transitions, 115 changer transitions 0/467 dead transitions. [2024-05-12 10:37:03,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 467 transitions, 8871 flow [2024-05-12 10:37:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:37:03,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:37:03,099 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 7548 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:37:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 467 transitions, 8871 flow [2024-05-12 10:37:04,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 467 transitions, 8537 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:04,753 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 7513 flow [2024-05-12 10:37:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7513, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-05-12 10:37:04,754 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-05-12 10:37:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 7513 flow [2024-05-12 10:37:04,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:04,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:04,754 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] [2024-05-12 10:37:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:37:04,754 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:04,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash 668768575, now seen corresponding path program 9 times [2024-05-12 10:37:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:04,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356884263] [2024-05-12 10:37:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:05,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:05,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356884263] [2024-05-12 10:37:05,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356884263] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:05,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:05,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62844709] [2024-05-12 10:37:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:05,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:05,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 7513 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:05,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:05,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:05,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:06,455 INFO L124 PetriNetUnfolderBase]: 4308/7199 cut-off events. [2024-05-12 10:37:06,456 INFO L125 PetriNetUnfolderBase]: For 394917/395018 co-relation queries the response was YES. [2024-05-12 10:37:06,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49451 conditions, 7199 events. 4308/7199 cut-off events. For 394917/395018 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50549 event pairs, 1300 based on Foata normal form. 50/6894 useless extension candidates. Maximal degree in co-relation 49307. Up to 6313 conditions per place. [2024-05-12 10:37:06,548 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 372 selfloop transitions, 88 changer transitions 0/473 dead transitions. [2024-05-12 10:37:06,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 473 transitions, 8503 flow [2024-05-12 10:37:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:37:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:37:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 306 transitions. [2024-05-12 10:37:06,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117056856187291 [2024-05-12 10:37:06,549 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 7513 flow. Second operand 13 states and 306 transitions. [2024-05-12 10:37:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 473 transitions, 8503 flow [2024-05-12 10:37:08,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 473 transitions, 8300 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:08,074 INFO L231 Difference]: Finished difference. Result has 329 places, 444 transitions, 7492 flow [2024-05-12 10:37:08,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7492, PETRI_PLACES=329, PETRI_TRANSITIONS=444} [2024-05-12 10:37:08,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 279 predicate places. [2024-05-12 10:37:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 444 transitions, 7492 flow [2024-05-12 10:37:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:08,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:08,076 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] [2024-05-12 10:37:08,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:37:08,076 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:08,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 668774527, now seen corresponding path program 2 times [2024-05-12 10:37:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56612135] [2024-05-12 10:37:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:08,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:08,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56612135] [2024-05-12 10:37:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56612135] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:08,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:08,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560111901] [2024-05-12 10:37:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:08,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:08,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 444 transitions, 7492 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:08,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:08,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:08,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:09,700 INFO L124 PetriNetUnfolderBase]: 4315/7211 cut-off events. [2024-05-12 10:37:09,700 INFO L125 PetriNetUnfolderBase]: For 404981/405082 co-relation queries the response was YES. [2024-05-12 10:37:09,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49550 conditions, 7211 events. 4315/7211 cut-off events. For 404981/405082 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50605 event pairs, 1311 based on Foata normal form. 40/6896 useless extension candidates. Maximal degree in co-relation 49404. Up to 6246 conditions per place. [2024-05-12 10:37:09,802 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 339 selfloop transitions, 118 changer transitions 0/470 dead transitions. [2024-05-12 10:37:09,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 470 transitions, 8826 flow [2024-05-12 10:37:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 10:37:09,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 10:37:09,803 INFO L175 Difference]: Start difference. First operand has 329 places, 444 transitions, 7492 flow. Second operand 8 states and 209 transitions. [2024-05-12 10:37:09,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 470 transitions, 8826 flow [2024-05-12 10:37:11,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 470 transitions, 8650 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-05-12 10:37:11,595 INFO L231 Difference]: Finished difference. Result has 326 places, 447 transitions, 7618 flow [2024-05-12 10:37:11,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7618, PETRI_PLACES=326, PETRI_TRANSITIONS=447} [2024-05-12 10:37:11,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 276 predicate places. [2024-05-12 10:37:11,596 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 447 transitions, 7618 flow [2024-05-12 10:37:11,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:11,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:11,596 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] [2024-05-12 10:37:11,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:37:11,596 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:11,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash 668779921, now seen corresponding path program 6 times [2024-05-12 10:37:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613625829] [2024-05-12 10:37:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:11,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613625829] [2024-05-12 10:37:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613625829] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:11,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868412557] [2024-05-12 10:37:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:11,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:11,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:11,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 447 transitions, 7618 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:11,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:11,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:11,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:13,221 INFO L124 PetriNetUnfolderBase]: 4312/7212 cut-off events. [2024-05-12 10:37:13,222 INFO L125 PetriNetUnfolderBase]: For 412021/412161 co-relation queries the response was YES. [2024-05-12 10:37:13,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49682 conditions, 7212 events. 4312/7212 cut-off events. For 412021/412161 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50757 event pairs, 1314 based on Foata normal form. 55/6917 useless extension candidates. Maximal degree in co-relation 49535. Up to 6199 conditions per place. [2024-05-12 10:37:13,321 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 318 selfloop transitions, 146 changer transitions 0/477 dead transitions. [2024-05-12 10:37:13,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 477 transitions, 9080 flow [2024-05-12 10:37:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:37:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:37:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-05-12 10:37:13,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395256916996047 [2024-05-12 10:37:13,322 INFO L175 Difference]: Start difference. First operand has 326 places, 447 transitions, 7618 flow. Second operand 11 states and 273 transitions. [2024-05-12 10:37:13,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 477 transitions, 9080 flow [2024-05-12 10:37:15,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 477 transitions, 8780 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:15,309 INFO L231 Difference]: Finished difference. Result has 331 places, 447 transitions, 7616 flow [2024-05-12 10:37:15,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7616, PETRI_PLACES=331, PETRI_TRANSITIONS=447} [2024-05-12 10:37:15,310 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 281 predicate places. [2024-05-12 10:37:15,310 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 447 transitions, 7616 flow [2024-05-12 10:37:15,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:15,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:15,310 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] [2024-05-12 10:37:15,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:37:15,311 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:15,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1864878399, now seen corresponding path program 10 times [2024-05-12 10:37:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:15,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361374194] [2024-05-12 10:37:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361374194] [2024-05-12 10:37:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361374194] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:15,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:15,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:15,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662685963] [2024-05-12 10:37:15,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:15,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:15,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:15,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:15,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 447 transitions, 7616 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:15,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:15,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:15,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:16,954 INFO L124 PetriNetUnfolderBase]: 4329/7232 cut-off events. [2024-05-12 10:37:16,955 INFO L125 PetriNetUnfolderBase]: For 423161/423257 co-relation queries the response was YES. [2024-05-12 10:37:17,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50051 conditions, 7232 events. 4329/7232 cut-off events. For 423161/423257 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50807 event pairs, 1298 based on Foata normal form. 45/6912 useless extension candidates. Maximal degree in co-relation 49903. Up to 6360 conditions per place. [2024-05-12 10:37:17,063 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 388 selfloop transitions, 73 changer transitions 0/474 dead transitions. [2024-05-12 10:37:17,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 474 transitions, 8844 flow [2024-05-12 10:37:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-05-12 10:37:17,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-05-12 10:37:17,065 INFO L175 Difference]: Start difference. First operand has 331 places, 447 transitions, 7616 flow. Second operand 10 states and 242 transitions. [2024-05-12 10:37:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 474 transitions, 8844 flow [2024-05-12 10:37:18,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 474 transitions, 8544 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-05-12 10:37:18,844 INFO L231 Difference]: Finished difference. Result has 332 places, 453 transitions, 7588 flow [2024-05-12 10:37:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7588, PETRI_PLACES=332, PETRI_TRANSITIONS=453} [2024-05-12 10:37:18,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-05-12 10:37:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 453 transitions, 7588 flow [2024-05-12 10:37:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:18,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:18,845 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] [2024-05-12 10:37:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:37:18,846 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:18,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1861159515, now seen corresponding path program 7 times [2024-05-12 10:37:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:18,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316159176] [2024-05-12 10:37:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:18,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:19,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:19,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316159176] [2024-05-12 10:37:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316159176] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:19,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070926963] [2024-05-12 10:37:19,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:19,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:19,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:19,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:19,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:19,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 453 transitions, 7588 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:19,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:19,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:19,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:20,542 INFO L124 PetriNetUnfolderBase]: 4377/7317 cut-off events. [2024-05-12 10:37:20,543 INFO L125 PetriNetUnfolderBase]: For 448847/449001 co-relation queries the response was YES. [2024-05-12 10:37:20,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51014 conditions, 7317 events. 4377/7317 cut-off events. For 448847/449001 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51642 event pairs, 1356 based on Foata normal form. 32/7008 useless extension candidates. Maximal degree in co-relation 50864. Up to 5868 conditions per place. [2024-05-12 10:37:20,638 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 219 selfloop transitions, 257 changer transitions 0/489 dead transitions. [2024-05-12 10:37:20,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 489 transitions, 9705 flow [2024-05-12 10:37:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:37:20,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:37:20,640 INFO L175 Difference]: Start difference. First operand has 332 places, 453 transitions, 7588 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:37:20,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 489 transitions, 9705 flow [2024-05-12 10:37:22,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 489 transitions, 9541 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:22,748 INFO L231 Difference]: Finished difference. Result has 333 places, 466 transitions, 8265 flow [2024-05-12 10:37:22,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8265, PETRI_PLACES=333, PETRI_TRANSITIONS=466} [2024-05-12 10:37:22,749 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 283 predicate places. [2024-05-12 10:37:22,749 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 466 transitions, 8265 flow [2024-05-12 10:37:22,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:22,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:22,750 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] [2024-05-12 10:37:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:37:22,750 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:22,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1217131727, now seen corresponding path program 11 times [2024-05-12 10:37:22,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199708786] [2024-05-12 10:37:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:23,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199708786] [2024-05-12 10:37:23,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199708786] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:23,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:23,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:23,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652646706] [2024-05-12 10:37:23,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:23,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 466 transitions, 8265 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:24,500 INFO L124 PetriNetUnfolderBase]: 4374/7301 cut-off events. [2024-05-12 10:37:24,500 INFO L125 PetriNetUnfolderBase]: For 458267/458367 co-relation queries the response was YES. [2024-05-12 10:37:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51657 conditions, 7301 events. 4374/7301 cut-off events. For 458267/458367 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51419 event pairs, 1327 based on Foata normal form. 43/6974 useless extension candidates. Maximal degree in co-relation 51506. Up to 6204 conditions per place. [2024-05-12 10:37:24,608 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 296 selfloop transitions, 181 changer transitions 0/490 dead transitions. [2024-05-12 10:37:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 490 transitions, 9915 flow [2024-05-12 10:37:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 10:37:24,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:37:24,610 INFO L175 Difference]: Start difference. First operand has 333 places, 466 transitions, 8265 flow. Second operand 10 states and 250 transitions. [2024-05-12 10:37:24,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 490 transitions, 9915 flow [2024-05-12 10:37:26,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 490 transitions, 9452 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-05-12 10:37:26,724 INFO L231 Difference]: Finished difference. Result has 340 places, 466 transitions, 8170 flow [2024-05-12 10:37:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7802, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8170, PETRI_PLACES=340, PETRI_TRANSITIONS=466} [2024-05-12 10:37:26,725 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-05-12 10:37:26,725 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 466 transitions, 8170 flow [2024-05-12 10:37:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:26,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:26,725 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] [2024-05-12 10:37:26,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:37:26,725 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:26,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1861396665, now seen corresponding path program 8 times [2024-05-12 10:37:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:26,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170879854] [2024-05-12 10:37:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:27,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170879854] [2024-05-12 10:37:27,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170879854] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:27,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:27,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:27,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480245720] [2024-05-12 10:37:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:27,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:27,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 466 transitions, 8170 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:27,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:27,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:27,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:28,412 INFO L124 PetriNetUnfolderBase]: 4412/7367 cut-off events. [2024-05-12 10:37:28,412 INFO L125 PetriNetUnfolderBase]: For 479646/479783 co-relation queries the response was YES. [2024-05-12 10:37:28,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52119 conditions, 7367 events. 4412/7367 cut-off events. For 479646/479783 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51891 event pairs, 1356 based on Foata normal form. 31/7049 useless extension candidates. Maximal degree in co-relation 51967. Up to 5900 conditions per place. [2024-05-12 10:37:28,519 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 217 selfloop transitions, 269 changer transitions 0/499 dead transitions. [2024-05-12 10:37:28,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 499 transitions, 10228 flow [2024-05-12 10:37:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 10:37:28,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:37:28,520 INFO L175 Difference]: Start difference. First operand has 340 places, 466 transitions, 8170 flow. Second operand 8 states and 216 transitions. [2024-05-12 10:37:28,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 499 transitions, 10228 flow [2024-05-12 10:37:30,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 499 transitions, 9874 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:30,863 INFO L231 Difference]: Finished difference. Result has 342 places, 476 transitions, 8582 flow [2024-05-12 10:37:30,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7816, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8582, PETRI_PLACES=342, PETRI_TRANSITIONS=476} [2024-05-12 10:37:30,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 292 predicate places. [2024-05-12 10:37:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 476 transitions, 8582 flow [2024-05-12 10:37:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:30,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:30,864 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] [2024-05-12 10:37:30,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:37:30,865 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1872241395, now seen corresponding path program 9 times [2024-05-12 10:37:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060908835] [2024-05-12 10:37:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:31,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:31,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060908835] [2024-05-12 10:37:31,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060908835] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:31,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291088554] [2024-05-12 10:37:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:31,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:31,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:31,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 476 transitions, 8582 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:31,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:31,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:31,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:32,530 INFO L124 PetriNetUnfolderBase]: 4425/7377 cut-off events. [2024-05-12 10:37:32,531 INFO L125 PetriNetUnfolderBase]: For 491657/491790 co-relation queries the response was YES. [2024-05-12 10:37:32,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52730 conditions, 7377 events. 4425/7377 cut-off events. For 491657/491790 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51861 event pairs, 1315 based on Foata normal form. 61/7064 useless extension candidates. Maximal degree in co-relation 52577. Up to 6382 conditions per place. [2024-05-12 10:37:32,639 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 365 selfloop transitions, 124 changer transitions 0/502 dead transitions. [2024-05-12 10:37:32,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 502 transitions, 10052 flow [2024-05-12 10:37:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:37:32,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:37:32,640 INFO L175 Difference]: Start difference. First operand has 342 places, 476 transitions, 8582 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:37:32,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 502 transitions, 10052 flow [2024-05-12 10:37:34,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 502 transitions, 9517 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:34,687 INFO L231 Difference]: Finished difference. Result has 345 places, 482 transitions, 8423 flow [2024-05-12 10:37:34,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8055, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8423, PETRI_PLACES=345, PETRI_TRANSITIONS=482} [2024-05-12 10:37:34,687 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 295 predicate places. [2024-05-12 10:37:34,687 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 482 transitions, 8423 flow [2024-05-12 10:37:34,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:34,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:34,688 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] [2024-05-12 10:37:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:37:34,688 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:34,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1560681539, now seen corresponding path program 3 times [2024-05-12 10:37:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:34,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457602200] [2024-05-12 10:37:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:35,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:35,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457602200] [2024-05-12 10:37:35,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457602200] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:35,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:35,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:35,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080050695] [2024-05-12 10:37:35,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:35,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:35,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:35,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:35,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 482 transitions, 8423 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:35,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:35,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:35,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:36,430 INFO L124 PetriNetUnfolderBase]: 4442/7399 cut-off events. [2024-05-12 10:37:36,430 INFO L125 PetriNetUnfolderBase]: For 501362/501511 co-relation queries the response was YES. [2024-05-12 10:37:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52571 conditions, 7399 events. 4442/7399 cut-off events. For 501362/501511 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51957 event pairs, 1313 based on Foata normal form. 64/7082 useless extension candidates. Maximal degree in co-relation 52417. Up to 6404 conditions per place. [2024-05-12 10:37:36,526 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 370 selfloop transitions, 127 changer transitions 0/510 dead transitions. [2024-05-12 10:37:36,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 510 transitions, 10099 flow [2024-05-12 10:37:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 10:37:36,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-05-12 10:37:36,528 INFO L175 Difference]: Start difference. First operand has 345 places, 482 transitions, 8423 flow. Second operand 9 states and 227 transitions. [2024-05-12 10:37:36,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 510 transitions, 10099 flow [2024-05-12 10:37:38,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 510 transitions, 9809 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:38,733 INFO L231 Difference]: Finished difference. Result has 349 places, 488 transitions, 8525 flow [2024-05-12 10:37:38,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8145, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8525, PETRI_PLACES=349, PETRI_TRANSITIONS=488} [2024-05-12 10:37:38,733 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-05-12 10:37:38,734 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 488 transitions, 8525 flow [2024-05-12 10:37:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:38,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:38,734 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] [2024-05-12 10:37:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:37:38,734 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:38,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1049043077, now seen corresponding path program 10 times [2024-05-12 10:37:38,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:38,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854264111] [2024-05-12 10:37:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:38,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:39,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854264111] [2024-05-12 10:37:39,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854264111] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:39,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:39,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663208559] [2024-05-12 10:37:39,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:39,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:39,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:39,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 488 transitions, 8525 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:39,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:39,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:39,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:40,439 INFO L124 PetriNetUnfolderBase]: 4439/7409 cut-off events. [2024-05-12 10:37:40,440 INFO L125 PetriNetUnfolderBase]: For 509379/509533 co-relation queries the response was YES. [2024-05-12 10:37:40,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52566 conditions, 7409 events. 4439/7409 cut-off events. For 509379/509533 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 52292 event pairs, 1358 based on Foata normal form. 32/7088 useless extension candidates. Maximal degree in co-relation 52411. Up to 5921 conditions per place. [2024-05-12 10:37:40,544 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 213 selfloop transitions, 284 changer transitions 0/510 dead transitions. [2024-05-12 10:37:40,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 510 transitions, 10243 flow [2024-05-12 10:37:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:37:40,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:37:40,545 INFO L175 Difference]: Start difference. First operand has 349 places, 488 transitions, 8525 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:37:40,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 510 transitions, 10243 flow [2024-05-12 10:37:43,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 510 transitions, 9978 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:43,141 INFO L231 Difference]: Finished difference. Result has 352 places, 488 transitions, 8834 flow [2024-05-12 10:37:43,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8260, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8834, PETRI_PLACES=352, PETRI_TRANSITIONS=488} [2024-05-12 10:37:43,141 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 302 predicate places. [2024-05-12 10:37:43,141 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 488 transitions, 8834 flow [2024-05-12 10:37:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:43,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:43,142 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] [2024-05-12 10:37:43,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:37:43,142 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:43,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1332567419, now seen corresponding path program 4 times [2024-05-12 10:37:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:43,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831334906] [2024-05-12 10:37:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:43,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:43,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831334906] [2024-05-12 10:37:43,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831334906] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:43,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:43,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963440015] [2024-05-12 10:37:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:43,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:43,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 488 transitions, 8834 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:43,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:43,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:43,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:44,890 INFO L124 PetriNetUnfolderBase]: 4456/7418 cut-off events. [2024-05-12 10:37:44,891 INFO L125 PetriNetUnfolderBase]: For 526482/526578 co-relation queries the response was YES. [2024-05-12 10:37:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53445 conditions, 7418 events. 4456/7418 cut-off events. For 526482/526578 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 52092 event pairs, 1308 based on Foata normal form. 35/7057 useless extension candidates. Maximal degree in co-relation 53288. Up to 6419 conditions per place. [2024-05-12 10:37:45,007 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 373 selfloop transitions, 131 changer transitions 0/517 dead transitions. [2024-05-12 10:37:45,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 517 transitions, 10688 flow [2024-05-12 10:37:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 10:37:45,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-05-12 10:37:45,008 INFO L175 Difference]: Start difference. First operand has 352 places, 488 transitions, 8834 flow. Second operand 9 states and 230 transitions. [2024-05-12 10:37:45,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 517 transitions, 10688 flow [2024-05-12 10:37:48,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 517 transitions, 10067 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:48,346 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 8593 flow [2024-05-12 10:37:48,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8593, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-05-12 10:37:48,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 304 predicate places. [2024-05-12 10:37:48,347 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 8593 flow [2024-05-12 10:37:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:48,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:48,347 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] [2024-05-12 10:37:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:37:48,348 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 358915113, now seen corresponding path program 11 times [2024-05-12 10:37:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:48,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279451642] [2024-05-12 10:37:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:48,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:48,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279451642] [2024-05-12 10:37:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279451642] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:48,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:48,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497264653] [2024-05-12 10:37:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:48,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:48,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:48,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:48,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:48,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 8593 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:48,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:48,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:48,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:50,089 INFO L124 PetriNetUnfolderBase]: 4453/7425 cut-off events. [2024-05-12 10:37:50,090 INFO L125 PetriNetUnfolderBase]: For 530223/530385 co-relation queries the response was YES. [2024-05-12 10:37:50,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52835 conditions, 7425 events. 4453/7425 cut-off events. For 530223/530385 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 52269 event pairs, 1318 based on Foata normal form. 67/7116 useless extension candidates. Maximal degree in co-relation 52677. Up to 6402 conditions per place. [2024-05-12 10:37:50,195 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 360 selfloop transitions, 142 changer transitions 0/515 dead transitions. [2024-05-12 10:37:50,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 515 transitions, 10163 flow [2024-05-12 10:37:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 10:37:50,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:37:50,196 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 8593 flow. Second operand 8 states and 208 transitions. [2024-05-12 10:37:50,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 515 transitions, 10163 flow [2024-05-12 10:37:53,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 515 transitions, 9817 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:53,066 INFO L231 Difference]: Finished difference. Result has 357 places, 494 transitions, 8537 flow [2024-05-12 10:37:53,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8247, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8537, PETRI_PLACES=357, PETRI_TRANSITIONS=494} [2024-05-12 10:37:53,069 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 307 predicate places. [2024-05-12 10:37:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 494 transitions, 8537 flow [2024-05-12 10:37:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:53,070 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] [2024-05-12 10:37:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:37:53,070 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:53,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1036841173, now seen corresponding path program 12 times [2024-05-12 10:37:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:53,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006267242] [2024-05-12 10:37:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006267242] [2024-05-12 10:37:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006267242] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:53,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:53,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:53,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132673371] [2024-05-12 10:37:53,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:53,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:53,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:53,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 494 transitions, 8537 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:53,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:54,870 INFO L124 PetriNetUnfolderBase]: 4450/7410 cut-off events. [2024-05-12 10:37:54,870 INFO L125 PetriNetUnfolderBase]: For 533667/533763 co-relation queries the response was YES. [2024-05-12 10:37:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52672 conditions, 7410 events. 4450/7410 cut-off events. For 533667/533763 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 51954 event pairs, 1299 based on Foata normal form. 45/7059 useless extension candidates. Maximal degree in co-relation 52514. Up to 6517 conditions per place. [2024-05-12 10:37:54,983 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 429 selfloop transitions, 73 changer transitions 0/515 dead transitions. [2024-05-12 10:37:54,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 515 transitions, 9591 flow [2024-05-12 10:37:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:37:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:37:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-05-12 10:37:54,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138339920948617 [2024-05-12 10:37:54,985 INFO L175 Difference]: Start difference. First operand has 357 places, 494 transitions, 8537 flow. Second operand 11 states and 260 transitions. [2024-05-12 10:37:54,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 515 transitions, 9591 flow [2024-05-12 10:37:57,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 515 transitions, 9275 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:57,758 INFO L231 Difference]: Finished difference. Result has 363 places, 494 transitions, 8373 flow [2024-05-12 10:37:57,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8373, PETRI_PLACES=363, PETRI_TRANSITIONS=494} [2024-05-12 10:37:57,759 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-05-12 10:37:57,759 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 494 transitions, 8373 flow [2024-05-12 10:37:57,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:57,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:57,759 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] [2024-05-12 10:37:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:37:57,760 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:57,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1041811397, now seen corresponding path program 12 times [2024-05-12 10:37:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:57,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139578110] [2024-05-12 10:37:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:58,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:58,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139578110] [2024-05-12 10:37:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139578110] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:58,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:58,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569600740] [2024-05-12 10:37:58,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:58,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:58,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:58,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 494 transitions, 8373 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:58,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:58,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:58,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:59,620 INFO L124 PetriNetUnfolderBase]: 4447/7413 cut-off events. [2024-05-12 10:37:59,620 INFO L125 PetriNetUnfolderBase]: For 539681/539843 co-relation queries the response was YES. [2024-05-12 10:37:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52401 conditions, 7413 events. 4447/7413 cut-off events. For 539681/539843 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52165 event pairs, 1318 based on Foata normal form. 67/7104 useless extension candidates. Maximal degree in co-relation 52242. Up to 6395 conditions per place. [2024-05-12 10:37:59,715 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 360 selfloop transitions, 143 changer transitions 0/516 dead transitions. [2024-05-12 10:37:59,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 516 transitions, 9783 flow [2024-05-12 10:37:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-05-12 10:37:59,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369565217391304 [2024-05-12 10:37:59,716 INFO L175 Difference]: Start difference. First operand has 363 places, 494 transitions, 8373 flow. Second operand 10 states and 247 transitions. [2024-05-12 10:37:59,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 516 transitions, 9783 flow [2024-05-12 10:38:02,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 516 transitions, 9613 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:02,876 INFO L231 Difference]: Finished difference. Result has 365 places, 494 transitions, 8495 flow [2024-05-12 10:38:02,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8495, PETRI_PLACES=365, PETRI_TRANSITIONS=494} [2024-05-12 10:38:02,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-05-12 10:38:02,876 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 494 transitions, 8495 flow [2024-05-12 10:38:02,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:02,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:02,877 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] [2024-05-12 10:38:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:38:02,877 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:02,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1037054515, now seen corresponding path program 5 times [2024-05-12 10:38:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030139292] [2024-05-12 10:38:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030139292] [2024-05-12 10:38:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030139292] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:03,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:03,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89787852] [2024-05-12 10:38:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:03,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:03,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 494 transitions, 8495 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:03,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:03,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:04,614 INFO L124 PetriNetUnfolderBase]: 4444/7410 cut-off events. [2024-05-12 10:38:04,614 INFO L125 PetriNetUnfolderBase]: For 547672/547834 co-relation queries the response was YES. [2024-05-12 10:38:04,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52609 conditions, 7410 events. 4444/7410 cut-off events. For 547672/547834 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52020 event pairs, 1318 based on Foata normal form. 67/7099 useless extension candidates. Maximal degree in co-relation 52449. Up to 6404 conditions per place. [2024-05-12 10:38:04,725 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 370 selfloop transitions, 131 changer transitions 0/514 dead transitions. [2024-05-12 10:38:04,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 514 transitions, 9901 flow [2024-05-12 10:38:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:38:04,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:38:04,726 INFO L175 Difference]: Start difference. First operand has 365 places, 494 transitions, 8495 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:38:04,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 514 transitions, 9901 flow [2024-05-12 10:38:07,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 514 transitions, 9587 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-05-12 10:38:07,522 INFO L231 Difference]: Finished difference. Result has 364 places, 494 transitions, 8449 flow [2024-05-12 10:38:07,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8449, PETRI_PLACES=364, PETRI_TRANSITIONS=494} [2024-05-12 10:38:07,533 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 314 predicate places. [2024-05-12 10:38:07,533 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 494 transitions, 8449 flow [2024-05-12 10:38:07,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:07,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:07,533 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] [2024-05-12 10:38:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:38:07,533 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:07,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1038315341, now seen corresponding path program 4 times [2024-05-12 10:38:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:07,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051452823] [2024-05-12 10:38:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:07,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051452823] [2024-05-12 10:38:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051452823] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:07,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:07,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:07,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019744468] [2024-05-12 10:38:07,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:07,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:07,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:07,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:07,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 494 transitions, 8449 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:07,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:07,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:07,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:09,254 INFO L124 PetriNetUnfolderBase]: 4518/7523 cut-off events. [2024-05-12 10:38:09,254 INFO L125 PetriNetUnfolderBase]: For 584315/584349 co-relation queries the response was YES. [2024-05-12 10:38:09,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53372 conditions, 7523 events. 4518/7523 cut-off events. For 584315/584349 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52861 event pairs, 1307 based on Foata normal form. 8/7121 useless extension candidates. Maximal degree in co-relation 53211. Up to 6616 conditions per place. [2024-05-12 10:38:09,370 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 457 selfloop transitions, 49 changer transitions 0/519 dead transitions. [2024-05-12 10:38:09,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 519 transitions, 9567 flow [2024-05-12 10:38:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 10:38:09,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-05-12 10:38:09,371 INFO L175 Difference]: Start difference. First operand has 364 places, 494 transitions, 8449 flow. Second operand 8 states and 203 transitions. [2024-05-12 10:38:09,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 519 transitions, 9567 flow [2024-05-12 10:38:12,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 519 transitions, 9297 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:12,536 INFO L231 Difference]: Finished difference. Result has 365 places, 495 transitions, 8302 flow [2024-05-12 10:38:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8179, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8302, PETRI_PLACES=365, PETRI_TRANSITIONS=495} [2024-05-12 10:38:12,536 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-05-12 10:38:12,536 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 495 transitions, 8302 flow [2024-05-12 10:38:12,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:12,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:12,537 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] [2024-05-12 10:38:12,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:38:12,537 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1037988911, now seen corresponding path program 5 times [2024-05-12 10:38:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204807425] [2024-05-12 10:38:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:12,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204807425] [2024-05-12 10:38:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204807425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576878273] [2024-05-12 10:38:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:12,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:12,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:12,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:12,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 495 transitions, 8302 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:12,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:12,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:12,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:14,289 INFO L124 PetriNetUnfolderBase]: 4663/7759 cut-off events. [2024-05-12 10:38:14,289 INFO L125 PetriNetUnfolderBase]: For 622419/622459 co-relation queries the response was YES. [2024-05-12 10:38:14,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55459 conditions, 7759 events. 4663/7759 cut-off events. For 622419/622459 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54842 event pairs, 1330 based on Foata normal form. 6/7348 useless extension candidates. Maximal degree in co-relation 55297. Up to 6664 conditions per place. [2024-05-12 10:38:14,402 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 462 selfloop transitions, 52 changer transitions 0/527 dead transitions. [2024-05-12 10:38:14,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 527 transitions, 9668 flow [2024-05-12 10:38:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 10:38:14,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:38:14,403 INFO L175 Difference]: Start difference. First operand has 365 places, 495 transitions, 8302 flow. Second operand 8 states and 208 transitions. [2024-05-12 10:38:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 527 transitions, 9668 flow [2024-05-12 10:38:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 527 transitions, 9563 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:17,890 INFO L231 Difference]: Finished difference. Result has 367 places, 497 transitions, 8347 flow [2024-05-12 10:38:17,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8197, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8347, PETRI_PLACES=367, PETRI_TRANSITIONS=497} [2024-05-12 10:38:17,890 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 317 predicate places. [2024-05-12 10:38:17,890 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 497 transitions, 8347 flow [2024-05-12 10:38:17,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:17,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:17,891 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] [2024-05-12 10:38:17,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:38:17,891 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:17,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1049040101, now seen corresponding path program 6 times [2024-05-12 10:38:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688516236] [2024-05-12 10:38:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:18,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688516236] [2024-05-12 10:38:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688516236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:18,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898075682] [2024-05-12 10:38:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:18,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:18,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:18,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 497 transitions, 8347 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:18,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:18,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:18,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:19,643 INFO L124 PetriNetUnfolderBase]: 4645/7733 cut-off events. [2024-05-12 10:38:19,643 INFO L125 PetriNetUnfolderBase]: For 609147/609190 co-relation queries the response was YES. [2024-05-12 10:38:19,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54669 conditions, 7733 events. 4645/7733 cut-off events. For 609147/609190 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54852 event pairs, 1349 based on Foata normal form. 8/7320 useless extension candidates. Maximal degree in co-relation 54506. Up to 6813 conditions per place. [2024-05-12 10:38:19,754 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 458 selfloop transitions, 50 changer transitions 0/521 dead transitions. [2024-05-12 10:38:19,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 521 transitions, 9451 flow [2024-05-12 10:38:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 10:38:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-05-12 10:38:19,756 INFO L175 Difference]: Start difference. First operand has 367 places, 497 transitions, 8347 flow. Second operand 8 states and 202 transitions. [2024-05-12 10:38:19,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 521 transitions, 9451 flow [2024-05-12 10:38:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 521 transitions, 9375 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:22,846 INFO L231 Difference]: Finished difference. Result has 371 places, 497 transitions, 8376 flow [2024-05-12 10:38:22,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8376, PETRI_PLACES=371, PETRI_TRANSITIONS=497} [2024-05-12 10:38:22,847 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-05-12 10:38:22,847 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 497 transitions, 8376 flow [2024-05-12 10:38:22,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:22,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:22,847 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] [2024-05-12 10:38:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:38:22,847 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:22,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1049439815, now seen corresponding path program 1 times [2024-05-12 10:38:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:22,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429711899] [2024-05-12 10:38:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429711899] [2024-05-12 10:38:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429711899] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:23,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:23,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183497119] [2024-05-12 10:38:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:23,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 497 transitions, 8376 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:24,696 INFO L124 PetriNetUnfolderBase]: 4698/7848 cut-off events. [2024-05-12 10:38:24,696 INFO L125 PetriNetUnfolderBase]: For 610363/610400 co-relation queries the response was YES. [2024-05-12 10:38:24,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55085 conditions, 7848 events. 4698/7848 cut-off events. For 610363/610400 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55803 event pairs, 1357 based on Foata normal form. 6/7435 useless extension candidates. Maximal degree in co-relation 54920. Up to 6659 conditions per place. [2024-05-12 10:38:24,800 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 462 selfloop transitions, 54 changer transitions 0/529 dead transitions. [2024-05-12 10:38:24,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 529 transitions, 9564 flow [2024-05-12 10:38:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:38:24,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:38:24,801 INFO L175 Difference]: Start difference. First operand has 371 places, 497 transitions, 8376 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:38:24,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 529 transitions, 9564 flow [2024-05-12 10:38:27,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 529 transitions, 9454 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:27,704 INFO L231 Difference]: Finished difference. Result has 373 places, 500 transitions, 8432 flow [2024-05-12 10:38:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8432, PETRI_PLACES=373, PETRI_TRANSITIONS=500} [2024-05-12 10:38:27,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-05-12 10:38:27,705 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 500 transitions, 8432 flow [2024-05-12 10:38:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:27,705 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] [2024-05-12 10:38:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:38:27,705 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1499360003, now seen corresponding path program 13 times [2024-05-12 10:38:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575865607] [2024-05-12 10:38:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:28,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:28,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575865607] [2024-05-12 10:38:28,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575865607] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:28,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:28,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:28,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642529452] [2024-05-12 10:38:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:28,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:28,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:28,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 500 transitions, 8432 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:29,705 INFO L124 PetriNetUnfolderBase]: 4695/7837 cut-off events. [2024-05-12 10:38:29,705 INFO L125 PetriNetUnfolderBase]: For 599125/599293 co-relation queries the response was YES. [2024-05-12 10:38:29,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55426 conditions, 7837 events. 4695/7837 cut-off events. For 599125/599293 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55829 event pairs, 1400 based on Foata normal form. 105/7539 useless extension candidates. Maximal degree in co-relation 55259. Up to 6732 conditions per place. [2024-05-12 10:38:29,799 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 357 selfloop transitions, 159 changer transitions 0/529 dead transitions. [2024-05-12 10:38:29,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 529 transitions, 9912 flow [2024-05-12 10:38:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:38:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:38:29,800 INFO L175 Difference]: Start difference. First operand has 373 places, 500 transitions, 8432 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:38:29,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 529 transitions, 9912 flow [2024-05-12 10:38:34,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 529 transitions, 9834 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:34,053 INFO L231 Difference]: Finished difference. Result has 377 places, 500 transitions, 8682 flow [2024-05-12 10:38:34,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8682, PETRI_PLACES=377, PETRI_TRANSITIONS=500} [2024-05-12 10:38:34,054 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 327 predicate places. [2024-05-12 10:38:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 500 transitions, 8682 flow [2024-05-12 10:38:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:34,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:34,054 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] [2024-05-12 10:38:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:38:34,054 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:34,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 427833339, now seen corresponding path program 13 times [2024-05-12 10:38:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:34,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908863217] [2024-05-12 10:38:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:34,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908863217] [2024-05-12 10:38:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908863217] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:34,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410033898] [2024-05-12 10:38:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:34,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:34,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 500 transitions, 8682 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:34,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:34,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:34,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:35,888 INFO L124 PetriNetUnfolderBase]: 4711/7863 cut-off events. [2024-05-12 10:38:35,889 INFO L125 PetriNetUnfolderBase]: For 617356/617524 co-relation queries the response was YES. [2024-05-12 10:38:35,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56175 conditions, 7863 events. 4711/7863 cut-off events. For 617356/617524 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56099 event pairs, 1416 based on Foata normal form. 68/7530 useless extension candidates. Maximal degree in co-relation 56006. Up to 6445 conditions per place. [2024-05-12 10:38:36,008 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 252 selfloop transitions, 272 changer transitions 0/537 dead transitions. [2024-05-12 10:38:36,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 10703 flow [2024-05-12 10:38:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-05-12 10:38:36,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-05-12 10:38:36,010 INFO L175 Difference]: Start difference. First operand has 377 places, 500 transitions, 8682 flow. Second operand 8 states and 223 transitions. [2024-05-12 10:38:36,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 10703 flow [2024-05-12 10:38:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 537 transitions, 10399 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:39,747 INFO L231 Difference]: Finished difference. Result has 380 places, 506 transitions, 9180 flow [2024-05-12 10:38:39,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8386, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9180, PETRI_PLACES=380, PETRI_TRANSITIONS=506} [2024-05-12 10:38:39,748 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-05-12 10:38:39,748 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 506 transitions, 9180 flow [2024-05-12 10:38:39,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:39,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:39,748 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] [2024-05-12 10:38:39,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:38:39,749 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:39,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 437087769, now seen corresponding path program 14 times [2024-05-12 10:38:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727811109] [2024-05-12 10:38:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:39,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:40,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727811109] [2024-05-12 10:38:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727811109] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:40,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:40,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105778977] [2024-05-12 10:38:40,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:40,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:40,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:40,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 506 transitions, 9180 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:40,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:40,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:40,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:41,677 INFO L124 PetriNetUnfolderBase]: 4705/7857 cut-off events. [2024-05-12 10:38:41,677 INFO L125 PetriNetUnfolderBase]: For 613099/613295 co-relation queries the response was YES. [2024-05-12 10:38:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56559 conditions, 7857 events. 4705/7857 cut-off events. For 613099/613295 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55942 event pairs, 1417 based on Foata normal form. 84/7540 useless extension candidates. Maximal degree in co-relation 56388. Up to 6440 conditions per place. [2024-05-12 10:38:41,797 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 251 selfloop transitions, 276 changer transitions 0/540 dead transitions. [2024-05-12 10:38:41,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 11266 flow [2024-05-12 10:38:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:38:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:38:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-05-12 10:38:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891304347826087 [2024-05-12 10:38:41,799 INFO L175 Difference]: Start difference. First operand has 380 places, 506 transitions, 9180 flow. Second operand 10 states and 271 transitions. [2024-05-12 10:38:41,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 11266 flow [2024-05-12 10:38:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 540 transitions, 10670 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:45,432 INFO L231 Difference]: Finished difference. Result has 382 places, 506 transitions, 9175 flow [2024-05-12 10:38:45,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8604, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9175, PETRI_PLACES=382, PETRI_TRANSITIONS=506} [2024-05-12 10:38:45,452 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-05-12 10:38:45,452 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 506 transitions, 9175 flow [2024-05-12 10:38:45,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:45,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:45,452 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] [2024-05-12 10:38:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:38:45,452 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:45,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1608272829, now seen corresponding path program 6 times [2024-05-12 10:38:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:45,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056137757] [2024-05-12 10:38:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:45,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056137757] [2024-05-12 10:38:45,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056137757] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:45,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43336695] [2024-05-12 10:38:45,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:45,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:45,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:45,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:45,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 506 transitions, 9175 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:45,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:45,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:45,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:47,339 INFO L124 PetriNetUnfolderBase]: 4702/7847 cut-off events. [2024-05-12 10:38:47,339 INFO L125 PetriNetUnfolderBase]: For 592136/592319 co-relation queries the response was YES. [2024-05-12 10:38:47,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56328 conditions, 7847 events. 4702/7847 cut-off events. For 592136/592319 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55920 event pairs, 1412 based on Foata normal form. 83/7521 useless extension candidates. Maximal degree in co-relation 56157. Up to 6803 conditions per place. [2024-05-12 10:38:47,453 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 380 selfloop transitions, 132 changer transitions 0/525 dead transitions. [2024-05-12 10:38:47,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 525 transitions, 10621 flow [2024-05-12 10:38:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:38:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:38:47,454 INFO L175 Difference]: Start difference. First operand has 382 places, 506 transitions, 9175 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:38:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 525 transitions, 10621 flow [2024-05-12 10:38:50,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 525 transitions, 9771 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-05-12 10:38:50,792 INFO L231 Difference]: Finished difference. Result has 375 places, 506 transitions, 8619 flow [2024-05-12 10:38:50,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8619, PETRI_PLACES=375, PETRI_TRANSITIONS=506} [2024-05-12 10:38:50,793 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 325 predicate places. [2024-05-12 10:38:50,793 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 506 transitions, 8619 flow [2024-05-12 10:38:50,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:50,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:50,793 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] [2024-05-12 10:38:50,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:38:50,794 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:50,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash -868394479, now seen corresponding path program 15 times [2024-05-12 10:38:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:50,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490284600] [2024-05-12 10:38:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:51,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:51,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490284600] [2024-05-12 10:38:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490284600] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:51,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546341916] [2024-05-12 10:38:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:51,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:51,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 506 transitions, 8619 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:51,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:51,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:51,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:52,666 INFO L124 PetriNetUnfolderBase]: 4696/7846 cut-off events. [2024-05-12 10:38:52,667 INFO L125 PetriNetUnfolderBase]: For 558850/559042 co-relation queries the response was YES. [2024-05-12 10:38:52,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55166 conditions, 7846 events. 4696/7846 cut-off events. For 558850/559042 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55967 event pairs, 1416 based on Foata normal form. 84/7529 useless extension candidates. Maximal degree in co-relation 54998. Up to 6433 conditions per place. [2024-05-12 10:38:52,794 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 244 selfloop transitions, 283 changer transitions 0/540 dead transitions. [2024-05-12 10:38:52,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 540 transitions, 10491 flow [2024-05-12 10:38:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-05-12 10:38:52,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711462450592886 [2024-05-12 10:38:52,796 INFO L175 Difference]: Start difference. First operand has 375 places, 506 transitions, 8619 flow. Second operand 11 states and 289 transitions. [2024-05-12 10:38:52,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 540 transitions, 10491 flow [2024-05-12 10:38:56,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 540 transitions, 10149 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-05-12 10:38:56,037 INFO L231 Difference]: Finished difference. Result has 376 places, 506 transitions, 8890 flow [2024-05-12 10:38:56,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8890, PETRI_PLACES=376, PETRI_TRANSITIONS=506} [2024-05-12 10:38:56,037 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-05-12 10:38:56,037 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 506 transitions, 8890 flow [2024-05-12 10:38:56,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:56,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:56,038 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] [2024-05-12 10:38:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:38:56,038 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:56,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash -663344359, now seen corresponding path program 7 times [2024-05-12 10:38:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:56,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817719803] [2024-05-12 10:38:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:56,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817719803] [2024-05-12 10:38:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817719803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:56,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:56,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450045194] [2024-05-12 10:38:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:56,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:56,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 506 transitions, 8890 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:56,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:56,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:56,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:57,880 INFO L124 PetriNetUnfolderBase]: 4693/7836 cut-off events. [2024-05-12 10:38:57,880 INFO L125 PetriNetUnfolderBase]: For 531479/531587 co-relation queries the response was YES. [2024-05-12 10:38:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55318 conditions, 7836 events. 4693/7836 cut-off events. For 531479/531587 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55861 event pairs, 1406 based on Foata normal form. 39/7454 useless extension candidates. Maximal degree in co-relation 55152. Up to 6792 conditions per place. [2024-05-12 10:38:58,000 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 381 selfloop transitions, 131 changer transitions 0/525 dead transitions. [2024-05-12 10:38:58,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 525 transitions, 10320 flow [2024-05-12 10:38:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:38:58,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:38:58,001 INFO L175 Difference]: Start difference. First operand has 376 places, 506 transitions, 8890 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:38:58,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 525 transitions, 10320 flow [2024-05-12 10:39:00,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 525 transitions, 9763 flow, removed 16 selfloop flow, removed 13 redundant places. [2024-05-12 10:39:00,692 INFO L231 Difference]: Finished difference. Result has 370 places, 506 transitions, 8625 flow [2024-05-12 10:39:00,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8349, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8625, PETRI_PLACES=370, PETRI_TRANSITIONS=506} [2024-05-12 10:39:00,692 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-05-12 10:39:00,692 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 506 transitions, 8625 flow [2024-05-12 10:39:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:00,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:00,693 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] [2024-05-12 10:39:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:39:00,693 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:00,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:00,693 INFO L85 PathProgramCache]: Analyzing trace with hash 437093163, now seen corresponding path program 14 times [2024-05-12 10:39:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269973522] [2024-05-12 10:39:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:00,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:01,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269973522] [2024-05-12 10:39:01,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269973522] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:01,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243775094] [2024-05-12 10:39:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:01,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:01,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 506 transitions, 8625 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:01,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:01,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:02,606 INFO L124 PetriNetUnfolderBase]: 4690/7832 cut-off events. [2024-05-12 10:39:02,606 INFO L125 PetriNetUnfolderBase]: For 496889/496997 co-relation queries the response was YES. [2024-05-12 10:39:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54363 conditions, 7832 events. 4690/7832 cut-off events. For 496889/496997 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55803 event pairs, 1397 based on Foata normal form. 57/7468 useless extension candidates. Maximal degree in co-relation 54200. Up to 6725 conditions per place. [2024-05-12 10:39:02,715 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 162 changer transitions 0/539 dead transitions. [2024-05-12 10:39:02,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 539 transitions, 10279 flow [2024-05-12 10:39:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-05-12 10:39:02,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549407114624506 [2024-05-12 10:39:02,716 INFO L175 Difference]: Start difference. First operand has 370 places, 506 transitions, 8625 flow. Second operand 11 states and 278 transitions. [2024-05-12 10:39:02,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 539 transitions, 10279 flow [2024-05-12 10:39:05,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 539 transitions, 9938 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:05,647 INFO L231 Difference]: Finished difference. Result has 373 places, 506 transitions, 8634 flow [2024-05-12 10:39:05,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8296, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8634, PETRI_PLACES=373, PETRI_TRANSITIONS=506} [2024-05-12 10:39:05,648 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-05-12 10:39:05,648 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 506 transitions, 8634 flow [2024-05-12 10:39:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:05,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:05,648 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] [2024-05-12 10:39:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:39:05,648 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:05,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash -868405825, now seen corresponding path program 15 times [2024-05-12 10:39:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392561038] [2024-05-12 10:39:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392561038] [2024-05-12 10:39:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392561038] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:06,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:06,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520302398] [2024-05-12 10:39:06,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:06,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:06,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:06,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:06,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 506 transitions, 8634 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:06,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:06,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:06,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:07,639 INFO L124 PetriNetUnfolderBase]: 4687/7826 cut-off events. [2024-05-12 10:39:07,639 INFO L125 PetriNetUnfolderBase]: For 482710/482818 co-relation queries the response was YES. [2024-05-12 10:39:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54243 conditions, 7826 events. 4687/7826 cut-off events. For 482710/482818 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55838 event pairs, 1397 based on Foata normal form. 57/7462 useless extension candidates. Maximal degree in co-relation 54082. Up to 6722 conditions per place. [2024-05-12 10:39:07,740 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 162 changer transitions 0/540 dead transitions. [2024-05-12 10:39:07,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 540 transitions, 10114 flow [2024-05-12 10:39:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:39:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:39:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 319 transitions. [2024-05-12 10:39:07,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334448160535117 [2024-05-12 10:39:07,741 INFO L175 Difference]: Start difference. First operand has 373 places, 506 transitions, 8634 flow. Second operand 13 states and 319 transitions. [2024-05-12 10:39:07,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 540 transitions, 10114 flow [2024-05-12 10:39:10,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 540 transitions, 9766 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-05-12 10:39:10,166 INFO L231 Difference]: Finished difference. Result has 376 places, 506 transitions, 8632 flow [2024-05-12 10:39:10,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8632, PETRI_PLACES=376, PETRI_TRANSITIONS=506} [2024-05-12 10:39:10,168 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-05-12 10:39:10,168 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 506 transitions, 8632 flow [2024-05-12 10:39:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:10,168 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] [2024-05-12 10:39:10,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:39:10,168 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1024128775, now seen corresponding path program 8 times [2024-05-12 10:39:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908210078] [2024-05-12 10:39:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:10,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908210078] [2024-05-12 10:39:10,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908210078] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:10,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:10,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076741959] [2024-05-12 10:39:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:10,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:10,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:10,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:10,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 506 transitions, 8632 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:10,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:10,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:11,971 INFO L124 PetriNetUnfolderBase]: 4694/7853 cut-off events. [2024-05-12 10:39:11,971 INFO L125 PetriNetUnfolderBase]: For 477245/477552 co-relation queries the response was YES. [2024-05-12 10:39:12,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54242 conditions, 7853 events. 4694/7853 cut-off events. For 477245/477552 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56093 event pairs, 1424 based on Foata normal form. 124/7563 useless extension candidates. Maximal degree in co-relation 54081. Up to 6792 conditions per place. [2024-05-12 10:39:12,087 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 385 selfloop transitions, 128 changer transitions 0/526 dead transitions. [2024-05-12 10:39:12,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 526 transitions, 10261 flow [2024-05-12 10:39:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 10:39:12,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:39:12,088 INFO L175 Difference]: Start difference. First operand has 376 places, 506 transitions, 8632 flow. Second operand 7 states and 182 transitions. [2024-05-12 10:39:12,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 526 transitions, 10261 flow [2024-05-12 10:39:14,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 526 transitions, 9915 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-05-12 10:39:14,928 INFO L231 Difference]: Finished difference. Result has 370 places, 509 transitions, 8613 flow [2024-05-12 10:39:14,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8298, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8613, PETRI_PLACES=370, PETRI_TRANSITIONS=509} [2024-05-12 10:39:14,929 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-05-12 10:39:14,929 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 509 transitions, 8613 flow [2024-05-12 10:39:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:14,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:14,929 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] [2024-05-12 10:39:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:39:14,930 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1908026029, now seen corresponding path program 16 times [2024-05-12 10:39:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:14,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034038581] [2024-05-12 10:39:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:15,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034038581] [2024-05-12 10:39:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034038581] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:15,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:15,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:15,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849316509] [2024-05-12 10:39:15,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:15,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:15,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 509 transitions, 8613 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:15,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:15,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:15,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:16,815 INFO L124 PetriNetUnfolderBase]: 4691/7847 cut-off events. [2024-05-12 10:39:16,816 INFO L125 PetriNetUnfolderBase]: For 463886/464189 co-relation queries the response was YES. [2024-05-12 10:39:16,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53901 conditions, 7847 events. 4691/7847 cut-off events. For 463886/464189 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55997 event pairs, 1407 based on Foata normal form. 168/7601 useless extension candidates. Maximal degree in co-relation 53740. Up to 6728 conditions per place. [2024-05-12 10:39:16,928 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 363 selfloop transitions, 160 changer transitions 0/536 dead transitions. [2024-05-12 10:39:16,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 536 transitions, 9893 flow [2024-05-12 10:39:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:39:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:39:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-05-12 10:39:16,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413043478260869 [2024-05-12 10:39:16,929 INFO L175 Difference]: Start difference. First operand has 370 places, 509 transitions, 8613 flow. Second operand 10 states and 249 transitions. [2024-05-12 10:39:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 536 transitions, 9893 flow [2024-05-12 10:39:20,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 536 transitions, 9507 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:20,093 INFO L231 Difference]: Finished difference. Result has 374 places, 509 transitions, 8553 flow [2024-05-12 10:39:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8227, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8553, PETRI_PLACES=374, PETRI_TRANSITIONS=509} [2024-05-12 10:39:20,093 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 324 predicate places. [2024-05-12 10:39:20,093 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 509 transitions, 8553 flow [2024-05-12 10:39:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:20,094 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] [2024-05-12 10:39:20,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:39:20,094 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:20,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2042439135, now seen corresponding path program 9 times [2024-05-12 10:39:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:20,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172964285] [2024-05-12 10:39:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172964285] [2024-05-12 10:39:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172964285] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878692654] [2024-05-12 10:39:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:20,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:20,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 509 transitions, 8553 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:20,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:20,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:20,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:21,898 INFO L124 PetriNetUnfolderBase]: 4688/7847 cut-off events. [2024-05-12 10:39:21,898 INFO L125 PetriNetUnfolderBase]: For 469494/469820 co-relation queries the response was YES. [2024-05-12 10:39:21,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53742 conditions, 7847 events. 4688/7847 cut-off events. For 469494/469820 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56126 event pairs, 1426 based on Foata normal form. 134/7571 useless extension candidates. Maximal degree in co-relation 53581. Up to 6785 conditions per place. [2024-05-12 10:39:22,017 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 384 selfloop transitions, 128 changer transitions 0/525 dead transitions. [2024-05-12 10:39:22,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 525 transitions, 9955 flow [2024-05-12 10:39:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 10:39:22,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590062111801242 [2024-05-12 10:39:22,019 INFO L175 Difference]: Start difference. First operand has 374 places, 509 transitions, 8553 flow. Second operand 7 states and 180 transitions. [2024-05-12 10:39:22,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 525 transitions, 9955 flow [2024-05-12 10:39:24,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 525 transitions, 9657 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:24,505 INFO L231 Difference]: Finished difference. Result has 374 places, 509 transitions, 8517 flow [2024-05-12 10:39:24,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8255, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8517, PETRI_PLACES=374, PETRI_TRANSITIONS=509} [2024-05-12 10:39:24,505 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 324 predicate places. [2024-05-12 10:39:24,506 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 509 transitions, 8517 flow [2024-05-12 10:39:24,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:24,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:24,506 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] [2024-05-12 10:39:24,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:39:24,507 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:24,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -342553823, now seen corresponding path program 10 times [2024-05-12 10:39:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742245960] [2024-05-12 10:39:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:24,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:24,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:24,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742245960] [2024-05-12 10:39:24,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742245960] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:24,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374811553] [2024-05-12 10:39:24,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:24,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:24,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:24,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 509 transitions, 8517 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:24,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:24,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:24,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:26,314 INFO L124 PetriNetUnfolderBase]: 4685/7820 cut-off events. [2024-05-12 10:39:26,315 INFO L125 PetriNetUnfolderBase]: For 469721/469801 co-relation queries the response was YES. [2024-05-12 10:39:26,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53583 conditions, 7820 events. 4685/7820 cut-off events. For 469721/469801 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55650 event pairs, 1381 based on Foata normal form. 30/7419 useless extension candidates. Maximal degree in co-relation 53421. Up to 6868 conditions per place. [2024-05-12 10:39:26,435 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 444 selfloop transitions, 73 changer transitions 0/530 dead transitions. [2024-05-12 10:39:26,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 530 transitions, 9775 flow [2024-05-12 10:39:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:39:26,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:39:26,436 INFO L175 Difference]: Start difference. First operand has 374 places, 509 transitions, 8517 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:39:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 530 transitions, 9775 flow [2024-05-12 10:39:29,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 530 transitions, 9503 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:29,229 INFO L231 Difference]: Finished difference. Result has 375 places, 509 transitions, 8397 flow [2024-05-12 10:39:29,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8245, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8397, PETRI_PLACES=375, PETRI_TRANSITIONS=509} [2024-05-12 10:39:29,230 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 325 predicate places. [2024-05-12 10:39:29,230 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 509 transitions, 8397 flow [2024-05-12 10:39:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:29,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:29,231 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] [2024-05-12 10:39:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:39:29,231 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -858854507, now seen corresponding path program 17 times [2024-05-12 10:39:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795424309] [2024-05-12 10:39:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:29,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795424309] [2024-05-12 10:39:29,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795424309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:29,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:29,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688685001] [2024-05-12 10:39:29,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:29,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:29,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 509 transitions, 8397 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:29,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:29,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:29,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:31,074 INFO L124 PetriNetUnfolderBase]: 4690/7828 cut-off events. [2024-05-12 10:39:31,075 INFO L125 PetriNetUnfolderBase]: For 478183/478263 co-relation queries the response was YES. [2024-05-12 10:39:31,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53530 conditions, 7828 events. 4690/7828 cut-off events. For 478183/478263 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55749 event pairs, 1381 based on Foata normal form. 22/7416 useless extension candidates. Maximal degree in co-relation 53367. Up to 6852 conditions per place. [2024-05-12 10:39:31,190 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 450 selfloop transitions, 78 changer transitions 0/541 dead transitions. [2024-05-12 10:39:31,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 541 transitions, 9827 flow [2024-05-12 10:39:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:39:31,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:39:31,192 INFO L175 Difference]: Start difference. First operand has 375 places, 509 transitions, 8397 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:39:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 541 transitions, 9827 flow [2024-05-12 10:39:34,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 541 transitions, 9623 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:34,154 INFO L231 Difference]: Finished difference. Result has 376 places, 515 transitions, 8539 flow [2024-05-12 10:39:34,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8539, PETRI_PLACES=376, PETRI_TRANSITIONS=515} [2024-05-12 10:39:34,155 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-05-12 10:39:34,155 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 515 transitions, 8539 flow [2024-05-12 10:39:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:34,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:34,155 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] [2024-05-12 10:39:34,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:39:34,156 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:34,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1524627669, now seen corresponding path program 11 times [2024-05-12 10:39:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:34,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595924156] [2024-05-12 10:39:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595924156] [2024-05-12 10:39:34,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595924156] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:34,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:34,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:34,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45869879] [2024-05-12 10:39:34,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:34,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:34,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:34,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:34,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 515 transitions, 8539 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:34,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:34,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:34,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:36,039 INFO L124 PetriNetUnfolderBase]: 4687/7824 cut-off events. [2024-05-12 10:39:36,039 INFO L125 PetriNetUnfolderBase]: For 480770/480856 co-relation queries the response was YES. [2024-05-12 10:39:36,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53665 conditions, 7824 events. 4687/7824 cut-off events. For 480770/480856 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55649 event pairs, 1381 based on Foata normal form. 30/7420 useless extension candidates. Maximal degree in co-relation 53500. Up to 6871 conditions per place. [2024-05-12 10:39:36,148 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 445 selfloop transitions, 77 changer transitions 0/535 dead transitions. [2024-05-12 10:39:36,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 535 transitions, 9633 flow [2024-05-12 10:39:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:39:36,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:39:36,150 INFO L175 Difference]: Start difference. First operand has 376 places, 515 transitions, 8539 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:39:36,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 535 transitions, 9633 flow [2024-05-12 10:39:38,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 535 transitions, 9544 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 10:39:38,583 INFO L231 Difference]: Finished difference. Result has 381 places, 515 transitions, 8611 flow [2024-05-12 10:39:38,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8450, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8611, PETRI_PLACES=381, PETRI_TRANSITIONS=515} [2024-05-12 10:39:38,583 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 331 predicate places. [2024-05-12 10:39:38,583 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 515 transitions, 8611 flow [2024-05-12 10:39:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:38,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:38,584 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] [2024-05-12 10:39:38,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:39:38,584 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:38,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1524627855, now seen corresponding path program 16 times [2024-05-12 10:39:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:38,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395202297] [2024-05-12 10:39:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:38,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:38,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:38,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395202297] [2024-05-12 10:39:38,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395202297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:38,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:38,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:38,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979826274] [2024-05-12 10:39:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:38,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:39,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:39,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 515 transitions, 8611 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:39,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:39,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:39,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:40,574 INFO L124 PetriNetUnfolderBase]: 4749/7917 cut-off events. [2024-05-12 10:39:40,575 INFO L125 PetriNetUnfolderBase]: For 510005/510091 co-relation queries the response was YES. [2024-05-12 10:39:40,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54881 conditions, 7917 events. 4749/7917 cut-off events. For 510005/510091 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56378 event pairs, 1381 based on Foata normal form. 31/7496 useless extension candidates. Maximal degree in co-relation 54715. Up to 6866 conditions per place. [2024-05-12 10:39:40,667 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 438 selfloop transitions, 106 changer transitions 0/557 dead transitions. [2024-05-12 10:39:40,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 557 transitions, 10699 flow [2024-05-12 10:39:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:39:40,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 10:39:40,668 INFO L175 Difference]: Start difference. First operand has 381 places, 515 transitions, 8611 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:39:40,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 557 transitions, 10699 flow [2024-05-12 10:39:43,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 557 transitions, 10415 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:43,695 INFO L231 Difference]: Finished difference. Result has 382 places, 532 transitions, 9012 flow [2024-05-12 10:39:43,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8361, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9012, PETRI_PLACES=382, PETRI_TRANSITIONS=532} [2024-05-12 10:39:43,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-05-12 10:39:43,696 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 532 transitions, 9012 flow [2024-05-12 10:39:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:43,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:43,696 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] [2024-05-12 10:39:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:39:43,696 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:43,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -350326949, now seen corresponding path program 17 times [2024-05-12 10:39:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:43,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712041734] [2024-05-12 10:39:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:44,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:44,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712041734] [2024-05-12 10:39:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712041734] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:44,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:44,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:44,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210152921] [2024-05-12 10:39:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:44,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:44,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:44,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:44,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 532 transitions, 9012 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:44,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:44,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:44,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:45,584 INFO L124 PetriNetUnfolderBase]: 4743/7911 cut-off events. [2024-05-12 10:39:45,585 INFO L125 PetriNetUnfolderBase]: For 502666/502752 co-relation queries the response was YES. [2024-05-12 10:39:45,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54603 conditions, 7911 events. 4743/7911 cut-off events. For 502666/502752 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56329 event pairs, 1381 based on Foata normal form. 31/7490 useless extension candidates. Maximal degree in co-relation 54436. Up to 6861 conditions per place. [2024-05-12 10:39:45,697 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 438 selfloop transitions, 111 changer transitions 0/562 dead transitions. [2024-05-12 10:39:45,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 562 transitions, 10554 flow [2024-05-12 10:39:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:39:45,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:39:45,698 INFO L175 Difference]: Start difference. First operand has 382 places, 532 transitions, 9012 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:39:45,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 562 transitions, 10554 flow [2024-05-12 10:39:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 562 transitions, 10400 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-05-12 10:39:48,401 INFO L231 Difference]: Finished difference. Result has 387 places, 532 transitions, 9095 flow [2024-05-12 10:39:48,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8862, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9095, PETRI_PLACES=387, PETRI_TRANSITIONS=532} [2024-05-12 10:39:48,402 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 337 predicate places. [2024-05-12 10:39:48,402 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 532 transitions, 9095 flow [2024-05-12 10:39:48,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:48,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:48,402 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] [2024-05-12 10:39:48,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:39:48,402 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:48,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1524633621, now seen corresponding path program 18 times [2024-05-12 10:39:48,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:48,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380139517] [2024-05-12 10:39:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:48,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:48,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:48,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380139517] [2024-05-12 10:39:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380139517] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:48,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:48,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:48,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036951788] [2024-05-12 10:39:48,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:48,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:48,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:48,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:48,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:48,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 532 transitions, 9095 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:48,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:48,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:48,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:50,269 INFO L124 PetriNetUnfolderBase]: 4737/7903 cut-off events. [2024-05-12 10:39:50,269 INFO L125 PetriNetUnfolderBase]: For 494141/494227 co-relation queries the response was YES. [2024-05-12 10:39:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54522 conditions, 7903 events. 4737/7903 cut-off events. For 494141/494227 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56205 event pairs, 1381 based on Foata normal form. 31/7482 useless extension candidates. Maximal degree in co-relation 54354. Up to 6913 conditions per place. [2024-05-12 10:39:50,388 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 463 selfloop transitions, 78 changer transitions 0/554 dead transitions. [2024-05-12 10:39:50,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 554 transitions, 10233 flow [2024-05-12 10:39:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:39:50,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:39:50,389 INFO L175 Difference]: Start difference. First operand has 387 places, 532 transitions, 9095 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:39:50,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 554 transitions, 10233 flow [2024-05-12 10:39:52,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 554 transitions, 10125 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:52,959 INFO L231 Difference]: Finished difference. Result has 390 places, 532 transitions, 9157 flow [2024-05-12 10:39:52,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9157, PETRI_PLACES=390, PETRI_TRANSITIONS=532} [2024-05-12 10:39:52,959 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 340 predicate places. [2024-05-12 10:39:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 532 transitions, 9157 flow [2024-05-12 10:39:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:52,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:52,960 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] [2024-05-12 10:39:52,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:39:52,960 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:52,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1522293153, now seen corresponding path program 19 times [2024-05-12 10:39:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:52,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052532832] [2024-05-12 10:39:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:53,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:53,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052532832] [2024-05-12 10:39:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052532832] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:53,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:53,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694775517] [2024-05-12 10:39:53,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:53,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:53,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 532 transitions, 9157 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:54,856 INFO L124 PetriNetUnfolderBase]: 4742/7909 cut-off events. [2024-05-12 10:39:54,856 INFO L125 PetriNetUnfolderBase]: For 492203/492289 co-relation queries the response was YES. [2024-05-12 10:39:54,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54497 conditions, 7909 events. 4742/7909 cut-off events. For 492203/492289 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56341 event pairs, 1381 based on Foata normal form. 22/7476 useless extension candidates. Maximal degree in co-relation 54329. Up to 6842 conditions per place. [2024-05-12 10:39:54,968 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 431 selfloop transitions, 117 changer transitions 0/561 dead transitions. [2024-05-12 10:39:54,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 561 transitions, 10559 flow [2024-05-12 10:39:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:39:54,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:39:54,970 INFO L175 Difference]: Start difference. First operand has 390 places, 532 transitions, 9157 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:39:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 561 transitions, 10559 flow [2024-05-12 10:39:58,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 561 transitions, 10366 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:58,594 INFO L231 Difference]: Finished difference. Result has 391 places, 535 transitions, 9286 flow [2024-05-12 10:39:58,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8964, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9286, PETRI_PLACES=391, PETRI_TRANSITIONS=535} [2024-05-12 10:39:58,594 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 341 predicate places. [2024-05-12 10:39:58,594 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 535 transitions, 9286 flow [2024-05-12 10:39:58,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:58,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:58,595 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] [2024-05-12 10:39:58,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:39:58,595 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:58,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1313003757, now seen corresponding path program 18 times [2024-05-12 10:39:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:58,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143724535] [2024-05-12 10:39:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143724535] [2024-05-12 10:39:58,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143724535] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:58,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:58,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:58,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704822020] [2024-05-12 10:39:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:58,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:58,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:59,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:59,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 535 transitions, 9286 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:59,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:59,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:59,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:00,461 INFO L124 PetriNetUnfolderBase]: 4749/7918 cut-off events. [2024-05-12 10:40:00,461 INFO L125 PetriNetUnfolderBase]: For 497635/497724 co-relation queries the response was YES. [2024-05-12 10:40:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54872 conditions, 7918 events. 4749/7918 cut-off events. For 497635/497724 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 56329 event pairs, 1381 based on Foata normal form. 30/7491 useless extension candidates. Maximal degree in co-relation 54703. Up to 6925 conditions per place. [2024-05-12 10:40:00,582 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 456 selfloop transitions, 97 changer transitions 0/566 dead transitions. [2024-05-12 10:40:00,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 566 transitions, 10726 flow [2024-05-12 10:40:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:40:00,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:40:00,583 INFO L175 Difference]: Start difference. First operand has 391 places, 535 transitions, 9286 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:40:00,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 566 transitions, 10726 flow [2024-05-12 10:40:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 566 transitions, 10539 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:04,178 INFO L231 Difference]: Finished difference. Result has 394 places, 538 transitions, 9387 flow [2024-05-12 10:40:04,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9103, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9387, PETRI_PLACES=394, PETRI_TRANSITIONS=538} [2024-05-12 10:40:04,179 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 344 predicate places. [2024-05-12 10:40:04,179 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 538 transitions, 9387 flow [2024-05-12 10:40:04,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:04,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:04,179 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] [2024-05-12 10:40:04,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:40:04,180 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:04,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1529656149, now seen corresponding path program 19 times [2024-05-12 10:40:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:04,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513694677] [2024-05-12 10:40:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513694677] [2024-05-12 10:40:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513694677] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162250871] [2024-05-12 10:40:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:04,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:04,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 538 transitions, 9387 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:04,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:04,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:04,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:06,049 INFO L124 PetriNetUnfolderBase]: 4762/7939 cut-off events. [2024-05-12 10:40:06,049 INFO L125 PetriNetUnfolderBase]: For 489380/489466 co-relation queries the response was YES. [2024-05-12 10:40:06,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54853 conditions, 7939 events. 4762/7939 cut-off events. For 489380/489466 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 56623 event pairs, 1381 based on Foata normal form. 30/7509 useless extension candidates. Maximal degree in co-relation 54685. Up to 6958 conditions per place. [2024-05-12 10:40:06,171 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 464 selfloop transitions, 88 changer transitions 0/565 dead transitions. [2024-05-12 10:40:06,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 565 transitions, 10675 flow [2024-05-12 10:40:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:40:06,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:40:06,172 INFO L175 Difference]: Start difference. First operand has 394 places, 538 transitions, 9387 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:40:06,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 565 transitions, 10675 flow [2024-05-12 10:40:08,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 565 transitions, 10401 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:08,900 INFO L231 Difference]: Finished difference. Result has 396 places, 544 transitions, 9433 flow [2024-05-12 10:40:08,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9125, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9433, PETRI_PLACES=396, PETRI_TRANSITIONS=544} [2024-05-12 10:40:08,901 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 346 predicate places. [2024-05-12 10:40:08,901 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 544 transitions, 9433 flow [2024-05-12 10:40:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:08,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:08,902 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] [2024-05-12 10:40:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 10:40:08,902 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:08,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1522298733, now seen corresponding path program 20 times [2024-05-12 10:40:08,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:08,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406012082] [2024-05-12 10:40:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:09,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406012082] [2024-05-12 10:40:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406012082] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:09,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:09,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637992822] [2024-05-12 10:40:09,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:09,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:09,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 544 transitions, 9433 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:09,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:09,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:09,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:10,905 INFO L124 PetriNetUnfolderBase]: 4756/7931 cut-off events. [2024-05-12 10:40:10,905 INFO L125 PetriNetUnfolderBase]: For 493429/493515 co-relation queries the response was YES. [2024-05-12 10:40:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54611 conditions, 7931 events. 4756/7931 cut-off events. For 493429/493515 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 56399 event pairs, 1381 based on Foata normal form. 31/7502 useless extension candidates. Maximal degree in co-relation 54442. Up to 6862 conditions per place. [2024-05-12 10:40:11,027 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 438 selfloop transitions, 126 changer transitions 0/577 dead transitions. [2024-05-12 10:40:11,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 577 transitions, 10645 flow [2024-05-12 10:40:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 10:40:11,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:40:11,029 INFO L175 Difference]: Start difference. First operand has 396 places, 544 transitions, 9433 flow. Second operand 8 states and 224 transitions. [2024-05-12 10:40:11,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 577 transitions, 10645 flow [2024-05-12 10:40:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 577 transitions, 10393 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:13,847 INFO L231 Difference]: Finished difference. Result has 398 places, 544 transitions, 9459 flow [2024-05-12 10:40:13,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9181, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9459, PETRI_PLACES=398, PETRI_TRANSITIONS=544} [2024-05-12 10:40:13,848 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 348 predicate places. [2024-05-12 10:40:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 544 transitions, 9459 flow [2024-05-12 10:40:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:13,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:13,849 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] [2024-05-12 10:40:13,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 10:40:13,849 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:13,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 552900609, now seen corresponding path program 20 times [2024-05-12 10:40:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102019561] [2024-05-12 10:40:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:13,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:14,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102019561] [2024-05-12 10:40:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102019561] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:14,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:14,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744153130] [2024-05-12 10:40:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:14,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:14,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:14,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:14,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:14,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 544 transitions, 9459 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:14,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:14,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:14,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:15,893 INFO L124 PetriNetUnfolderBase]: 4795/7988 cut-off events. [2024-05-12 10:40:15,894 INFO L125 PetriNetUnfolderBase]: For 511877/511963 co-relation queries the response was YES. [2024-05-12 10:40:15,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55661 conditions, 7988 events. 4795/7988 cut-off events. For 511877/511963 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 56808 event pairs, 1381 based on Foata normal form. 30/7548 useless extension candidates. Maximal degree in co-relation 55491. Up to 6758 conditions per place. [2024-05-12 10:40:16,003 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 381 selfloop transitions, 192 changer transitions 0/586 dead transitions. [2024-05-12 10:40:16,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 586 transitions, 11509 flow [2024-05-12 10:40:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:40:16,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:40:16,004 INFO L175 Difference]: Start difference. First operand has 398 places, 544 transitions, 9459 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:40:16,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 586 transitions, 11509 flow [2024-05-12 10:40:19,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 586 transitions, 11172 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-05-12 10:40:19,108 INFO L231 Difference]: Finished difference. Result has 398 places, 556 transitions, 9920 flow [2024-05-12 10:40:19,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9920, PETRI_PLACES=398, PETRI_TRANSITIONS=556} [2024-05-12 10:40:19,108 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 348 predicate places. [2024-05-12 10:40:19,109 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 556 transitions, 9920 flow [2024-05-12 10:40:19,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:19,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:19,109 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] [2024-05-12 10:40:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 10:40:19,109 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:19,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1529536179, now seen corresponding path program 21 times [2024-05-12 10:40:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:19,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305187690] [2024-05-12 10:40:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:19,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305187690] [2024-05-12 10:40:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305187690] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:19,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:19,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:19,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641178369] [2024-05-12 10:40:19,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:19,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:19,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:19,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:19,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:19,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 556 transitions, 9920 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:19,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:19,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:19,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:21,003 INFO L124 PetriNetUnfolderBase]: 4792/7983 cut-off events. [2024-05-12 10:40:21,004 INFO L125 PetriNetUnfolderBase]: For 501225/501311 co-relation queries the response was YES. [2024-05-12 10:40:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55864 conditions, 7983 events. 4792/7983 cut-off events. For 501225/501311 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 56760 event pairs, 1382 based on Foata normal form. 30/7543 useless extension candidates. Maximal degree in co-relation 55694. Up to 6756 conditions per place. [2024-05-12 10:40:21,302 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 383 selfloop transitions, 185 changer transitions 0/581 dead transitions. [2024-05-12 10:40:21,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 581 transitions, 11836 flow [2024-05-12 10:40:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:40:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:40:21,304 INFO L175 Difference]: Start difference. First operand has 398 places, 556 transitions, 9920 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:40:21,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 581 transitions, 11836 flow [2024-05-12 10:40:24,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 581 transitions, 11169 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:24,582 INFO L231 Difference]: Finished difference. Result has 400 places, 556 transitions, 9629 flow [2024-05-12 10:40:24,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9253, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9629, PETRI_PLACES=400, PETRI_TRANSITIONS=556} [2024-05-12 10:40:24,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 350 predicate places. [2024-05-12 10:40:24,587 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 556 transitions, 9629 flow [2024-05-12 10:40:24,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:24,588 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] [2024-05-12 10:40:24,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 10:40:24,588 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:24,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1518574083, now seen corresponding path program 21 times [2024-05-12 10:40:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:24,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985098623] [2024-05-12 10:40:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:24,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:24,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985098623] [2024-05-12 10:40:24,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985098623] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:24,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860631619] [2024-05-12 10:40:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:24,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:24,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 556 transitions, 9629 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:24,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:24,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:26,507 INFO L124 PetriNetUnfolderBase]: 4786/7975 cut-off events. [2024-05-12 10:40:26,507 INFO L125 PetriNetUnfolderBase]: For 500425/500511 co-relation queries the response was YES. [2024-05-12 10:40:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55513 conditions, 7975 events. 4786/7975 cut-off events. For 500425/500511 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 56700 event pairs, 1381 based on Foata normal form. 22/7527 useless extension candidates. Maximal degree in co-relation 55342. Up to 6870 conditions per place. [2024-05-12 10:40:26,629 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 443 selfloop transitions, 129 changer transitions 0/585 dead transitions. [2024-05-12 10:40:26,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 585 transitions, 10847 flow [2024-05-12 10:40:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:40:26,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:40:26,630 INFO L175 Difference]: Start difference. First operand has 400 places, 556 transitions, 9629 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:40:26,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 585 transitions, 10847 flow [2024-05-12 10:40:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 585 transitions, 10354 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:29,882 INFO L231 Difference]: Finished difference. Result has 401 places, 556 transitions, 9408 flow [2024-05-12 10:40:29,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9136, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9408, PETRI_PLACES=401, PETRI_TRANSITIONS=556} [2024-05-12 10:40:29,883 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 351 predicate places. [2024-05-12 10:40:29,883 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 556 transitions, 9408 flow [2024-05-12 10:40:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:29,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:29,883 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] [2024-05-12 10:40:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 10:40:29,884 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:29,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash 556393689, now seen corresponding path program 22 times [2024-05-12 10:40:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:29,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754259003] [2024-05-12 10:40:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754259003] [2024-05-12 10:40:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754259003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:30,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:30,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481524233] [2024-05-12 10:40:30,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:30,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:30,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:30,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 556 transitions, 9408 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:30,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:31,967 INFO L124 PetriNetUnfolderBase]: 4783/7971 cut-off events. [2024-05-12 10:40:31,967 INFO L125 PetriNetUnfolderBase]: For 499040/499129 co-relation queries the response was YES. [2024-05-12 10:40:32,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55184 conditions, 7971 events. 4783/7971 cut-off events. For 499040/499129 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 56683 event pairs, 1381 based on Foata normal form. 30/7531 useless extension candidates. Maximal degree in co-relation 55012. Up to 6963 conditions per place. [2024-05-12 10:40:32,075 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 468 selfloop transitions, 104 changer transitions 0/585 dead transitions. [2024-05-12 10:40:32,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 585 transitions, 10624 flow [2024-05-12 10:40:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:40:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:40:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-05-12 10:40:32,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521739130434783 [2024-05-12 10:40:32,076 INFO L175 Difference]: Start difference. First operand has 401 places, 556 transitions, 9408 flow. Second operand 10 states and 254 transitions. [2024-05-12 10:40:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 585 transitions, 10624 flow [2024-05-12 10:40:35,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 585 transitions, 10242 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:35,517 INFO L231 Difference]: Finished difference. Result has 404 places, 556 transitions, 9240 flow [2024-05-12 10:40:35,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9240, PETRI_PLACES=404, PETRI_TRANSITIONS=556} [2024-05-12 10:40:35,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-05-12 10:40:35,518 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 556 transitions, 9240 flow [2024-05-12 10:40:35,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:35,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:35,518 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] [2024-05-12 10:40:35,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 10:40:35,519 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:35,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash 552663459, now seen corresponding path program 23 times [2024-05-12 10:40:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:35,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036464722] [2024-05-12 10:40:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:35,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036464722] [2024-05-12 10:40:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036464722] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:35,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067501692] [2024-05-12 10:40:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 556 transitions, 9240 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:37,465 INFO L124 PetriNetUnfolderBase]: 4780/7967 cut-off events. [2024-05-12 10:40:37,466 INFO L125 PetriNetUnfolderBase]: For 491332/491418 co-relation queries the response was YES. [2024-05-12 10:40:37,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54818 conditions, 7967 events. 4780/7967 cut-off events. For 491332/491418 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 56710 event pairs, 1381 based on Foata normal form. 30/7527 useless extension candidates. Maximal degree in co-relation 54646. Up to 6747 conditions per place. [2024-05-12 10:40:37,594 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 382 selfloop transitions, 193 changer transitions 0/588 dead transitions. [2024-05-12 10:40:37,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 588 transitions, 10838 flow [2024-05-12 10:40:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 10:40:37,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-05-12 10:40:37,595 INFO L175 Difference]: Start difference. First operand has 404 places, 556 transitions, 9240 flow. Second operand 8 states and 222 transitions. [2024-05-12 10:40:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 588 transitions, 10838 flow [2024-05-12 10:40:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 588 transitions, 10545 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-05-12 10:40:40,431 INFO L231 Difference]: Finished difference. Result has 402 places, 556 transitions, 9339 flow [2024-05-12 10:40:40,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9339, PETRI_PLACES=402, PETRI_TRANSITIONS=556} [2024-05-12 10:40:40,431 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 352 predicate places. [2024-05-12 10:40:40,431 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 556 transitions, 9339 flow [2024-05-12 10:40:40,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:40,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:40,432 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] [2024-05-12 10:40:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 10:40:40,432 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:40,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash 563622393, now seen corresponding path program 7 times [2024-05-12 10:40:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137693191] [2024-05-12 10:40:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:40,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137693191] [2024-05-12 10:40:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137693191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:40,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147316066] [2024-05-12 10:40:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:40,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:40,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:40,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 556 transitions, 9339 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:40,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:40,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:40,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:42,541 INFO L124 PetriNetUnfolderBase]: 4854/8086 cut-off events. [2024-05-12 10:40:42,541 INFO L125 PetriNetUnfolderBase]: For 534091/534137 co-relation queries the response was YES. [2024-05-12 10:40:42,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55975 conditions, 8086 events. 4854/8086 cut-off events. For 534091/534137 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 57719 event pairs, 1397 based on Foata normal form. 8/7617 useless extension candidates. Maximal degree in co-relation 55802. Up to 7131 conditions per place. [2024-05-12 10:40:42,645 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 534 selfloop transitions, 33 changer transitions 0/580 dead transitions. [2024-05-12 10:40:42,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 580 transitions, 10581 flow [2024-05-12 10:40:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 10:40:42,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-05-12 10:40:42,647 INFO L175 Difference]: Start difference. First operand has 402 places, 556 transitions, 9339 flow. Second operand 7 states and 181 transitions. [2024-05-12 10:40:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 580 transitions, 10581 flow [2024-05-12 10:40:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 580 transitions, 10136 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:45,823 INFO L231 Difference]: Finished difference. Result has 401 places, 557 transitions, 8989 flow [2024-05-12 10:40:45,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8894, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8989, PETRI_PLACES=401, PETRI_TRANSITIONS=557} [2024-05-12 10:40:45,824 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 351 predicate places. [2024-05-12 10:40:45,824 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 557 transitions, 8989 flow [2024-05-12 10:40:45,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:45,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:45,824 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] [2024-05-12 10:40:45,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 10:40:45,825 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:45,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash 552897633, now seen corresponding path program 8 times [2024-05-12 10:40:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370810871] [2024-05-12 10:40:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:46,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:46,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370810871] [2024-05-12 10:40:46,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370810871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:46,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:46,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:46,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615103420] [2024-05-12 10:40:46,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:46,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:46,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:46,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 557 transitions, 8989 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:46,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:46,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:47,800 INFO L124 PetriNetUnfolderBase]: 4902/8172 cut-off events. [2024-05-12 10:40:47,801 INFO L125 PetriNetUnfolderBase]: For 534233/534276 co-relation queries the response was YES. [2024-05-12 10:40:47,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55914 conditions, 8172 events. 4902/8172 cut-off events. For 534233/534276 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58510 event pairs, 1423 based on Foata normal form. 8/7700 useless extension candidates. Maximal degree in co-relation 55740. Up to 7207 conditions per place. [2024-05-12 10:40:47,923 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 539 selfloop transitions, 35 changer transitions 0/587 dead transitions. [2024-05-12 10:40:47,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 587 transitions, 10263 flow [2024-05-12 10:40:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:40:47,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 10:40:47,924 INFO L175 Difference]: Start difference. First operand has 401 places, 557 transitions, 8989 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:40:47,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 587 transitions, 10263 flow [2024-05-12 10:40:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 587 transitions, 10138 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:50,684 INFO L231 Difference]: Finished difference. Result has 402 places, 558 transitions, 8965 flow [2024-05-12 10:40:50,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8864, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8965, PETRI_PLACES=402, PETRI_TRANSITIONS=558} [2024-05-12 10:40:50,685 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 352 predicate places. [2024-05-12 10:40:50,685 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 558 transitions, 8965 flow [2024-05-12 10:40:50,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:50,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,685 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] [2024-05-12 10:40:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 10:40:50,686 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:50,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1309192431, now seen corresponding path program 9 times [2024-05-12 10:40:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237131821] [2024-05-12 10:40:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:51,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237131821] [2024-05-12 10:40:51,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237131821] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668920210] [2024-05-12 10:40:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:51,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 558 transitions, 8965 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,825 INFO L124 PetriNetUnfolderBase]: 4889/8241 cut-off events. [2024-05-12 10:40:52,826 INFO L125 PetriNetUnfolderBase]: For 505532/505575 co-relation queries the response was YES. [2024-05-12 10:40:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55192 conditions, 8241 events. 4889/8241 cut-off events. For 505532/505575 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 59447 event pairs, 1233 based on Foata normal form. 6/7768 useless extension candidates. Maximal degree in co-relation 55017. Up to 6913 conditions per place. [2024-05-12 10:40:52,939 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 541 selfloop transitions, 41 changer transitions 0/595 dead transitions. [2024-05-12 10:40:52,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 595 transitions, 10265 flow [2024-05-12 10:40:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:40:52,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:40:52,940 INFO L175 Difference]: Start difference. First operand has 402 places, 558 transitions, 8965 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:40:52,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 595 transitions, 10265 flow [2024-05-12 10:40:55,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 595 transitions, 10182 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:55,359 INFO L231 Difference]: Finished difference. Result has 404 places, 558 transitions, 8968 flow [2024-05-12 10:40:55,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8882, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8968, PETRI_PLACES=404, PETRI_TRANSITIONS=558} [2024-05-12 10:40:55,360 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-05-12 10:40:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 558 transitions, 8968 flow [2024-05-12 10:40:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:55,361 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] [2024-05-12 10:40:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 10:40:55,361 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:55,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1680816525, now seen corresponding path program 2 times [2024-05-12 10:40:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123958751] [2024-05-12 10:40:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:55,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:55,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123958751] [2024-05-12 10:40:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123958751] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:55,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990086103] [2024-05-12 10:40:55,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:55,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:55,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 558 transitions, 8968 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:55,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:55,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:57,517 INFO L124 PetriNetUnfolderBase]: 4942/8354 cut-off events. [2024-05-12 10:40:57,518 INFO L125 PetriNetUnfolderBase]: For 514207/514253 co-relation queries the response was YES. [2024-05-12 10:40:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55650 conditions, 8354 events. 4942/8354 cut-off events. For 514207/514253 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 60497 event pairs, 1241 based on Foata normal form. 6/7883 useless extension candidates. Maximal degree in co-relation 55474. Up to 7151 conditions per place. [2024-05-12 10:40:57,663 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 547 selfloop transitions, 31 changer transitions 0/591 dead transitions. [2024-05-12 10:40:57,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 591 transitions, 10293 flow [2024-05-12 10:40:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:40:57,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 10:40:57,665 INFO L175 Difference]: Start difference. First operand has 404 places, 558 transitions, 8968 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:40:57,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 591 transitions, 10293 flow [2024-05-12 10:41:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 591 transitions, 10124 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:00,009 INFO L231 Difference]: Finished difference. Result has 404 places, 561 transitions, 8928 flow [2024-05-12 10:41:00,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8799, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8928, PETRI_PLACES=404, PETRI_TRANSITIONS=561} [2024-05-12 10:41:00,010 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-05-12 10:41:00,010 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 561 transitions, 8928 flow [2024-05-12 10:41:00,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:00,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:00,010 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] [2024-05-12 10:41:00,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 10:41:00,010 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:00,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1472276439, now seen corresponding path program 3 times [2024-05-12 10:41:00,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779393482] [2024-05-12 10:41:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779393482] [2024-05-12 10:41:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779393482] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:00,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835104961] [2024-05-12 10:41:00,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:00,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:00,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:00,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 561 transitions, 8928 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:00,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:00,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:00,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:02,196 INFO L124 PetriNetUnfolderBase]: 4995/8447 cut-off events. [2024-05-12 10:41:02,196 INFO L125 PetriNetUnfolderBase]: For 522026/522072 co-relation queries the response was YES. [2024-05-12 10:41:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55857 conditions, 8447 events. 4995/8447 cut-off events. For 522026/522072 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61417 event pairs, 1259 based on Foata normal form. 6/7973 useless extension candidates. Maximal degree in co-relation 55680. Up to 7136 conditions per place. [2024-05-12 10:41:02,308 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 552 selfloop transitions, 35 changer transitions 0/600 dead transitions. [2024-05-12 10:41:02,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 600 transitions, 10311 flow [2024-05-12 10:41:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 10:41:02,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-05-12 10:41:02,309 INFO L175 Difference]: Start difference. First operand has 404 places, 561 transitions, 8928 flow. Second operand 7 states and 192 transitions. [2024-05-12 10:41:02,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 600 transitions, 10311 flow [2024-05-12 10:41:06,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 600 transitions, 10267 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:06,431 INFO L231 Difference]: Finished difference. Result has 411 places, 566 transitions, 9057 flow [2024-05-12 10:41:06,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8884, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9057, PETRI_PLACES=411, PETRI_TRANSITIONS=566} [2024-05-12 10:41:06,432 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 361 predicate places. [2024-05-12 10:41:06,432 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 566 transitions, 9057 flow [2024-05-12 10:41:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:06,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:06,432 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] [2024-05-12 10:41:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 10:41:06,432 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:06,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1320643335, now seen corresponding path program 4 times [2024-05-12 10:41:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:06,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285078873] [2024-05-12 10:41:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285078873] [2024-05-12 10:41:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285078873] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:06,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844533546] [2024-05-12 10:41:06,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:06,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:06,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:06,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 566 transitions, 9057 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:06,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:06,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:06,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:08,446 INFO L124 PetriNetUnfolderBase]: 4982/8340 cut-off events. [2024-05-12 10:41:08,446 INFO L125 PetriNetUnfolderBase]: For 503660/503703 co-relation queries the response was YES. [2024-05-12 10:41:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55549 conditions, 8340 events. 4982/8340 cut-off events. For 503660/503703 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 60071 event pairs, 1444 based on Foata normal form. 6/7866 useless extension candidates. Maximal degree in co-relation 55368. Up to 7178 conditions per place. [2024-05-12 10:41:08,573 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 547 selfloop transitions, 36 changer transitions 0/596 dead transitions. [2024-05-12 10:41:08,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 596 transitions, 10369 flow [2024-05-12 10:41:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 10:41:08,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2024-05-12 10:41:08,575 INFO L175 Difference]: Start difference. First operand has 411 places, 566 transitions, 9057 flow. Second operand 7 states and 185 transitions. [2024-05-12 10:41:08,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 596 transitions, 10369 flow [2024-05-12 10:41:11,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 596 transitions, 10301 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:11,009 INFO L231 Difference]: Finished difference. Result has 417 places, 568 transitions, 9106 flow [2024-05-12 10:41:11,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9106, PETRI_PLACES=417, PETRI_TRANSITIONS=568} [2024-05-12 10:41:11,010 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 367 predicate places. [2024-05-12 10:41:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 568 transitions, 9106 flow [2024-05-12 10:41:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:11,010 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] [2024-05-12 10:41:11,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 10:41:11,010 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2111303395, now seen corresponding path program 1 times [2024-05-12 10:41:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750038042] [2024-05-12 10:41:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:11,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:11,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750038042] [2024-05-12 10:41:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750038042] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:11,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426689271] [2024-05-12 10:41:11,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:11,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 568 transitions, 9106 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:11,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:11,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:13,174 INFO L124 PetriNetUnfolderBase]: 5180/8766 cut-off events. [2024-05-12 10:41:13,174 INFO L125 PetriNetUnfolderBase]: For 589724/590062 co-relation queries the response was YES. [2024-05-12 10:41:13,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58477 conditions, 8766 events. 5180/8766 cut-off events. For 589724/590062 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 64363 event pairs, 1414 based on Foata normal form. 143/8455 useless extension candidates. Maximal degree in co-relation 58293. Up to 6727 conditions per place. [2024-05-12 10:41:13,305 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 438 selfloop transitions, 152 changer transitions 0/603 dead transitions. [2024-05-12 10:41:13,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 603 transitions, 10662 flow [2024-05-12 10:41:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:41:13,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 10:41:13,306 INFO L175 Difference]: Start difference. First operand has 417 places, 568 transitions, 9106 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:41:13,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 603 transitions, 10662 flow [2024-05-12 10:41:17,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 603 transitions, 10509 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:17,719 INFO L231 Difference]: Finished difference. Result has 418 places, 571 transitions, 9322 flow [2024-05-12 10:41:17,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8953, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9322, PETRI_PLACES=418, PETRI_TRANSITIONS=571} [2024-05-12 10:41:17,719 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 368 predicate places. [2024-05-12 10:41:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 571 transitions, 9322 flow [2024-05-12 10:41:17,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:17,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:17,720 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] [2024-05-12 10:41:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-05-12 10:41:17,720 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:17,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2042430207, now seen corresponding path program 2 times [2024-05-12 10:41:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511999386] [2024-05-12 10:41:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:18,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511999386] [2024-05-12 10:41:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511999386] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:18,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204212110] [2024-05-12 10:41:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:18,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:18,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:18,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:18,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 571 transitions, 9322 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:18,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:20,096 INFO L124 PetriNetUnfolderBase]: 5328/8944 cut-off events. [2024-05-12 10:41:20,096 INFO L125 PetriNetUnfolderBase]: For 627156/627499 co-relation queries the response was YES. [2024-05-12 10:41:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59965 conditions, 8944 events. 5328/8944 cut-off events. For 627156/627499 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 65687 event pairs, 1660 based on Foata normal form. 152/8620 useless extension candidates. Maximal degree in co-relation 59782. Up to 7589 conditions per place. [2024-05-12 10:41:20,213 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 440 selfloop transitions, 140 changer transitions 0/593 dead transitions. [2024-05-12 10:41:20,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 593 transitions, 10596 flow [2024-05-12 10:41:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 10:41:20,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-05-12 10:41:20,214 INFO L175 Difference]: Start difference. First operand has 418 places, 571 transitions, 9322 flow. Second operand 7 states and 183 transitions. [2024-05-12 10:41:20,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 593 transitions, 10596 flow [2024-05-12 10:41:23,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 593 transitions, 10313 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:23,808 INFO L231 Difference]: Finished difference. Result has 421 places, 573 transitions, 9369 flow [2024-05-12 10:41:23,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9041, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9369, PETRI_PLACES=421, PETRI_TRANSITIONS=573} [2024-05-12 10:41:23,809 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 371 predicate places. [2024-05-12 10:41:23,809 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 573 transitions, 9369 flow [2024-05-12 10:41:23,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:23,809 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] [2024-05-12 10:41:23,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-05-12 10:41:23,809 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:23,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2129269887, now seen corresponding path program 3 times [2024-05-12 10:41:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:23,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949848996] [2024-05-12 10:41:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:24,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:24,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949848996] [2024-05-12 10:41:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949848996] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:24,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:24,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414622513] [2024-05-12 10:41:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:24,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:24,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:24,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 573 transitions, 9369 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:24,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:24,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:26,143 INFO L124 PetriNetUnfolderBase]: 5434/9144 cut-off events. [2024-05-12 10:41:26,143 INFO L125 PetriNetUnfolderBase]: For 619814/620158 co-relation queries the response was YES. [2024-05-12 10:41:26,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61007 conditions, 9144 events. 5434/9144 cut-off events. For 619814/620158 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 67455 event pairs, 1662 based on Foata normal form. 143/8802 useless extension candidates. Maximal degree in co-relation 60823. Up to 7601 conditions per place. [2024-05-12 10:41:26,296 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 443 selfloop transitions, 144 changer transitions 0/600 dead transitions. [2024-05-12 10:41:26,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 600 transitions, 10685 flow [2024-05-12 10:41:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:41:26,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:41:26,297 INFO L175 Difference]: Start difference. First operand has 421 places, 573 transitions, 9369 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:41:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 600 transitions, 10685 flow [2024-05-12 10:41:30,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 600 transitions, 10387 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:30,379 INFO L231 Difference]: Finished difference. Result has 423 places, 575 transitions, 9410 flow [2024-05-12 10:41:30,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9410, PETRI_PLACES=423, PETRI_TRANSITIONS=575} [2024-05-12 10:41:30,380 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-05-12 10:41:30,380 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 575 transitions, 9410 flow [2024-05-12 10:41:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:30,380 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] [2024-05-12 10:41:30,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-05-12 10:41:30,380 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:30,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash -342544895, now seen corresponding path program 4 times [2024-05-12 10:41:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:30,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234502935] [2024-05-12 10:41:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:30,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:30,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234502935] [2024-05-12 10:41:30,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234502935] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:30,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:30,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122396014] [2024-05-12 10:41:30,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:30,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:30,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:30,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 575 transitions, 9410 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:30,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:30,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:32,669 INFO L124 PetriNetUnfolderBase]: 5556/9305 cut-off events. [2024-05-12 10:41:32,670 INFO L125 PetriNetUnfolderBase]: For 638916/639014 co-relation queries the response was YES. [2024-05-12 10:41:32,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62002 conditions, 9305 events. 5556/9305 cut-off events. For 638916/639014 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 68604 event pairs, 1701 based on Foata normal form. 45/8831 useless extension candidates. Maximal degree in co-relation 61817. Up to 8025 conditions per place. [2024-05-12 10:41:32,821 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 505 selfloop transitions, 85 changer transitions 0/603 dead transitions. [2024-05-12 10:41:32,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 603 transitions, 10726 flow [2024-05-12 10:41:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:41:32,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:41:32,822 INFO L175 Difference]: Start difference. First operand has 423 places, 575 transitions, 9410 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:41:32,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 603 transitions, 10726 flow [2024-05-12 10:41:36,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 603 transitions, 10411 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:36,841 INFO L231 Difference]: Finished difference. Result has 425 places, 577 transitions, 9323 flow [2024-05-12 10:41:36,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9323, PETRI_PLACES=425, PETRI_TRANSITIONS=577} [2024-05-12 10:41:36,841 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 375 predicate places. [2024-05-12 10:41:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 577 transitions, 9323 flow [2024-05-12 10:41:36,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:36,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:36,842 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] [2024-05-12 10:41:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-05-12 10:41:36,842 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:36,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:36,856 INFO L85 PathProgramCache]: Analyzing trace with hash -342692765, now seen corresponding path program 5 times [2024-05-12 10:41:36,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:36,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181944378] [2024-05-12 10:41:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:36,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:37,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:37,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181944378] [2024-05-12 10:41:37,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181944378] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:37,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:37,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620674483] [2024-05-12 10:41:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:37,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:37,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:37,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:37,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 577 transitions, 9323 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:37,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:37,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:37,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:39,272 INFO L124 PetriNetUnfolderBase]: 5688/9665 cut-off events. [2024-05-12 10:41:39,272 INFO L125 PetriNetUnfolderBase]: For 643724/643825 co-relation queries the response was YES. [2024-05-12 10:41:39,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63613 conditions, 9665 events. 5688/9665 cut-off events. For 643724/643825 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 72471 event pairs, 1533 based on Foata normal form. 41/9195 useless extension candidates. Maximal degree in co-relation 63427. Up to 7744 conditions per place. [2024-05-12 10:41:39,412 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 507 selfloop transitions, 94 changer transitions 0/614 dead transitions. [2024-05-12 10:41:39,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 614 transitions, 10917 flow [2024-05-12 10:41:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:41:39,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:41:39,413 INFO L175 Difference]: Start difference. First operand has 425 places, 577 transitions, 9323 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:41:39,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 614 transitions, 10917 flow [2024-05-12 10:41:43,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 614 transitions, 10723 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:43,376 INFO L231 Difference]: Finished difference. Result has 427 places, 579 transitions, 9384 flow [2024-05-12 10:41:43,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9129, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9384, PETRI_PLACES=427, PETRI_TRANSITIONS=579} [2024-05-12 10:41:43,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 377 predicate places. [2024-05-12 10:41:43,377 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 579 transitions, 9384 flow [2024-05-12 10:41:43,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:43,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:43,377 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] [2024-05-12 10:41:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-05-12 10:41:43,377 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:43,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -336967313, now seen corresponding path program 1 times [2024-05-12 10:41:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:43,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622526042] [2024-05-12 10:41:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:43,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622526042] [2024-05-12 10:41:43,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622526042] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:43,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:43,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:43,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662486816] [2024-05-12 10:41:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:43,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:43,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:43,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 579 transitions, 9384 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:43,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:43,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:43,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:45,813 INFO L124 PetriNetUnfolderBase]: 5655/9682 cut-off events. [2024-05-12 10:41:45,813 INFO L125 PetriNetUnfolderBase]: For 588953/589060 co-relation queries the response was YES. [2024-05-12 10:41:45,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62037 conditions, 9682 events. 5655/9682 cut-off events. For 588953/589060 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 72873 event pairs, 1452 based on Foata normal form. 32/9205 useless extension candidates. Maximal degree in co-relation 61850. Up to 7536 conditions per place. [2024-05-12 10:41:45,950 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 525 selfloop transitions, 71 changer transitions 0/609 dead transitions. [2024-05-12 10:41:45,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 609 transitions, 10690 flow [2024-05-12 10:41:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:41:45,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:41:45,951 INFO L175 Difference]: Start difference. First operand has 427 places, 579 transitions, 9384 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:41:45,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 609 transitions, 10690 flow [2024-05-12 10:41:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 609 transitions, 10511 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:48,764 INFO L231 Difference]: Finished difference. Result has 429 places, 579 transitions, 9354 flow [2024-05-12 10:41:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9354, PETRI_PLACES=429, PETRI_TRANSITIONS=579} [2024-05-12 10:41:48,765 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 379 predicate places. [2024-05-12 10:41:48,765 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 579 transitions, 9354 flow [2024-05-12 10:41:48,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:48,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:48,765 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] [2024-05-12 10:41:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-05-12 10:41:48,765 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1385291202, now seen corresponding path program 1 times [2024-05-12 10:41:48,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79305712] [2024-05-12 10:41:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79305712] [2024-05-12 10:41:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79305712] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:49,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905514375] [2024-05-12 10:41:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:49,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:49,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 579 transitions, 9354 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:49,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:49,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:51,373 INFO L124 PetriNetUnfolderBase]: 5794/9774 cut-off events. [2024-05-12 10:41:51,373 INFO L125 PetriNetUnfolderBase]: For 601292/601513 co-relation queries the response was YES. [2024-05-12 10:41:51,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64128 conditions, 9774 events. 5794/9774 cut-off events. For 601292/601513 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 72985 event pairs, 1504 based on Foata normal form. 93/9387 useless extension candidates. Maximal degree in co-relation 63940. Up to 7705 conditions per place. [2024-05-12 10:41:51,513 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 419 selfloop transitions, 197 changer transitions 0/629 dead transitions. [2024-05-12 10:41:51,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 629 transitions, 11300 flow [2024-05-12 10:41:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-05-12 10:41:51,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:41:51,514 INFO L175 Difference]: Start difference. First operand has 429 places, 579 transitions, 9354 flow. Second operand 8 states and 228 transitions. [2024-05-12 10:41:51,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 629 transitions, 11300 flow [2024-05-12 10:41:56,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 629 transitions, 11111 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:56,194 INFO L231 Difference]: Finished difference. Result has 432 places, 585 transitions, 9718 flow [2024-05-12 10:41:56,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9718, PETRI_PLACES=432, PETRI_TRANSITIONS=585} [2024-05-12 10:41:56,195 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 382 predicate places. [2024-05-12 10:41:56,195 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 585 transitions, 9718 flow [2024-05-12 10:41:56,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:56,196 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] [2024-05-12 10:41:56,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-05-12 10:41:56,196 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:56,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1826033810, now seen corresponding path program 2 times [2024-05-12 10:41:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:56,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400826536] [2024-05-12 10:41:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:56,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:56,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400826536] [2024-05-12 10:41:56,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400826536] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:56,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:56,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467705140] [2024-05-12 10:41:56,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:56,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:56,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 585 transitions, 9718 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:56,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:56,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:58,930 INFO L124 PetriNetUnfolderBase]: 5933/10006 cut-off events. [2024-05-12 10:41:58,931 INFO L125 PetriNetUnfolderBase]: For 672112/672331 co-relation queries the response was YES. [2024-05-12 10:41:59,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66923 conditions, 10006 events. 5933/10006 cut-off events. For 672112/672331 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 75205 event pairs, 1452 based on Foata normal form. 89/9609 useless extension candidates. Maximal degree in co-relation 66734. Up to 7797 conditions per place. [2024-05-12 10:41:59,098 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 419 selfloop transitions, 201 changer transitions 0/633 dead transitions. [2024-05-12 10:41:59,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 633 transitions, 11660 flow [2024-05-12 10:41:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-05-12 10:41:59,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:41:59,100 INFO L175 Difference]: Start difference. First operand has 432 places, 585 transitions, 9718 flow. Second operand 8 states and 228 transitions. [2024-05-12 10:41:59,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 633 transitions, 11660 flow [2024-05-12 10:42:04,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 633 transitions, 11342 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:04,025 INFO L231 Difference]: Finished difference. Result has 437 places, 589 transitions, 9915 flow [2024-05-12 10:42:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9428, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9915, PETRI_PLACES=437, PETRI_TRANSITIONS=589} [2024-05-12 10:42:04,026 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 387 predicate places. [2024-05-12 10:42:04,026 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 589 transitions, 9915 flow [2024-05-12 10:42:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:04,026 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] [2024-05-12 10:42:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-05-12 10:42:04,026 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:04,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash -164137534, now seen corresponding path program 3 times [2024-05-12 10:42:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144551613] [2024-05-12 10:42:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:04,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:04,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144551613] [2024-05-12 10:42:04,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144551613] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:04,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:04,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:04,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215058529] [2024-05-12 10:42:04,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:04,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:04,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:04,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 589 transitions, 9915 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:06,472 INFO L124 PetriNetUnfolderBase]: 5980/10026 cut-off events. [2024-05-12 10:42:06,472 INFO L125 PetriNetUnfolderBase]: For 693687/693906 co-relation queries the response was YES. [2024-05-12 10:42:06,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68018 conditions, 10026 events. 5980/10026 cut-off events. For 693687/693906 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 75274 event pairs, 1904 based on Foata normal form. 89/9606 useless extension candidates. Maximal degree in co-relation 67827. Up to 8573 conditions per place. [2024-05-12 10:42:06,679 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 430 selfloop transitions, 187 changer transitions 0/630 dead transitions. [2024-05-12 10:42:06,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 630 transitions, 11565 flow [2024-05-12 10:42:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:42:06,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 10:42:06,680 INFO L175 Difference]: Start difference. First operand has 437 places, 589 transitions, 9915 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:42:06,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 630 transitions, 11565 flow [2024-05-12 10:42:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 630 transitions, 11185 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:12,055 INFO L231 Difference]: Finished difference. Result has 442 places, 593 transitions, 10035 flow [2024-05-12 10:42:12,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9541, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10035, PETRI_PLACES=442, PETRI_TRANSITIONS=593} [2024-05-12 10:42:12,055 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 392 predicate places. [2024-05-12 10:42:12,055 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 593 transitions, 10035 flow [2024-05-12 10:42:12,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:12,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:12,056 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, 1] [2024-05-12 10:42:12,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-05-12 10:42:12,056 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:12,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -155566654, now seen corresponding path program 4 times [2024-05-12 10:42:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:12,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907181570] [2024-05-12 10:42:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907181570] [2024-05-12 10:42:12,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907181570] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:12,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:12,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:12,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615146753] [2024-05-12 10:42:12,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:12,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:12,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:12,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:12,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 593 transitions, 10035 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:14,554 INFO L124 PetriNetUnfolderBase]: 6001/10040 cut-off events. [2024-05-12 10:42:14,555 INFO L125 PetriNetUnfolderBase]: For 707165/707388 co-relation queries the response was YES. [2024-05-12 10:42:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68333 conditions, 10040 events. 6001/10040 cut-off events. For 707165/707388 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 75215 event pairs, 1925 based on Foata normal form. 93/9625 useless extension candidates. Maximal degree in co-relation 68140. Up to 8663 conditions per place. [2024-05-12 10:42:14,720 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 428 selfloop transitions, 184 changer transitions 0/625 dead transitions. [2024-05-12 10:42:14,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 625 transitions, 11393 flow [2024-05-12 10:42:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:42:14,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:42:14,721 INFO L175 Difference]: Start difference. First operand has 442 places, 593 transitions, 10035 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:42:14,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 625 transitions, 11393 flow [2024-05-12 10:42:20,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 625 transitions, 10959 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:20,287 INFO L231 Difference]: Finished difference. Result has 445 places, 595 transitions, 10034 flow [2024-05-12 10:42:20,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9619, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10034, PETRI_PLACES=445, PETRI_TRANSITIONS=595} [2024-05-12 10:42:20,288 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 395 predicate places. [2024-05-12 10:42:20,288 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 595 transitions, 10034 flow [2024-05-12 10:42:20,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:20,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:20,288 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] [2024-05-12 10:42:20,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-05-12 10:42:20,289 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:20,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:20,289 INFO L85 PathProgramCache]: Analyzing trace with hash -11794234, now seen corresponding path program 5 times [2024-05-12 10:42:20,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:20,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455590386] [2024-05-12 10:42:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:20,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:20,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:20,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455590386] [2024-05-12 10:42:20,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455590386] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:20,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:20,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257397628] [2024-05-12 10:42:20,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:20,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:20,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:20,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:20,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 595 transitions, 10034 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:22,914 INFO L124 PetriNetUnfolderBase]: 6166/10332 cut-off events. [2024-05-12 10:42:22,915 INFO L125 PetriNetUnfolderBase]: For 792906/793128 co-relation queries the response was YES. [2024-05-12 10:42:23,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71100 conditions, 10332 events. 6166/10332 cut-off events. For 792906/793128 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77793 event pairs, 1954 based on Foata normal form. 89/9901 useless extension candidates. Maximal degree in co-relation 70906. Up to 8740 conditions per place. [2024-05-12 10:42:23,071 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 431 selfloop transitions, 191 changer transitions 0/635 dead transitions. [2024-05-12 10:42:23,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 635 transitions, 11742 flow [2024-05-12 10:42:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 10:42:23,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 10:42:23,072 INFO L175 Difference]: Start difference. First operand has 445 places, 595 transitions, 10034 flow. Second operand 8 states and 219 transitions. [2024-05-12 10:42:23,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 635 transitions, 11742 flow [2024-05-12 10:42:29,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 635 transitions, 11353 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:29,501 INFO L231 Difference]: Finished difference. Result has 448 places, 601 transitions, 10188 flow [2024-05-12 10:42:29,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9645, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10188, PETRI_PLACES=448, PETRI_TRANSITIONS=601} [2024-05-12 10:42:29,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 398 predicate places. [2024-05-12 10:42:29,502 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 601 transitions, 10188 flow [2024-05-12 10:42:29,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:29,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:29,502 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] [2024-05-12 10:42:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-05-12 10:42:29,503 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:29,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1040543170, now seen corresponding path program 6 times [2024-05-12 10:42:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:29,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872176180] [2024-05-12 10:42:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:29,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:29,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872176180] [2024-05-12 10:42:29,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872176180] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:29,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:29,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:29,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739375967] [2024-05-12 10:42:29,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:29,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:29,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:29,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 601 transitions, 10188 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:29,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:29,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:29,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:32,233 INFO L124 PetriNetUnfolderBase]: 6161/10300 cut-off events. [2024-05-12 10:42:32,233 INFO L125 PetriNetUnfolderBase]: For 794415/794641 co-relation queries the response was YES. [2024-05-12 10:42:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71204 conditions, 10300 events. 6161/10300 cut-off events. For 794415/794641 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77372 event pairs, 1969 based on Foata normal form. 93/9873 useless extension candidates. Maximal degree in co-relation 71008. Up to 8903 conditions per place. [2024-05-12 10:42:32,385 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 431 selfloop transitions, 184 changer transitions 0/628 dead transitions. [2024-05-12 10:42:32,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 628 transitions, 11488 flow [2024-05-12 10:42:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:42:32,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:42:32,387 INFO L175 Difference]: Start difference. First operand has 448 places, 601 transitions, 10188 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:42:32,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 628 transitions, 11488 flow [2024-05-12 10:42:38,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 628 transitions, 11095 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:38,191 INFO L231 Difference]: Finished difference. Result has 451 places, 601 transitions, 10168 flow [2024-05-12 10:42:38,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9795, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10168, PETRI_PLACES=451, PETRI_TRANSITIONS=601} [2024-05-12 10:42:38,191 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 401 predicate places. [2024-05-12 10:42:38,194 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 601 transitions, 10168 flow [2024-05-12 10:42:38,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:38,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:38,194 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, 1] [2024-05-12 10:42:38,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-05-12 10:42:38,194 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:38,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1111384727, now seen corresponding path program 1 times [2024-05-12 10:42:38,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242142233] [2024-05-12 10:42:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:38,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:38,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242142233] [2024-05-12 10:42:38,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242142233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:38,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:38,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:38,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255948152] [2024-05-12 10:42:38,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:38,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:38,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:38,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:38,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 601 transitions, 10168 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:38,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:38,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:40,626 INFO L124 PetriNetUnfolderBase]: 6169/10314 cut-off events. [2024-05-12 10:42:40,627 INFO L125 PetriNetUnfolderBase]: For 801072/801436 co-relation queries the response was YES. [2024-05-12 10:42:40,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71218 conditions, 10314 events. 6169/10314 cut-off events. For 801072/801436 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77428 event pairs, 1994 based on Foata normal form. 84/9847 useless extension candidates. Maximal degree in co-relation 71021. Up to 8550 conditions per place. [2024-05-12 10:42:40,793 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 297 selfloop transitions, 320 changer transitions 0/630 dead transitions. [2024-05-12 10:42:40,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 630 transitions, 11987 flow [2024-05-12 10:42:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:42:40,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:42:40,795 INFO L175 Difference]: Start difference. First operand has 451 places, 601 transitions, 10168 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:42:40,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 630 transitions, 11987 flow [2024-05-12 10:42:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 630 transitions, 11596 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:47,704 INFO L231 Difference]: Finished difference. Result has 453 places, 604 transitions, 10500 flow [2024-05-12 10:42:47,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9777, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10500, PETRI_PLACES=453, PETRI_TRANSITIONS=604} [2024-05-12 10:42:47,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 403 predicate places. [2024-05-12 10:42:47,704 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 604 transitions, 10500 flow [2024-05-12 10:42:47,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:47,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:47,705 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] [2024-05-12 10:42:47,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-05-12 10:42:47,705 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:47,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -301079713, now seen corresponding path program 2 times [2024-05-12 10:42:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:47,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305280962] [2024-05-12 10:42:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:47,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305280962] [2024-05-12 10:42:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305280962] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:48,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:48,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330056016] [2024-05-12 10:42:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:48,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 604 transitions, 10500 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:48,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:50,314 INFO L124 PetriNetUnfolderBase]: 6177/10328 cut-off events. [2024-05-12 10:42:50,314 INFO L125 PetriNetUnfolderBase]: For 814082/814276 co-relation queries the response was YES. [2024-05-12 10:42:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71851 conditions, 10328 events. 6177/10328 cut-off events. For 814082/814276 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77695 event pairs, 1998 based on Foata normal form. 31/9843 useless extension candidates. Maximal degree in co-relation 71653. Up to 8559 conditions per place. [2024-05-12 10:42:50,480 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 356 changer transitions 0/637 dead transitions. [2024-05-12 10:42:50,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 637 transitions, 12353 flow [2024-05-12 10:42:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 10:42:50,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748792270531401 [2024-05-12 10:42:50,481 INFO L175 Difference]: Start difference. First operand has 453 places, 604 transitions, 10500 flow. Second operand 9 states and 238 transitions. [2024-05-12 10:42:50,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 637 transitions, 12353 flow [2024-05-12 10:42:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 637 transitions, 11324 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:56,970 INFO L231 Difference]: Finished difference. Result has 455 places, 607 transitions, 10272 flow [2024-05-12 10:42:56,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9503, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10272, PETRI_PLACES=455, PETRI_TRANSITIONS=607} [2024-05-12 10:42:56,971 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 405 predicate places. [2024-05-12 10:42:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 607 transitions, 10272 flow [2024-05-12 10:42:56,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:56,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,971 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] [2024-05-12 10:42:56,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-05-12 10:42:56,971 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:56,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 398583621, now seen corresponding path program 3 times [2024-05-12 10:42:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719573651] [2024-05-12 10:42:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:57,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719573651] [2024-05-12 10:42:57,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719573651] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:57,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:57,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401512388] [2024-05-12 10:42:57,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:57,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:57,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:57,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:57,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 607 transitions, 10272 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:57,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:57,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:57,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:59,576 INFO L124 PetriNetUnfolderBase]: 6185/10340 cut-off events. [2024-05-12 10:42:59,577 INFO L125 PetriNetUnfolderBase]: For 821889/822075 co-relation queries the response was YES. [2024-05-12 10:42:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71636 conditions, 10340 events. 6185/10340 cut-off events. For 821889/822075 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77734 event pairs, 1997 based on Foata normal form. 31/9849 useless extension candidates. Maximal degree in co-relation 71439. Up to 8568 conditions per place. [2024-05-12 10:42:59,737 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 359 changer transitions 0/640 dead transitions. [2024-05-12 10:42:59,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 640 transitions, 12109 flow [2024-05-12 10:42:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 10:42:59,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:42:59,739 INFO L175 Difference]: Start difference. First operand has 455 places, 607 transitions, 10272 flow. Second operand 9 states and 240 transitions. [2024-05-12 10:42:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 640 transitions, 12109 flow [2024-05-12 10:43:06,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 640 transitions, 11557 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:06,631 INFO L231 Difference]: Finished difference. Result has 458 places, 610 transitions, 10501 flow [2024-05-12 10:43:06,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9723, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10501, PETRI_PLACES=458, PETRI_TRANSITIONS=610} [2024-05-12 10:43:06,631 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 408 predicate places. [2024-05-12 10:43:06,631 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 610 transitions, 10501 flow [2024-05-12 10:43:06,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:06,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:06,632 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] [2024-05-12 10:43:06,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-05-12 10:43:06,632 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:06,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1176504529, now seen corresponding path program 4 times [2024-05-12 10:43:06,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026667080] [2024-05-12 10:43:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026667080] [2024-05-12 10:43:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026667080] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:06,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:06,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:43:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144576184] [2024-05-12 10:43:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:43:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:43:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:43:07,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:07,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 610 transitions, 10501 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:07,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:07,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:07,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:09,413 INFO L124 PetriNetUnfolderBase]: 6193/10354 cut-off events. [2024-05-12 10:43:09,413 INFO L125 PetriNetUnfolderBase]: For 838723/838913 co-relation queries the response was YES. [2024-05-12 10:43:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71947 conditions, 10354 events. 6193/10354 cut-off events. For 838723/838913 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 77850 event pairs, 2000 based on Foata normal form. 31/9867 useless extension candidates. Maximal degree in co-relation 71748. Up to 8577 conditions per place. [2024-05-12 10:43:09,599 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 270 selfloop transitions, 357 changer transitions 0/640 dead transitions. [2024-05-12 10:43:09,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 640 transitions, 12337 flow [2024-05-12 10:43:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:43:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:43:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 10:43:09,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-05-12 10:43:09,600 INFO L175 Difference]: Start difference. First operand has 458 places, 610 transitions, 10501 flow. Second operand 9 states and 237 transitions. [2024-05-12 10:43:09,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 640 transitions, 12337 flow [2024-05-12 10:43:16,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 640 transitions, 11581 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:16,860 INFO L231 Difference]: Finished difference. Result has 460 places, 613 transitions, 10525 flow [2024-05-12 10:43:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9751, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10525, PETRI_PLACES=460, PETRI_TRANSITIONS=613} [2024-05-12 10:43:16,861 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 410 predicate places. [2024-05-12 10:43:16,861 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 613 transitions, 10525 flow [2024-05-12 10:43:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:16,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:16,861 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] [2024-05-12 10:43:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-05-12 10:43:16,862 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -948603379, now seen corresponding path program 5 times [2024-05-12 10:43:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132082260] [2024-05-12 10:43:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:16,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132082260] [2024-05-12 10:43:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132082260] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:17,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:17,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:43:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331904368] [2024-05-12 10:43:17,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:43:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:43:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:43:17,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:17,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 613 transitions, 10525 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:17,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:17,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:17,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:19,797 INFO L124 PetriNetUnfolderBase]: 6212/10380 cut-off events. [2024-05-12 10:43:19,798 INFO L125 PetriNetUnfolderBase]: For 858541/858739 co-relation queries the response was YES. [2024-05-12 10:43:19,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72376 conditions, 10380 events. 6212/10380 cut-off events. For 858541/858739 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 78074 event pairs, 1999 based on Foata normal form. 31/9885 useless extension candidates. Maximal degree in co-relation 72176. Up to 8598 conditions per place. [2024-05-12 10:43:19,959 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 269 selfloop transitions, 366 changer transitions 0/648 dead transitions. [2024-05-12 10:43:19,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 648 transitions, 12681 flow [2024-05-12 10:43:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 10:43:19,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608695652173913 [2024-05-12 10:43:19,960 INFO L175 Difference]: Start difference. First operand has 460 places, 613 transitions, 10525 flow. Second operand 10 states and 258 transitions. [2024-05-12 10:43:19,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 648 transitions, 12681 flow [2024-05-12 10:43:26,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 648 transitions, 12130 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:26,578 INFO L231 Difference]: Finished difference. Result has 464 places, 619 transitions, 10838 flow [2024-05-12 10:43:26,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10838, PETRI_PLACES=464, PETRI_TRANSITIONS=619} [2024-05-12 10:43:26,578 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 414 predicate places. [2024-05-12 10:43:26,578 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 619 transitions, 10838 flow [2024-05-12 10:43:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:26,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:26,579 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] [2024-05-12 10:43:26,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-05-12 10:43:26,579 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:26,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1176717499, now seen corresponding path program 6 times [2024-05-12 10:43:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397870548] [2024-05-12 10:43:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:26,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397870548] [2024-05-12 10:43:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397870548] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:26,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:26,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:43:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855250527] [2024-05-12 10:43:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:26,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:43:26,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:43:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:43:26,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:26,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 619 transitions, 10838 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:26,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:26,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:26,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:29,150 INFO L124 PetriNetUnfolderBase]: 6231/10405 cut-off events. [2024-05-12 10:43:29,150 INFO L125 PetriNetUnfolderBase]: For 882819/883005 co-relation queries the response was YES. [2024-05-12 10:43:29,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72952 conditions, 10405 events. 6231/10405 cut-off events. For 882819/883005 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 78161 event pairs, 1994 based on Foata normal form. 31/9893 useless extension candidates. Maximal degree in co-relation 72750. Up to 8619 conditions per place. [2024-05-12 10:43:29,356 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 272 selfloop transitions, 369 changer transitions 0/654 dead transitions. [2024-05-12 10:43:29,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 654 transitions, 13018 flow [2024-05-12 10:43:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-05-12 10:43:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:43:29,357 INFO L175 Difference]: Start difference. First operand has 464 places, 619 transitions, 10838 flow. Second operand 10 states and 260 transitions. [2024-05-12 10:43:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 654 transitions, 13018 flow [2024-05-12 10:43:36,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 654 transitions, 12224 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:36,012 INFO L231 Difference]: Finished difference. Result has 467 places, 625 transitions, 10920 flow [2024-05-12 10:43:36,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10056, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10920, PETRI_PLACES=467, PETRI_TRANSITIONS=625} [2024-05-12 10:43:36,012 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 417 predicate places. [2024-05-12 10:43:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 625 transitions, 10920 flow [2024-05-12 10:43:36,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:36,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:36,013 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] [2024-05-12 10:43:36,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-05-12 10:43:36,013 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:36,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1038472860, now seen corresponding path program 7 times [2024-05-12 10:43:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:36,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440794180] [2024-05-12 10:43:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:36,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:36,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440794180] [2024-05-12 10:43:36,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440794180] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:36,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:36,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821928244] [2024-05-12 10:43:36,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:36,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:36,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:36,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 625 transitions, 10920 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:36,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:38,642 INFO L124 PetriNetUnfolderBase]: 6304/10528 cut-off events. [2024-05-12 10:43:38,642 INFO L125 PetriNetUnfolderBase]: For 932635/932817 co-relation queries the response was YES. [2024-05-12 10:43:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74516 conditions, 10528 events. 6304/10528 cut-off events. For 932635/932817 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 79136 event pairs, 1924 based on Foata normal form. 75/10028 useless extension candidates. Maximal degree in co-relation 74313. Up to 9218 conditions per place. [2024-05-12 10:43:38,833 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 565 selfloop transitions, 87 changer transitions 0/665 dead transitions. [2024-05-12 10:43:38,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 665 transitions, 12714 flow [2024-05-12 10:43:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:43:38,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:43:38,834 INFO L175 Difference]: Start difference. First operand has 467 places, 625 transitions, 10920 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:43:38,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 665 transitions, 12714 flow [2024-05-12 10:43:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 665 transitions, 11926 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:46,615 INFO L231 Difference]: Finished difference. Result has 469 places, 631 transitions, 10500 flow [2024-05-12 10:43:46,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10132, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10500, PETRI_PLACES=469, PETRI_TRANSITIONS=631} [2024-05-12 10:43:46,616 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 419 predicate places. [2024-05-12 10:43:46,616 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 631 transitions, 10500 flow [2024-05-12 10:43:46,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:46,617 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] [2024-05-12 10:43:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-05-12 10:43:46,617 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:46,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:46,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1029901980, now seen corresponding path program 8 times [2024-05-12 10:43:46,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907254120] [2024-05-12 10:43:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:46,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:46,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:46,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907254120] [2024-05-12 10:43:46,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907254120] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:46,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:46,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456299147] [2024-05-12 10:43:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:46,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:46,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:47,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:47,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 631 transitions, 10500 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:47,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:47,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:47,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:49,247 INFO L124 PetriNetUnfolderBase]: 6299/10503 cut-off events. [2024-05-12 10:43:49,247 INFO L125 PetriNetUnfolderBase]: For 929575/929757 co-relation queries the response was YES. [2024-05-12 10:43:49,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73651 conditions, 10503 events. 6299/10503 cut-off events. For 929575/929757 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 78885 event pairs, 1942 based on Foata normal form. 75/10004 useless extension candidates. Maximal degree in co-relation 73446. Up to 9284 conditions per place. [2024-05-12 10:43:49,430 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 563 selfloop transitions, 82 changer transitions 0/658 dead transitions. [2024-05-12 10:43:49,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 658 transitions, 11860 flow [2024-05-12 10:43:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 10:43:49,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:43:49,432 INFO L175 Difference]: Start difference. First operand has 469 places, 631 transitions, 10500 flow. Second operand 8 states and 208 transitions. [2024-05-12 10:43:49,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 658 transitions, 11860 flow [2024-05-12 10:43:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 658 transitions, 11618 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:56,601 INFO L231 Difference]: Finished difference. Result has 472 places, 631 transitions, 10427 flow [2024-05-12 10:43:56,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10258, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10427, PETRI_PLACES=472, PETRI_TRANSITIONS=631} [2024-05-12 10:43:56,602 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 422 predicate places. [2024-05-12 10:43:56,602 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 631 transitions, 10427 flow [2024-05-12 10:43:56,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:56,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:56,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-05-12 10:43:56,603 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:56,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash -743014650, now seen corresponding path program 9 times [2024-05-12 10:43:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250782680] [2024-05-12 10:43:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:56,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:56,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250782680] [2024-05-12 10:43:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250782680] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:56,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:56,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:56,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915293096] [2024-05-12 10:43:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:57,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:57,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 631 transitions, 10427 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:57,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:57,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:57,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:59,349 INFO L124 PetriNetUnfolderBase]: 6320/10539 cut-off events. [2024-05-12 10:43:59,350 INFO L125 PetriNetUnfolderBase]: For 940685/940867 co-relation queries the response was YES. [2024-05-12 10:43:59,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73569 conditions, 10539 events. 6320/10539 cut-off events. For 940685/940867 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 79117 event pairs, 1944 based on Foata normal form. 75/10038 useless extension candidates. Maximal degree in co-relation 73363. Up to 9315 conditions per place. [2024-05-12 10:43:59,530 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 566 selfloop transitions, 83 changer transitions 0/662 dead transitions. [2024-05-12 10:43:59,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 662 transitions, 11841 flow [2024-05-12 10:43:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-05-12 10:43:59,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-05-12 10:43:59,532 INFO L175 Difference]: Start difference. First operand has 472 places, 631 transitions, 10427 flow. Second operand 10 states and 248 transitions. [2024-05-12 10:43:59,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 662 transitions, 11841 flow [2024-05-12 10:44:07,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 662 transitions, 11658 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:07,453 INFO L231 Difference]: Finished difference. Result has 476 places, 633 transitions, 10461 flow [2024-05-12 10:44:07,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10244, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10461, PETRI_PLACES=476, PETRI_TRANSITIONS=633} [2024-05-12 10:44:07,454 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 426 predicate places. [2024-05-12 10:44:07,454 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 633 transitions, 10461 flow [2024-05-12 10:44:07,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:07,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:07,454 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] [2024-05-12 10:44:07,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-05-12 10:44:07,455 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:07,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2063940782, now seen corresponding path program 10 times [2024-05-12 10:44:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:07,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601460943] [2024-05-12 10:44:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:07,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:07,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601460943] [2024-05-12 10:44:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601460943] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:07,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:07,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351613105] [2024-05-12 10:44:07,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:07,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:07,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 633 transitions, 10461 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:07,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:07,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:07,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:10,205 INFO L124 PetriNetUnfolderBase]: 6341/10575 cut-off events. [2024-05-12 10:44:10,205 INFO L125 PetriNetUnfolderBase]: For 955346/955528 co-relation queries the response was YES. [2024-05-12 10:44:10,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73896 conditions, 10575 events. 6341/10575 cut-off events. For 955346/955528 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 79396 event pairs, 1946 based on Foata normal form. 75/10072 useless extension candidates. Maximal degree in co-relation 73689. Up to 9364 conditions per place. [2024-05-12 10:44:10,386 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 572 selfloop transitions, 71 changer transitions 0/656 dead transitions. [2024-05-12 10:44:10,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 656 transitions, 11847 flow [2024-05-12 10:44:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:44:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:44:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 10:44:10,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-05-12 10:44:10,387 INFO L175 Difference]: Start difference. First operand has 476 places, 633 transitions, 10461 flow. Second operand 8 states and 202 transitions. [2024-05-12 10:44:10,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 656 transitions, 11847 flow [2024-05-12 10:44:18,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 656 transitions, 11656 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:18,359 INFO L231 Difference]: Finished difference. Result has 476 places, 635 transitions, 10467 flow [2024-05-12 10:44:18,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10270, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10467, PETRI_PLACES=476, PETRI_TRANSITIONS=635} [2024-05-12 10:44:18,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 426 predicate places. [2024-05-12 10:44:18,359 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 635 transitions, 10467 flow [2024-05-12 10:44:18,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:18,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:18,360 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] [2024-05-12 10:44:18,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-05-12 10:44:18,360 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:18,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1861360356, now seen corresponding path program 11 times [2024-05-12 10:44:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591527021] [2024-05-12 10:44:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:18,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:18,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591527021] [2024-05-12 10:44:18,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591527021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:18,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:18,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931073347] [2024-05-12 10:44:18,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:18,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:18,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 635 transitions, 10467 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:18,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:18,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:21,090 INFO L124 PetriNetUnfolderBase]: 6362/10622 cut-off events. [2024-05-12 10:44:21,090 INFO L125 PetriNetUnfolderBase]: For 972157/972363 co-relation queries the response was YES. [2024-05-12 10:44:21,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74180 conditions, 10622 events. 6362/10622 cut-off events. For 972157/972363 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 80084 event pairs, 1988 based on Foata normal form. 93/10165 useless extension candidates. Maximal degree in co-relation 73972. Up to 9184 conditions per place. [2024-05-12 10:44:21,268 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 465 selfloop transitions, 180 changer transitions 0/658 dead transitions. [2024-05-12 10:44:21,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 658 transitions, 11857 flow [2024-05-12 10:44:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:44:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:44:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:44:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:44:21,270 INFO L175 Difference]: Start difference. First operand has 476 places, 635 transitions, 10467 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:44:21,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 658 transitions, 11857 flow [2024-05-12 10:44:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 658 transitions, 11714 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:44:28,854 INFO L231 Difference]: Finished difference. Result has 479 places, 637 transitions, 10739 flow [2024-05-12 10:44:28,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10739, PETRI_PLACES=479, PETRI_TRANSITIONS=637} [2024-05-12 10:44:28,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 429 predicate places. [2024-05-12 10:44:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 637 transitions, 10739 flow [2024-05-12 10:44:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:28,855 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] [2024-05-12 10:44:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-05-12 10:44:28,856 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1858503396, now seen corresponding path program 12 times [2024-05-12 10:44:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233638073] [2024-05-12 10:44:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:29,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:29,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233638073] [2024-05-12 10:44:29,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233638073] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:29,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:29,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914295469] [2024-05-12 10:44:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:29,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:29,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 637 transitions, 10739 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:29,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:29,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:31,669 INFO L124 PetriNetUnfolderBase]: 6501/10863 cut-off events. [2024-05-12 10:44:31,669 INFO L125 PetriNetUnfolderBase]: For 1068204/1068413 co-relation queries the response was YES. [2024-05-12 10:44:31,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77348 conditions, 10863 events. 6501/10863 cut-off events. For 1068204/1068413 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 82222 event pairs, 2014 based on Foata normal form. 93/10398 useless extension candidates. Maximal degree in co-relation 77139. Up to 9215 conditions per place. [2024-05-12 10:44:31,844 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 467 selfloop transitions, 189 changer transitions 0/669 dead transitions. [2024-05-12 10:44:31,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 669 transitions, 12495 flow [2024-05-12 10:44:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:44:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:44:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:44:31,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:44:31,845 INFO L175 Difference]: Start difference. First operand has 479 places, 637 transitions, 10739 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:44:31,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 669 transitions, 12495 flow [2024-05-12 10:44:40,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 669 transitions, 12106 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:40,959 INFO L231 Difference]: Finished difference. Result has 482 places, 641 transitions, 10857 flow [2024-05-12 10:44:40,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10350, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10857, PETRI_PLACES=482, PETRI_TRANSITIONS=641} [2024-05-12 10:44:40,959 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 432 predicate places. [2024-05-12 10:44:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 641 transitions, 10857 flow [2024-05-12 10:44:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:40,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:40,960 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] [2024-05-12 10:44:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-05-12 10:44:40,960 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:40,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash -49296776, now seen corresponding path program 1 times [2024-05-12 10:44:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:40,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756854139] [2024-05-12 10:44:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:41,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:41,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756854139] [2024-05-12 10:44:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756854139] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:41,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:41,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252793970] [2024-05-12 10:44:41,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:41,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:41,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:41,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:41,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 641 transitions, 10857 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:41,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:41,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:41,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:43,808 INFO L124 PetriNetUnfolderBase]: 6522/10870 cut-off events. [2024-05-12 10:44:43,808 INFO L125 PetriNetUnfolderBase]: For 1082271/1082436 co-relation queries the response was YES. [2024-05-12 10:44:43,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77915 conditions, 10870 events. 6522/10870 cut-off events. For 1082271/1082436 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82000 event pairs, 1991 based on Foata normal form. 63/10337 useless extension candidates. Maximal degree in co-relation 77704. Up to 9638 conditions per place. [2024-05-12 10:44:43,982 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 586 selfloop transitions, 68 changer transitions 0/667 dead transitions. [2024-05-12 10:44:43,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 667 transitions, 12259 flow [2024-05-12 10:44:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:44:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:44:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 10:44:43,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-05-12 10:44:43,983 INFO L175 Difference]: Start difference. First operand has 482 places, 641 transitions, 10857 flow. Second operand 8 states and 204 transitions. [2024-05-12 10:44:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 667 transitions, 12259 flow [2024-05-12 10:44:53,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 667 transitions, 11866 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:44:53,882 INFO L231 Difference]: Finished difference. Result has 485 places, 643 transitions, 10641 flow [2024-05-12 10:44:53,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10464, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10641, PETRI_PLACES=485, PETRI_TRANSITIONS=643} [2024-05-12 10:44:53,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 435 predicate places. [2024-05-12 10:44:53,882 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 643 transitions, 10641 flow [2024-05-12 10:44:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:53,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:53,883 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] [2024-05-12 10:44:53,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-05-12 10:44:53,883 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:53,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1033615935, now seen corresponding path program 7 times [2024-05-12 10:44:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560520948] [2024-05-12 10:44:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560520948] [2024-05-12 10:44:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560520948] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:54,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:54,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056543549] [2024-05-12 10:44:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:54,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:54,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 643 transitions, 10641 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:54,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:54,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:54,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:56,770 INFO L124 PetriNetUnfolderBase]: 6563/10944 cut-off events. [2024-05-12 10:44:56,771 INFO L125 PetriNetUnfolderBase]: For 1115167/1115516 co-relation queries the response was YES. [2024-05-12 10:44:56,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78339 conditions, 10944 events. 6563/10944 cut-off events. For 1115167/1115516 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82567 event pairs, 2058 based on Foata normal form. 95/10431 useless extension candidates. Maximal degree in co-relation 78127. Up to 9213 conditions per place. [2024-05-12 10:44:56,957 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 300 changer transitions 0/677 dead transitions. [2024-05-12 10:44:56,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 677 transitions, 12793 flow [2024-05-12 10:44:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:44:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:44:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:44:56,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 10:44:56,958 INFO L175 Difference]: Start difference. First operand has 485 places, 643 transitions, 10641 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:44:56,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 677 transitions, 12793 flow [2024-05-12 10:45:07,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 677 transitions, 12640 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:07,511 INFO L231 Difference]: Finished difference. Result has 486 places, 655 transitions, 11368 flow [2024-05-12 10:45:07,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10488, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11368, PETRI_PLACES=486, PETRI_TRANSITIONS=655} [2024-05-12 10:45:07,512 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 436 predicate places. [2024-05-12 10:45:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 655 transitions, 11368 flow [2024-05-12 10:45:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:07,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:07,512 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] [2024-05-12 10:45:07,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-05-12 10:45:07,513 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:07,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash 115661833, now seen corresponding path program 8 times [2024-05-12 10:45:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:07,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669080372] [2024-05-12 10:45:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669080372] [2024-05-12 10:45:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669080372] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:07,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:07,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:07,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135797121] [2024-05-12 10:45:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:07,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:07,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:07,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 655 transitions, 11368 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:07,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:07,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:07,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:10,490 INFO L124 PetriNetUnfolderBase]: 6571/10947 cut-off events. [2024-05-12 10:45:10,490 INFO L125 PetriNetUnfolderBase]: For 1131516/1131701 co-relation queries the response was YES. [2024-05-12 10:45:10,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79238 conditions, 10947 events. 6571/10947 cut-off events. For 1131516/1131701 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82594 event pairs, 2011 based on Foata normal form. 65/10413 useless extension candidates. Maximal degree in co-relation 79025. Up to 9545 conditions per place. [2024-05-12 10:45:10,675 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 481 selfloop transitions, 189 changer transitions 0/683 dead transitions. [2024-05-12 10:45:10,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 683 transitions, 12815 flow [2024-05-12 10:45:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:45:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:45:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 10:45:10,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-05-12 10:45:10,676 INFO L175 Difference]: Start difference. First operand has 486 places, 655 transitions, 11368 flow. Second operand 9 states and 230 transitions. [2024-05-12 10:45:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 683 transitions, 12815 flow [2024-05-12 10:45:20,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 683 transitions, 12435 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:45:20,206 INFO L231 Difference]: Finished difference. Result has 492 places, 658 transitions, 11423 flow [2024-05-12 10:45:20,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10991, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11423, PETRI_PLACES=492, PETRI_TRANSITIONS=658} [2024-05-12 10:45:20,206 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 442 predicate places. [2024-05-12 10:45:20,206 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 658 transitions, 11423 flow [2024-05-12 10:45:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:20,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:20,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-05-12 10:45:20,207 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:20,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1029896865, now seen corresponding path program 9 times [2024-05-12 10:45:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495416986] [2024-05-12 10:45:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:20,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:20,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495416986] [2024-05-12 10:45:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495416986] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:20,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:20,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63425819] [2024-05-12 10:45:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:20,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:20,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 658 transitions, 11423 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:20,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:23,172 INFO L124 PetriNetUnfolderBase]: 6579/10959 cut-off events. [2024-05-12 10:45:23,173 INFO L125 PetriNetUnfolderBase]: For 1148445/1148630 co-relation queries the response was YES. [2024-05-12 10:45:23,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79137 conditions, 10959 events. 6579/10959 cut-off events. For 1148445/1148630 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82663 event pairs, 2011 based on Foata normal form. 65/10422 useless extension candidates. Maximal degree in co-relation 78923. Up to 9549 conditions per place. [2024-05-12 10:45:23,380 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 479 selfloop transitions, 194 changer transitions 0/686 dead transitions. [2024-05-12 10:45:23,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 686 transitions, 12877 flow [2024-05-12 10:45:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:45:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:45:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 10:45:23,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603864734299517 [2024-05-12 10:45:23,382 INFO L175 Difference]: Start difference. First operand has 492 places, 658 transitions, 11423 flow. Second operand 9 states and 232 transitions. [2024-05-12 10:45:23,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 686 transitions, 12877 flow [2024-05-12 10:45:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 686 transitions, 12491 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:45:34,883 INFO L231 Difference]: Finished difference. Result has 494 places, 661 transitions, 11483 flow [2024-05-12 10:45:34,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11037, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11483, PETRI_PLACES=494, PETRI_TRANSITIONS=661} [2024-05-12 10:45:34,884 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 444 predicate places. [2024-05-12 10:45:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 661 transitions, 11483 flow [2024-05-12 10:45:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:34,884 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] [2024-05-12 10:45:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-05-12 10:45:34,885 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:34,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1992002603, now seen corresponding path program 10 times [2024-05-12 10:45:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111030967] [2024-05-12 10:45:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:35,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111030967] [2024-05-12 10:45:35,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111030967] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:35,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:35,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:45:35,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807555600] [2024-05-12 10:45:35,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:35,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:45:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:45:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:45:35,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:35,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 661 transitions, 11483 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:35,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:35,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:35,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:37,795 INFO L124 PetriNetUnfolderBase]: 6587/10984 cut-off events. [2024-05-12 10:45:37,795 INFO L125 PetriNetUnfolderBase]: For 1169152/1169514 co-relation queries the response was YES. [2024-05-12 10:45:37,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79400 conditions, 10984 events. 6587/10984 cut-off events. For 1169152/1169514 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82845 event pairs, 2021 based on Foata normal form. 158/10532 useless extension candidates. Maximal degree in co-relation 79185. Up to 9240 conditions per place. [2024-05-12 10:45:37,996 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 348 selfloop transitions, 334 changer transitions 0/695 dead transitions. [2024-05-12 10:45:37,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 695 transitions, 13751 flow [2024-05-12 10:45:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:45:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:45:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-05-12 10:45:37,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772946859903382 [2024-05-12 10:45:37,997 INFO L175 Difference]: Start difference. First operand has 494 places, 661 transitions, 11483 flow. Second operand 9 states and 239 transitions. [2024-05-12 10:45:37,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 695 transitions, 13751 flow [2024-05-12 10:45:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 695 transitions, 13351 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:45:46,375 INFO L231 Difference]: Finished difference. Result has 496 places, 664 transitions, 11823 flow [2024-05-12 10:45:46,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11823, PETRI_PLACES=496, PETRI_TRANSITIONS=664} [2024-05-12 10:45:46,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 446 predicate places. [2024-05-12 10:45:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 664 transitions, 11823 flow [2024-05-12 10:45:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:46,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:46,376 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] [2024-05-12 10:45:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-05-12 10:45:46,376 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:46,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash 287436553, now seen corresponding path program 11 times [2024-05-12 10:45:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861273815] [2024-05-12 10:45:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:46,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:46,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861273815] [2024-05-12 10:45:46,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861273815] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:46,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:46,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:46,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338998770] [2024-05-12 10:45:46,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:46,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:46,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:46,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:46,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 664 transitions, 11823 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:46,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:46,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:46,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:49,354 INFO L124 PetriNetUnfolderBase]: 6606/10987 cut-off events. [2024-05-12 10:45:49,355 INFO L125 PetriNetUnfolderBase]: For 1192386/1192503 co-relation queries the response was YES. [2024-05-12 10:45:49,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80393 conditions, 10987 events. 6606/10987 cut-off events. For 1192386/1192503 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 82596 event pairs, 1974 based on Foata normal form. 30/10378 useless extension candidates. Maximal degree in co-relation 80177. Up to 9261 conditions per place. [2024-05-12 10:45:49,551 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 341 selfloop transitions, 353 changer transitions 0/707 dead transitions. [2024-05-12 10:45:49,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 707 transitions, 14213 flow [2024-05-12 10:45:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:45:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:45:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 304 transitions. [2024-05-12 10:45:49,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:45:49,553 INFO L175 Difference]: Start difference. First operand has 496 places, 664 transitions, 11823 flow. Second operand 12 states and 304 transitions. [2024-05-12 10:45:49,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 707 transitions, 14213 flow [2024-05-12 10:45:59,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 707 transitions, 13225 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:59,687 INFO L231 Difference]: Finished difference. Result has 500 places, 670 transitions, 11691 flow [2024-05-12 10:45:59,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10853, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11691, PETRI_PLACES=500, PETRI_TRANSITIONS=670} [2024-05-12 10:45:59,688 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 450 predicate places. [2024-05-12 10:45:59,688 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 670 transitions, 11691 flow [2024-05-12 10:45:59,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:59,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:59,688 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] [2024-05-12 10:45:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-05-12 10:45:59,688 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:59,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -858127725, now seen corresponding path program 12 times [2024-05-12 10:45:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:59,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100410417] [2024-05-12 10:45:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100410417] [2024-05-12 10:46:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100410417] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:46:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318136920] [2024-05-12 10:46:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:46:00,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:46:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:46:00,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:00,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 670 transitions, 11691 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:00,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:00,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:00,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:02,567 INFO L124 PetriNetUnfolderBase]: 6603/11008 cut-off events. [2024-05-12 10:46:02,568 INFO L125 PetriNetUnfolderBase]: For 1201575/1201925 co-relation queries the response was YES. [2024-05-12 10:46:02,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80202 conditions, 11008 events. 6603/11008 cut-off events. For 1201575/1201925 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 83103 event pairs, 2021 based on Foata normal form. 139/10531 useless extension candidates. Maximal degree in co-relation 79985. Up to 9258 conditions per place. [2024-05-12 10:46:02,767 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 341 selfloop transitions, 344 changer transitions 0/698 dead transitions. [2024-05-12 10:46:02,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 698 transitions, 13645 flow [2024-05-12 10:46:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:46:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:46:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-05-12 10:46:02,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558695652173913 [2024-05-12 10:46:02,777 INFO L175 Difference]: Start difference. First operand has 500 places, 670 transitions, 11691 flow. Second operand 10 states and 257 transitions. [2024-05-12 10:46:02,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 698 transitions, 13645 flow [2024-05-12 10:46:14,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 698 transitions, 13004 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-05-12 10:46:14,280 INFO L231 Difference]: Finished difference. Result has 502 places, 670 transitions, 11744 flow [2024-05-12 10:46:14,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11050, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11744, PETRI_PLACES=502, PETRI_TRANSITIONS=670} [2024-05-12 10:46:14,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 452 predicate places. [2024-05-12 10:46:14,280 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 670 transitions, 11744 flow [2024-05-12 10:46:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:14,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:14,281 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, 1] [2024-05-12 10:46:14,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-05-12 10:46:14,281 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:14,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1874669891, now seen corresponding path program 13 times [2024-05-12 10:46:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:14,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178165203] [2024-05-12 10:46:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178165203] [2024-05-12 10:46:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178165203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:14,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:14,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570031943] [2024-05-12 10:46:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:14,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:14,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 670 transitions, 11744 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:14,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:17,303 INFO L124 PetriNetUnfolderBase]: 6633/11037 cut-off events. [2024-05-12 10:46:17,303 INFO L125 PetriNetUnfolderBase]: For 1233886/1234050 co-relation queries the response was YES. [2024-05-12 10:46:17,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80970 conditions, 11037 events. 6633/11037 cut-off events. For 1233886/1234050 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83242 event pairs, 2008 based on Foata normal form. 54/10468 useless extension candidates. Maximal degree in co-relation 80752. Up to 9594 conditions per place. [2024-05-12 10:46:17,520 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 490 selfloop transitions, 208 changer transitions 0/711 dead transitions. [2024-05-12 10:46:17,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 711 transitions, 13952 flow [2024-05-12 10:46:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:46:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:46:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 339 transitions. [2024-05-12 10:46:17,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263975155279503 [2024-05-12 10:46:17,522 INFO L175 Difference]: Start difference. First operand has 502 places, 670 transitions, 11744 flow. Second operand 14 states and 339 transitions. [2024-05-12 10:46:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 711 transitions, 13952 flow [2024-05-12 10:46:26,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 711 transitions, 13368 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:46:26,699 INFO L231 Difference]: Finished difference. Result has 509 places, 679 transitions, 11818 flow [2024-05-12 10:46:26,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11169, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11818, PETRI_PLACES=509, PETRI_TRANSITIONS=679} [2024-05-12 10:46:26,699 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 459 predicate places. [2024-05-12 10:46:26,699 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 679 transitions, 11818 flow [2024-05-12 10:46:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:26,700 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] [2024-05-12 10:46:26,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-05-12 10:46:26,700 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1846489225, now seen corresponding path program 14 times [2024-05-12 10:46:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827090454] [2024-05-12 10:46:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:27,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827090454] [2024-05-12 10:46:27,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827090454] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:27,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:27,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380956887] [2024-05-12 10:46:27,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:27,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:27,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 679 transitions, 11818 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:27,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:27,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:27,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:29,679 INFO L124 PetriNetUnfolderBase]: 6641/11051 cut-off events. [2024-05-12 10:46:29,680 INFO L125 PetriNetUnfolderBase]: For 1250868/1251069 co-relation queries the response was YES. [2024-05-12 10:46:29,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80831 conditions, 11051 events. 6641/11051 cut-off events. For 1250868/1251069 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83342 event pairs, 2011 based on Foata normal form. 81/10515 useless extension candidates. Maximal degree in co-relation 80611. Up to 9633 conditions per place. [2024-05-12 10:46:29,879 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 506 selfloop transitions, 190 changer transitions 0/709 dead transitions. [2024-05-12 10:46:29,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 709 transitions, 13351 flow [2024-05-12 10:46:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:46:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:46:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-05-12 10:46:29,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395256916996047 [2024-05-12 10:46:29,880 INFO L175 Difference]: Start difference. First operand has 509 places, 679 transitions, 11818 flow. Second operand 11 states and 273 transitions. [2024-05-12 10:46:29,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 709 transitions, 13351 flow [2024-05-12 10:46:39,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 709 transitions, 13013 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-05-12 10:46:40,364 INFO L231 Difference]: Finished difference. Result has 511 places, 682 transitions, 11947 flow [2024-05-12 10:46:40,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11500, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11947, PETRI_PLACES=511, PETRI_TRANSITIONS=682} [2024-05-12 10:46:40,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 461 predicate places. [2024-05-12 10:46:40,377 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 682 transitions, 11947 flow [2024-05-12 10:46:40,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:40,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:40,377 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] [2024-05-12 10:46:40,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-05-12 10:46:40,377 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:40,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash 111027977, now seen corresponding path program 15 times [2024-05-12 10:46:40,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:40,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028446679] [2024-05-12 10:46:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:40,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:40,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028446679] [2024-05-12 10:46:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028446679] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:40,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:40,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082468094] [2024-05-12 10:46:40,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:40,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:40,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:41,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:41,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 682 transitions, 11947 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:41,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:41,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:41,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:44,180 INFO L124 PetriNetUnfolderBase]: 6649/11062 cut-off events. [2024-05-12 10:46:44,180 INFO L125 PetriNetUnfolderBase]: For 1266683/1266873 co-relation queries the response was YES. [2024-05-12 10:46:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81370 conditions, 11062 events. 6649/11062 cut-off events. For 1266683/1266873 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83422 event pairs, 2010 based on Foata normal form. 70/10507 useless extension candidates. Maximal degree in co-relation 81148. Up to 9633 conditions per place. [2024-05-12 10:46:44,357 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 501 selfloop transitions, 201 changer transitions 0/715 dead transitions. [2024-05-12 10:46:44,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 715 transitions, 13745 flow [2024-05-12 10:46:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:46:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:46:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 311 transitions. [2024-05-12 10:46:44,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520066889632107 [2024-05-12 10:46:44,359 INFO L175 Difference]: Start difference. First operand has 511 places, 682 transitions, 11947 flow. Second operand 13 states and 311 transitions. [2024-05-12 10:46:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 715 transitions, 13745 flow [2024-05-12 10:46:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 715 transitions, 13217 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-05-12 10:46:54,325 INFO L231 Difference]: Finished difference. Result has 514 places, 685 transitions, 11891 flow [2024-05-12 10:46:54,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11422, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11891, PETRI_PLACES=514, PETRI_TRANSITIONS=685} [2024-05-12 10:46:54,325 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 464 predicate places. [2024-05-12 10:46:54,325 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 685 transitions, 11891 flow [2024-05-12 10:46:54,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:54,326 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] [2024-05-12 10:46:54,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-05-12 10:46:54,326 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:54,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash -627955261, now seen corresponding path program 16 times [2024-05-12 10:46:54,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:54,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620890235] [2024-05-12 10:46:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:54,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620890235] [2024-05-12 10:46:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620890235] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:54,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412121115] [2024-05-12 10:46:54,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:54,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:54,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:54,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:54,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 685 transitions, 11891 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:54,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:54,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:58,214 INFO L124 PetriNetUnfolderBase]: 6657/11073 cut-off events. [2024-05-12 10:46:58,214 INFO L125 PetriNetUnfolderBase]: For 1282110/1282274 co-relation queries the response was YES. [2024-05-12 10:46:58,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81530 conditions, 11073 events. 6657/11073 cut-off events. For 1282110/1282274 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83403 event pairs, 2008 based on Foata normal form. 54/10495 useless extension candidates. Maximal degree in co-relation 81307. Up to 9621 conditions per place. [2024-05-12 10:46:58,400 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 486 selfloop transitions, 220 changer transitions 0/719 dead transitions. [2024-05-12 10:46:58,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 719 transitions, 13970 flow [2024-05-12 10:46:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:46:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:46:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 316 transitions. [2024-05-12 10:46:58,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284280936454849 [2024-05-12 10:46:58,401 INFO L175 Difference]: Start difference. First operand has 514 places, 685 transitions, 11891 flow. Second operand 13 states and 316 transitions. [2024-05-12 10:46:58,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 719 transitions, 13970 flow [2024-05-12 10:47:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 719 transitions, 13564 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-05-12 10:47:08,920 INFO L231 Difference]: Finished difference. Result has 517 places, 688 transitions, 11992 flow [2024-05-12 10:47:08,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11485, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11992, PETRI_PLACES=517, PETRI_TRANSITIONS=688} [2024-05-12 10:47:08,921 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 467 predicate places. [2024-05-12 10:47:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 688 transitions, 11992 flow [2024-05-12 10:47:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:08,921 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] [2024-05-12 10:47:08,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-05-12 10:47:08,921 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:08,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -488461567, now seen corresponding path program 17 times [2024-05-12 10:47:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840933048] [2024-05-12 10:47:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:09,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840933048] [2024-05-12 10:47:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840933048] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:09,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:09,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:09,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217819603] [2024-05-12 10:47:09,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:09,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:09,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 688 transitions, 11992 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:09,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:09,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:09,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:12,722 INFO L124 PetriNetUnfolderBase]: 6654/11069 cut-off events. [2024-05-12 10:47:12,723 INFO L125 PetriNetUnfolderBase]: For 1291023/1291182 co-relation queries the response was YES. [2024-05-12 10:47:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81534 conditions, 11069 events. 6654/11069 cut-off events. For 1291023/1291182 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83375 event pairs, 2008 based on Foata normal form. 49/10483 useless extension candidates. Maximal degree in co-relation 81310. Up to 9618 conditions per place. [2024-05-12 10:47:13,051 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 487 selfloop transitions, 217 changer transitions 0/717 dead transitions. [2024-05-12 10:47:13,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 717 transitions, 13738 flow [2024-05-12 10:47:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:47:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:47:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 296 transitions. [2024-05-12 10:47:13,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:47:13,053 INFO L175 Difference]: Start difference. First operand has 517 places, 688 transitions, 11992 flow. Second operand 12 states and 296 transitions. [2024-05-12 10:47:13,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 717 transitions, 13738 flow [2024-05-12 10:47:24,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 717 transitions, 13270 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-05-12 10:47:24,045 INFO L231 Difference]: Finished difference. Result has 519 places, 688 transitions, 11964 flow [2024-05-12 10:47:24,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11524, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11964, PETRI_PLACES=519, PETRI_TRANSITIONS=688} [2024-05-12 10:47:24,057 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 469 predicate places. [2024-05-12 10:47:24,058 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 688 transitions, 11964 flow [2024-05-12 10:47:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:24,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:24,058 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] [2024-05-12 10:47:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-05-12 10:47:24,058 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -742657995, now seen corresponding path program 18 times [2024-05-12 10:47:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:24,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721915522] [2024-05-12 10:47:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:24,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:24,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721915522] [2024-05-12 10:47:24,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721915522] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:24,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:24,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329135475] [2024-05-12 10:47:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:24,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:24,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 688 transitions, 11964 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:24,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:24,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:24,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:27,662 INFO L124 PetriNetUnfolderBase]: 6651/11066 cut-off events. [2024-05-12 10:47:27,663 INFO L125 PetriNetUnfolderBase]: For 1298994/1299173 co-relation queries the response was YES. [2024-05-12 10:47:27,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81444 conditions, 11066 events. 6651/11066 cut-off events. For 1298994/1299173 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83401 event pairs, 2010 based on Foata normal form. 61/10496 useless extension candidates. Maximal degree in co-relation 81219. Up to 9636 conditions per place. [2024-05-12 10:47:27,850 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 505 selfloop transitions, 201 changer transitions 0/719 dead transitions. [2024-05-12 10:47:27,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 719 transitions, 13450 flow [2024-05-12 10:47:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:47:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:47:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 350 transitions. [2024-05-12 10:47:27,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-05-12 10:47:27,852 INFO L175 Difference]: Start difference. First operand has 519 places, 688 transitions, 11964 flow. Second operand 15 states and 350 transitions. [2024-05-12 10:47:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 719 transitions, 13450 flow [2024-05-12 10:47:38,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 719 transitions, 12982 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-05-12 10:47:38,816 INFO L231 Difference]: Finished difference. Result has 522 places, 688 transitions, 11904 flow [2024-05-12 10:47:38,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11496, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11904, PETRI_PLACES=522, PETRI_TRANSITIONS=688} [2024-05-12 10:47:38,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 472 predicate places. [2024-05-12 10:47:38,817 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 688 transitions, 11904 flow [2024-05-12 10:47:38,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:38,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:38,817 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] [2024-05-12 10:47:38,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-05-12 10:47:38,818 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:38,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2078408554, now seen corresponding path program 2 times [2024-05-12 10:47:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195576403] [2024-05-12 10:47:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195576403] [2024-05-12 10:47:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195576403] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:39,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:39,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143862016] [2024-05-12 10:47:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:39,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:39,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 688 transitions, 11904 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:39,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:39,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:39,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:42,375 INFO L124 PetriNetUnfolderBase]: 6672/11096 cut-off events. [2024-05-12 10:47:42,376 INFO L125 PetriNetUnfolderBase]: For 1324742/1324867 co-relation queries the response was YES. [2024-05-12 10:47:42,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81734 conditions, 11096 events. 6672/11096 cut-off events. For 1324742/1324867 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 83654 event pairs, 1991 based on Foata normal form. 39/10484 useless extension candidates. Maximal degree in co-relation 81508. Up to 9831 conditions per place. [2024-05-12 10:47:42,583 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 631 selfloop transitions, 68 changer transitions 0/712 dead transitions. [2024-05-12 10:47:42,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 712 transitions, 13394 flow [2024-05-12 10:47:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 10:47:42,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:47:42,584 INFO L175 Difference]: Start difference. First operand has 522 places, 688 transitions, 11904 flow. Second operand 9 states and 222 transitions. [2024-05-12 10:47:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 712 transitions, 13394 flow [2024-05-12 10:47:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 712 transitions, 12966 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-05-12 10:47:54,298 INFO L231 Difference]: Finished difference. Result has 516 places, 690 transitions, 11657 flow [2024-05-12 10:47:54,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11476, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11657, PETRI_PLACES=516, PETRI_TRANSITIONS=690} [2024-05-12 10:47:54,299 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 466 predicate places. [2024-05-12 10:47:54,299 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 690 transitions, 11657 flow [2024-05-12 10:47:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:54,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:54,299 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] [2024-05-12 10:47:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-05-12 10:47:54,300 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1839402047, now seen corresponding path program 19 times [2024-05-12 10:47:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038187905] [2024-05-12 10:47:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:54,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038187905] [2024-05-12 10:47:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038187905] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:54,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751736553] [2024-05-12 10:47:54,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:54,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:54,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:54,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 690 transitions, 11657 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:57,905 INFO L124 PetriNetUnfolderBase]: 6724/11186 cut-off events. [2024-05-12 10:47:57,905 INFO L125 PetriNetUnfolderBase]: For 1375292/1375525 co-relation queries the response was YES. [2024-05-12 10:47:58,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82762 conditions, 11186 events. 6724/11186 cut-off events. For 1375292/1375525 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 84454 event pairs, 2074 based on Foata normal form. 37/10607 useless extension candidates. Maximal degree in co-relation 82535. Up to 9284 conditions per place. [2024-05-12 10:47:58,098 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 290 selfloop transitions, 427 changer transitions 0/730 dead transitions. [2024-05-12 10:47:58,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 730 transitions, 14575 flow [2024-05-12 10:47:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-05-12 10:47:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:47:58,099 INFO L175 Difference]: Start difference. First operand has 516 places, 690 transitions, 11657 flow. Second operand 11 states and 275 transitions. [2024-05-12 10:47:58,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 730 transitions, 14575 flow [2024-05-12 10:48:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 730 transitions, 14418 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 10:48:08,656 INFO L231 Difference]: Finished difference. Result has 520 places, 705 transitions, 12690 flow [2024-05-12 10:48:08,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11500, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12690, PETRI_PLACES=520, PETRI_TRANSITIONS=705} [2024-05-12 10:48:08,657 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 470 predicate places. [2024-05-12 10:48:08,657 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 705 transitions, 12690 flow [2024-05-12 10:48:08,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:08,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:08,657 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] [2024-05-12 10:48:08,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-05-12 10:48:08,658 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:08,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1977008181, now seen corresponding path program 20 times [2024-05-12 10:48:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:08,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234523367] [2024-05-12 10:48:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:09,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234523367] [2024-05-12 10:48:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234523367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:09,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:09,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270726479] [2024-05-12 10:48:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:09,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:48:09,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 705 transitions, 12690 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:09,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:09,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:48:09,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:12,312 INFO L124 PetriNetUnfolderBase]: 6754/11222 cut-off events. [2024-05-12 10:48:12,312 INFO L125 PetriNetUnfolderBase]: For 1418164/1418359 co-relation queries the response was YES. [2024-05-12 10:48:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84665 conditions, 11222 events. 6754/11222 cut-off events. For 1418164/1418359 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 84554 event pairs, 2012 based on Foata normal form. 77/10648 useless extension candidates. Maximal degree in co-relation 84437. Up to 9811 conditions per place. [2024-05-12 10:48:12,512 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 562 selfloop transitions, 165 changer transitions 0/740 dead transitions. [2024-05-12 10:48:12,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 740 transitions, 14990 flow [2024-05-12 10:48:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:48:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:48:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 327 transitions. [2024-05-12 10:48:12,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077639751552795 [2024-05-12 10:48:12,513 INFO L175 Difference]: Start difference. First operand has 520 places, 705 transitions, 12690 flow. Second operand 14 states and 327 transitions. [2024-05-12 10:48:12,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 740 transitions, 14990 flow [2024-05-12 10:48:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 740 transitions, 13954 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-05-12 10:48:24,410 INFO L231 Difference]: Finished difference. Result has 529 places, 714 transitions, 12250 flow [2024-05-12 10:48:24,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11744, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12250, PETRI_PLACES=529, PETRI_TRANSITIONS=714} [2024-05-12 10:48:24,411 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 479 predicate places. [2024-05-12 10:48:24,411 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 714 transitions, 12250 flow [2024-05-12 10:48:24,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:24,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:24,411 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] [2024-05-12 10:48:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-05-12 10:48:24,412 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:24,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 558920699, now seen corresponding path program 21 times [2024-05-12 10:48:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:24,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867182966] [2024-05-12 10:48:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:24,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:24,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867182966] [2024-05-12 10:48:24,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867182966] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:24,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555891086] [2024-05-12 10:48:24,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:24,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:24,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:48:24,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 714 transitions, 12250 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:24,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:24,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:48:24,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:28,158 INFO L124 PetriNetUnfolderBase]: 6773/11247 cut-off events. [2024-05-12 10:48:28,158 INFO L125 PetriNetUnfolderBase]: For 1438390/1438569 co-relation queries the response was YES. [2024-05-12 10:48:28,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83936 conditions, 11247 events. 6773/11247 cut-off events. For 1438390/1438569 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 84721 event pairs, 2009 based on Foata normal form. 61/10639 useless extension candidates. Maximal degree in co-relation 83705. Up to 9848 conditions per place. [2024-05-12 10:48:28,364 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 575 selfloop transitions, 155 changer transitions 0/743 dead transitions. [2024-05-12 10:48:28,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 743 transitions, 14150 flow [2024-05-12 10:48:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:48:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:48:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-05-12 10:48:28,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163043478260869 [2024-05-12 10:48:28,365 INFO L175 Difference]: Start difference. First operand has 529 places, 714 transitions, 12250 flow. Second operand 12 states and 285 transitions. [2024-05-12 10:48:28,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 743 transitions, 14150 flow [2024-05-12 10:48:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 743 transitions, 13802 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-05-12 10:48:42,716 INFO L231 Difference]: Finished difference. Result has 532 places, 720 transitions, 12342 flow [2024-05-12 10:48:42,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11902, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12342, PETRI_PLACES=532, PETRI_TRANSITIONS=720} [2024-05-12 10:48:42,717 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 482 predicate places. [2024-05-12 10:48:42,717 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 720 transitions, 12342 flow [2024-05-12 10:48:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:42,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:42,718 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] [2024-05-12 10:48:42,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-05-12 10:48:42,718 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:42,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2090057965, now seen corresponding path program 22 times [2024-05-12 10:48:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:42,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343985325] [2024-05-12 10:48:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:42,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343985325] [2024-05-12 10:48:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343985325] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:43,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:43,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:43,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133277577] [2024-05-12 10:48:43,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:43,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:43,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:43,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:48:43,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 720 transitions, 12342 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:43,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:43,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:48:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15