./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_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/safe013_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/safe013_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe013_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 10:35:54,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:35:54,715 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:35:54,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:35:54,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:35:54,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:35:54,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:35:54,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:35:54,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:35:54,749 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:35:54,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:35:54,749 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:35:54,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:35:54,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:35:54,751 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:35:54,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:35:54,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:35:54,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:35:54,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:35:54,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:35:54,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:35:54,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:35:54,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:35:54,754 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:35:54,754 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:35:54,754 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:35:54,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:35:54,755 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:35:54,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:35:54,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:35:54,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:35:54,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:35:54,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:35:54,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:35:54,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:35:54,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:35:54,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:35:54,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:35:54,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:35:54,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:35:54,758 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:35:54,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:35:54,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:35:54,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:35:54,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:35:54,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:35:54,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:35:54,984 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:35:54,984 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:35:54,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-05-12 10:35:56,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:35:56,226 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:35:56,226 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-05-12 10:35:56,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56dd23355/141b7f5a98de40469b3e4c99a259056e/FLAG1341318be [2024-05-12 10:35:56,248 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56dd23355/141b7f5a98de40469b3e4c99a259056e [2024-05-12 10:35:56,250 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:35:56,251 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:35:56,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe013_tso.yml/witness.yml [2024-05-12 10:35:56,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:35:56,372 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:35:56,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:35:56,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:35:56,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:35:56,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:35:56" (1/2) ... [2024-05-12 10:35:56,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523ea03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:35:56, skipping insertion in model container [2024-05-12 10:35:56,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:35:56" (1/2) ... [2024-05-12 10:35:56,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fa27972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:35:56, skipping insertion in model container [2024-05-12 10:35:56,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:35:56" (2/2) ... [2024-05-12 10:35:56,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523ea03e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56, skipping insertion in model container [2024-05-12 10:35:56,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:35:56" (2/2) ... [2024-05-12 10:35:56,380 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:35:56,426 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:35:56,427 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:35:56,428 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:35:56,428 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:35:56,428 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:35:56,428 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-05-12 10:35:56,465 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:35:56,630 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/safe013_tso.i[945,958] [2024-05-12 10:35:56,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:35:56,781 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:35:56,813 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/safe013_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:35:56,917 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:35:56,956 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:35:56,956 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56 WrapperNode [2024-05-12 10:35:56,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:35:56,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:35:56,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:35:56,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:35:56,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:56,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,000 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:35:57,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:35:57,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:35:57,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:35:57,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:35:57,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,034 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 10:35:57,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:35:57,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:35:57,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:35:57,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:35:57,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (1/1) ... [2024-05-12 10:35:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:35:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:35:57,084 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 10:35:57,103 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 10:35:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:35:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:35:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:35:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:35:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:35:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:35:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:35:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:35:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:35:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:35:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:35:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:35:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:35:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:35:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:35:57,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:35:57,117 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 10:35:57,229 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:35:57,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:35:57,547 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:35:57,548 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:35:57,630 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:35:57,630 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:35:57,631 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:35:57 BoogieIcfgContainer [2024-05-12 10:35:57,631 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:35:57,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:35:57,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:35:57,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:35:57,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:35:56" (1/4) ... [2024-05-12 10:35:57,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d65876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:35:57, skipping insertion in model container [2024-05-12 10:35:57,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:35:56" (2/4) ... [2024-05-12 10:35:57,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d65876 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:35:57, skipping insertion in model container [2024-05-12 10:35:57,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:35:56" (3/4) ... [2024-05-12 10:35:57,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d65876 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:35:57, skipping insertion in model container [2024-05-12 10:35:57,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:35:57" (4/4) ... [2024-05-12 10:35:57,640 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-05-12 10:35:57,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:35:57,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:35:57,655 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:35:57,702 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:35:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 10:35:57,761 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-05-12 10:35:57,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:35:57,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-05-12 10:35:57,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 10:35:57,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-05-12 10:35:57,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:35:57,786 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;@502dcb7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:35:57,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:35:57,791 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:35:57,791 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:35:57,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:35:57,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:57,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:35:57,793 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 10:35:57,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1787111274, now seen corresponding path program 1 times [2024-05-12 10:35:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965390290] [2024-05-12 10:35:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:58,546 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 10:35:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965390290] [2024-05-12 10:35:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965390290] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:58,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:35:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171957534] [2024-05-12 10:35:58,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:35:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:35:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:35:58,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-05-12 10:35:58,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 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 10:35:58,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:58,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-05-12 10:35:58,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:58,882 INFO L124 PetriNetUnfolderBase]: 971/1701 cut-off events. [2024-05-12 10:35:58,882 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-05-12 10:35:58,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3223 conditions, 1701 events. 971/1701 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9908 event pairs, 694 based on Foata normal form. 1/1624 useless extension candidates. Maximal degree in co-relation 3208. Up to 1455 conditions per place. [2024-05-12 10:35:58,896 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 34 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-05-12 10:35:58,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 197 flow [2024-05-12 10:35:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:35:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:35:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-05-12 10:35:58,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6950354609929078 [2024-05-12 10:35:58,906 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 98 transitions. [2024-05-12 10:35:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 197 flow [2024-05-12 10:35:58,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:58,910 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 118 flow [2024-05-12 10:35:58,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-05-12 10:35:58,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-05-12 10:35:58,914 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 118 flow [2024-05-12 10:35:58,914 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 10:35:58,914 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] [2024-05-12 10:35:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:35:58,915 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 10:35:58,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:58,915 INFO L85 PathProgramCache]: Analyzing trace with hash 573027253, now seen corresponding path program 1 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 [1849939963] [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 10:35:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:59,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849939963] [2024-05-12 10:35:59,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849939963] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:59,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:35:59,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243195990] [2024-05-12 10:35:59,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:59,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:35:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:35:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:35:59,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-05-12 10:35:59,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:59,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:59,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-05-12 10:35:59,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:59,387 INFO L124 PetriNetUnfolderBase]: 978/1622 cut-off events. [2024-05-12 10:35:59,388 INFO L125 PetriNetUnfolderBase]: For 298/306 co-relation queries the response was YES. [2024-05-12 10:35:59,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3588 conditions, 1622 events. 978/1622 cut-off events. For 298/306 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9117 event pairs, 462 based on Foata normal form. 7/1591 useless extension candidates. Maximal degree in co-relation 3573. Up to 1421 conditions per place. [2024-05-12 10:35:59,398 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 45 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-05-12 10:35:59,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 302 flow [2024-05-12 10:35:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:35:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:35:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-05-12 10:35:59,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074468085106383 [2024-05-12 10:35:59,405 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 118 flow. Second operand 4 states and 133 transitions. [2024-05-12 10:35:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 302 flow [2024-05-12 10:35:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:59,410 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 190 flow [2024-05-12 10:35:59,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-05-12 10:35:59,415 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-05-12 10:35:59,415 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 190 flow [2024-05-12 10:35:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:59,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:59,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:35:59,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:59,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1814647613, now seen corresponding path program 1 times [2024-05-12 10:35:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:59,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454978787] [2024-05-12 10:35:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:59,824 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 10:35:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:59,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454978787] [2024-05-12 10:35:59,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454978787] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:59,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:59,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:35:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419431216] [2024-05-12 10:35:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:35:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:35:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:35:59,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:35:59,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:59,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:59,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:35:59,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:00,017 INFO L124 PetriNetUnfolderBase]: 1255/2234 cut-off events. [2024-05-12 10:36:00,018 INFO L125 PetriNetUnfolderBase]: For 1380/1397 co-relation queries the response was YES. [2024-05-12 10:36:00,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5518 conditions, 2234 events. 1255/2234 cut-off events. For 1380/1397 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13253 event pairs, 808 based on Foata normal form. 8/2218 useless extension candidates. Maximal degree in co-relation 5500. Up to 1852 conditions per place. [2024-05-12 10:36:00,031 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 49 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-05-12 10:36:00,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 352 flow [2024-05-12 10:36:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-05-12 10:36:00,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-05-12 10:36:00,033 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 190 flow. Second operand 4 states and 122 transitions. [2024-05-12 10:36:00,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 352 flow [2024-05-12 10:36:00,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 348 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:36:00,036 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 228 flow [2024-05-12 10:36:00,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-05-12 10:36:00,037 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2024-05-12 10:36:00,037 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 228 flow [2024-05-12 10:36:00,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:00,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:00,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:36:00,038 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 10:36:00,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1650221581, now seen corresponding path program 1 times [2024-05-12 10:36:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:00,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476372432] [2024-05-12 10:36:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:00,333 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 10:36:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476372432] [2024-05-12 10:36:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476372432] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:00,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:00,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393959336] [2024-05-12 10:36:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:00,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:00,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:00,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:00,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 228 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 10:36:00,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:00,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:00,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:00,671 INFO L124 PetriNetUnfolderBase]: 1320/2342 cut-off events. [2024-05-12 10:36:00,672 INFO L125 PetriNetUnfolderBase]: For 2250/2271 co-relation queries the response was YES. [2024-05-12 10:36:00,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6253 conditions, 2342 events. 1320/2342 cut-off events. For 2250/2271 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13965 event pairs, 483 based on Foata normal form. 23/2337 useless extension candidates. Maximal degree in co-relation 6232. Up to 1759 conditions per place. [2024-05-12 10:36:00,685 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 68 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-05-12 10:36:00,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 526 flow [2024-05-12 10:36:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-05-12 10:36:00,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773049645390071 [2024-05-12 10:36:00,688 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 228 flow. Second operand 6 states and 191 transitions. [2024-05-12 10:36:00,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 526 flow [2024-05-12 10:36:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 508 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:00,693 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 290 flow [2024-05-12 10:36:00,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-05-12 10:36:00,695 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-05-12 10:36:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 290 flow [2024-05-12 10:36:00,695 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 10:36:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:36:00,696 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 10:36:00,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 387328442, now seen corresponding path program 1 times [2024-05-12 10:36:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:00,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124548716] [2024-05-12 10:36:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:01,088 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 10:36:01,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:01,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124548716] [2024-05-12 10:36:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124548716] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:01,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:01,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959816165] [2024-05-12 10:36:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:01,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:01,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:01,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:01,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:01,344 INFO L124 PetriNetUnfolderBase]: 1598/2603 cut-off events. [2024-05-12 10:36:01,346 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2024-05-12 10:36:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7816 conditions, 2603 events. 1598/2603 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15192 event pairs, 557 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 7793. Up to 2333 conditions per place. [2024-05-12 10:36:01,364 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 67 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2024-05-12 10:36:01,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 540 flow [2024-05-12 10:36:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 10:36:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-05-12 10:36:01,367 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 290 flow. Second operand 5 states and 144 transitions. [2024-05-12 10:36:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 540 flow [2024-05-12 10:36:01,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 500 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:01,373 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 346 flow [2024-05-12 10:36:01,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-05-12 10:36:01,375 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-05-12 10:36:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 346 flow [2024-05-12 10:36:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:36:01,376 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 10:36:01,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 119438014, now seen corresponding path program 1 times [2024-05-12 10:36:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012723973] [2024-05-12 10:36:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:01,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:01,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012723973] [2024-05-12 10:36:01,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012723973] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:01,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:01,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809076695] [2024-05-12 10:36:01,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:01,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:01,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:01,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:01,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:01,963 INFO L124 PetriNetUnfolderBase]: 1571/2667 cut-off events. [2024-05-12 10:36:01,963 INFO L125 PetriNetUnfolderBase]: For 4928/4960 co-relation queries the response was YES. [2024-05-12 10:36:01,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8347 conditions, 2667 events. 1571/2667 cut-off events. For 4928/4960 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15801 event pairs, 519 based on Foata normal form. 15/2660 useless extension candidates. Maximal degree in co-relation 8321. Up to 2151 conditions per place. [2024-05-12 10:36:01,980 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 68 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-05-12 10:36:01,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 704 flow [2024-05-12 10:36:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 10:36:01,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-05-12 10:36:01,982 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 346 flow. Second operand 5 states and 160 transitions. [2024-05-12 10:36:01,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 704 flow [2024-05-12 10:36:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 698 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-05-12 10:36:01,987 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 498 flow [2024-05-12 10:36:01,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-05-12 10:36:01,988 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2024-05-12 10:36:01,988 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 498 flow [2024-05-12 10:36:01,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:01,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:01,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:36:01,989 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 10:36:01,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 152743174, now seen corresponding path program 2 times [2024-05-12 10:36:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635124447] [2024-05-12 10:36:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:02,242 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 10:36:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:02,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635124447] [2024-05-12 10:36:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635124447] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704145966] [2024-05-12 10:36:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:02,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:02,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:02,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:02,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:02,523 INFO L124 PetriNetUnfolderBase]: 1582/2566 cut-off events. [2024-05-12 10:36:02,524 INFO L125 PetriNetUnfolderBase]: For 7138/7166 co-relation queries the response was YES. [2024-05-12 10:36:02,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9314 conditions, 2566 events. 1582/2566 cut-off events. For 7138/7166 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14860 event pairs, 443 based on Foata normal form. 15/2560 useless extension candidates. Maximal degree in co-relation 9284. Up to 2176 conditions per place. [2024-05-12 10:36:02,542 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 66 selfloop transitions, 24 changer transitions 0/107 dead transitions. [2024-05-12 10:36:02,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 770 flow [2024-05-12 10:36:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-05-12 10:36:02,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-05-12 10:36:02,543 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 498 flow. Second operand 5 states and 155 transitions. [2024-05-12 10:36:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 770 flow [2024-05-12 10:36:02,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 742 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-05-12 10:36:02,555 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 554 flow [2024-05-12 10:36:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-05-12 10:36:02,555 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-05-12 10:36:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 554 flow [2024-05-12 10:36:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:02,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:36:02,556 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 10:36:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1452609733, now seen corresponding path program 1 times [2024-05-12 10:36:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951623231] [2024-05-12 10:36:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:02,824 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 10:36:02,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:02,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951623231] [2024-05-12 10:36:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951623231] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905963549] [2024-05-12 10:36:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:02,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:02,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:02,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:02,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:02,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:03,085 INFO L124 PetriNetUnfolderBase]: 1661/2680 cut-off events. [2024-05-12 10:36:03,085 INFO L125 PetriNetUnfolderBase]: For 7605/7607 co-relation queries the response was YES. [2024-05-12 10:36:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9618 conditions, 2680 events. 1661/2680 cut-off events. For 7605/7607 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15445 event pairs, 499 based on Foata normal form. 2/2677 useless extension candidates. Maximal degree in co-relation 9584. Up to 2341 conditions per place. [2024-05-12 10:36:03,105 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 96 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-05-12 10:36:03,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 970 flow [2024-05-12 10:36:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:36:03,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-05-12 10:36:03,106 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 554 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:36:03,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 970 flow [2024-05-12 10:36:03,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 910 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:03,116 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 646 flow [2024-05-12 10:36:03,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=646, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-05-12 10:36:03,118 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 33 predicate places. [2024-05-12 10:36:03,118 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 646 flow [2024-05-12 10:36:03,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:03,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:03,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:36:03,119 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 10:36:03,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1463453067, now seen corresponding path program 2 times [2024-05-12 10:36:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402626410] [2024-05-12 10:36:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:03,376 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 10:36:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402626410] [2024-05-12 10:36:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402626410] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:03,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:03,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991778588] [2024-05-12 10:36:03,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:03,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:03,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 646 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:03,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:03,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:03,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:03,684 INFO L124 PetriNetUnfolderBase]: 1678/2786 cut-off events. [2024-05-12 10:36:03,684 INFO L125 PetriNetUnfolderBase]: For 9168/9168 co-relation queries the response was YES. [2024-05-12 10:36:03,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10253 conditions, 2786 events. 1678/2786 cut-off events. For 9168/9168 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16493 event pairs, 742 based on Foata normal form. 2/2761 useless extension candidates. Maximal degree in co-relation 10216. Up to 2359 conditions per place. [2024-05-12 10:36:03,702 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 93 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-05-12 10:36:03,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 1013 flow [2024-05-12 10:36:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:36:03,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:36:03,703 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 646 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:36:03,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 1013 flow [2024-05-12 10:36:03,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 981 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:03,716 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 712 flow [2024-05-12 10:36:03,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-05-12 10:36:03,717 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2024-05-12 10:36:03,717 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 712 flow [2024-05-12 10:36:03,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:03,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:03,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:36:03,718 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 10:36:03,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash -584768735, now seen corresponding path program 3 times [2024-05-12 10:36:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:03,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789236179] [2024-05-12 10:36:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:03,968 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 10:36:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:03,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789236179] [2024-05-12 10:36:03,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789236179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:03,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:03,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608487306] [2024-05-12 10:36:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:03,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:03,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:03,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 712 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:03,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:03,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:04,298 INFO L124 PetriNetUnfolderBase]: 1673/2757 cut-off events. [2024-05-12 10:36:04,299 INFO L125 PetriNetUnfolderBase]: For 10161/10161 co-relation queries the response was YES. [2024-05-12 10:36:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 2757 events. 1673/2757 cut-off events. For 10161/10161 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16144 event pairs, 529 based on Foata normal form. 2/2752 useless extension candidates. Maximal degree in co-relation 10308. Up to 2354 conditions per place. [2024-05-12 10:36:04,318 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 90 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-05-12 10:36:04,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1016 flow [2024-05-12 10:36:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:36:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-05-12 10:36:04,320 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 712 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:36:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1016 flow [2024-05-12 10:36:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 978 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:04,334 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 742 flow [2024-05-12 10:36:04,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-05-12 10:36:04,335 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2024-05-12 10:36:04,335 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 742 flow [2024-05-12 10:36:04,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:04,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:36:04,336 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 10:36:04,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1439470823, now seen corresponding path program 1 times [2024-05-12 10:36:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:04,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156146326] [2024-05-12 10:36:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156146326] [2024-05-12 10:36:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156146326] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:04,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:04,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786455794] [2024-05-12 10:36:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:04,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:04,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:04,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:04,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:04,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 742 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:04,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:04,926 INFO L124 PetriNetUnfolderBase]: 1665/2682 cut-off events. [2024-05-12 10:36:04,926 INFO L125 PetriNetUnfolderBase]: For 11195/11195 co-relation queries the response was YES. [2024-05-12 10:36:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10350 conditions, 2682 events. 1665/2682 cut-off events. For 11195/11195 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15452 event pairs, 463 based on Foata normal form. 4/2682 useless extension candidates. Maximal degree in co-relation 10309. Up to 2400 conditions per place. [2024-05-12 10:36:04,945 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 107 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-05-12 10:36:04,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 132 transitions, 1062 flow [2024-05-12 10:36:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:36:04,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:36:04,947 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 742 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:36:04,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 132 transitions, 1062 flow [2024-05-12 10:36:04,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 1022 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:04,962 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 753 flow [2024-05-12 10:36:04,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=753, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-05-12 10:36:04,963 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 45 predicate places. [2024-05-12 10:36:04,963 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 753 flow [2024-05-12 10:36:04,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:04,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:04,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:36:04,964 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 10:36:04,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 496406723, now seen corresponding path program 1 times [2024-05-12 10:36:04,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:04,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630494336] [2024-05-12 10:36:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:04,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:05,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:05,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630494336] [2024-05-12 10:36:05,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630494336] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:05,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:05,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926712179] [2024-05-12 10:36:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:05,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:05,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:05,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:05,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:05,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 753 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:05,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:05,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:05,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:05,617 INFO L124 PetriNetUnfolderBase]: 1625/2720 cut-off events. [2024-05-12 10:36:05,617 INFO L125 PetriNetUnfolderBase]: For 14563/14586 co-relation queries the response was YES. [2024-05-12 10:36:05,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2720 events. 1625/2720 cut-off events. For 14563/14586 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16208 event pairs, 475 based on Foata normal form. 18/2662 useless extension candidates. Maximal degree in co-relation 10730. Up to 2194 conditions per place. [2024-05-12 10:36:05,636 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 80 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-05-12 10:36:05,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 1081 flow [2024-05-12 10:36:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-05-12 10:36:05,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676595744680851 [2024-05-12 10:36:05,637 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 753 flow. Second operand 5 states and 159 transitions. [2024-05-12 10:36:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 1081 flow [2024-05-12 10:36:05,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1048 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:05,654 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 831 flow [2024-05-12 10:36:05,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=831, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-05-12 10:36:05,655 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-05-12 10:36:05,656 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 831 flow [2024-05-12 10:36:05,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:05,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:05,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:05,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:36:05,656 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 10:36:05,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash 365056563, now seen corresponding path program 2 times [2024-05-12 10:36:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:05,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900379858] [2024-05-12 10:36:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:05,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:05,907 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 10:36:05,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:05,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900379858] [2024-05-12 10:36:05,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900379858] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:05,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:05,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632462917] [2024-05-12 10:36:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:05,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:05,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 831 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:05,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:05,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:05,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:06,272 INFO L124 PetriNetUnfolderBase]: 1638/2693 cut-off events. [2024-05-12 10:36:06,272 INFO L125 PetriNetUnfolderBase]: For 17306/17362 co-relation queries the response was YES. [2024-05-12 10:36:06,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11543 conditions, 2693 events. 1638/2693 cut-off events. For 17306/17362 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16006 event pairs, 401 based on Foata normal form. 43/2654 useless extension candidates. Maximal degree in co-relation 11500. Up to 2061 conditions per place. [2024-05-12 10:36:06,293 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 94 selfloop transitions, 53 changer transitions 0/171 dead transitions. [2024-05-12 10:36:06,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 1437 flow [2024-05-12 10:36:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-05-12 10:36:06,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477541371158393 [2024-05-12 10:36:06,295 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 831 flow. Second operand 9 states and 274 transitions. [2024-05-12 10:36:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 1437 flow [2024-05-12 10:36:06,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1358 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:06,317 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 978 flow [2024-05-12 10:36:06,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=978, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-05-12 10:36:06,318 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-05-12 10:36:06,318 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 978 flow [2024-05-12 10:36:06,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:06,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:06,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:36:06,319 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 10:36:06,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 757345381, now seen corresponding path program 3 times [2024-05-12 10:36:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:06,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225246200] [2024-05-12 10:36:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:06,567 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 10:36:06,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225246200] [2024-05-12 10:36:06,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225246200] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:06,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:06,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:06,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979609414] [2024-05-12 10:36:06,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:06,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:06,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:06,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:06,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:06,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:06,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 978 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:06,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:06,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:06,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:06,953 INFO L124 PetriNetUnfolderBase]: 1647/2763 cut-off events. [2024-05-12 10:36:06,953 INFO L125 PetriNetUnfolderBase]: For 19150/19210 co-relation queries the response was YES. [2024-05-12 10:36:06,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12224 conditions, 2763 events. 1647/2763 cut-off events. For 19150/19210 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16718 event pairs, 438 based on Foata normal form. 55/2738 useless extension candidates. Maximal degree in co-relation 12181. Up to 2070 conditions per place. [2024-05-12 10:36:06,976 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-05-12 10:36:06,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1464 flow [2024-05-12 10:36:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-05-12 10:36:06,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-05-12 10:36:06,978 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 978 flow. Second operand 8 states and 244 transitions. [2024-05-12 10:36:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1464 flow [2024-05-12 10:36:07,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1346 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:07,002 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 968 flow [2024-05-12 10:36:07,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=968, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-05-12 10:36:07,003 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-05-12 10:36:07,003 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 968 flow [2024-05-12 10:36:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:07,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:36:07,004 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:07,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 167512980, now seen corresponding path program 1 times [2024-05-12 10:36:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:07,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771684424] [2024-05-12 10:36:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771684424] [2024-05-12 10:36:07,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771684424] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:07,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:07,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333830448] [2024-05-12 10:36:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:07,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:07,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:07,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:07,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:07,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:07,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:07,570 INFO L124 PetriNetUnfolderBase]: 1642/2693 cut-off events. [2024-05-12 10:36:07,571 INFO L125 PetriNetUnfolderBase]: For 16857/16864 co-relation queries the response was YES. [2024-05-12 10:36:07,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11786 conditions, 2693 events. 1642/2693 cut-off events. For 16857/16864 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15945 event pairs, 412 based on Foata normal form. 9/2693 useless extension candidates. Maximal degree in co-relation 11741. Up to 2249 conditions per place. [2024-05-12 10:36:07,590 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 89 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-05-12 10:36:07,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 132 transitions, 1216 flow [2024-05-12 10:36:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-05-12 10:36:07,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-05-12 10:36:07,592 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 968 flow. Second operand 4 states and 121 transitions. [2024-05-12 10:36:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 132 transitions, 1216 flow [2024-05-12 10:36:07,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1111 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:07,611 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 910 flow [2024-05-12 10:36:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=910, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-05-12 10:36:07,613 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-05-12 10:36:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 910 flow [2024-05-12 10:36:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:36:07,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash 180361404, now seen corresponding path program 1 times [2024-05-12 10:36:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:07,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063225191] [2024-05-12 10:36:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:07,871 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 10:36:07,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:07,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063225191] [2024-05-12 10:36:07,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063225191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:07,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:07,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882648524] [2024-05-12 10:36:07,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:07,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:07,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:07,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 910 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:07,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:07,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:07,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:08,211 INFO L124 PetriNetUnfolderBase]: 1740/2794 cut-off events. [2024-05-12 10:36:08,212 INFO L125 PetriNetUnfolderBase]: For 17776/17776 co-relation queries the response was YES. [2024-05-12 10:36:08,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12163 conditions, 2794 events. 1740/2794 cut-off events. For 17776/17776 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16119 event pairs, 423 based on Foata normal form. 2/2792 useless extension candidates. Maximal degree in co-relation 12118. Up to 2488 conditions per place. [2024-05-12 10:36:08,260 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 138 selfloop transitions, 16 changer transitions 0/167 dead transitions. [2024-05-12 10:36:08,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 167 transitions, 1378 flow [2024-05-12 10:36:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:36:08,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139817629179332 [2024-05-12 10:36:08,262 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 910 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:36:08,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 167 transitions, 1378 flow [2024-05-12 10:36:08,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1330 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:08,281 INFO L231 Difference]: Finished difference. Result has 110 places, 128 transitions, 990 flow [2024-05-12 10:36:08,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=990, PETRI_PLACES=110, PETRI_TRANSITIONS=128} [2024-05-12 10:36:08,282 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-05-12 10:36:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 128 transitions, 990 flow [2024-05-12 10:36:08,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:08,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:08,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:36:08,283 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 10:36:08,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1643649604, now seen corresponding path program 2 times [2024-05-12 10:36:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000170569] [2024-05-12 10:36:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:08,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000170569] [2024-05-12 10:36:08,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000170569] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:08,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:08,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198815270] [2024-05-12 10:36:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:08,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:08,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:08,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:08,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 128 transitions, 990 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:08,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:08,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:08,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:08,959 INFO L124 PetriNetUnfolderBase]: 1779/2871 cut-off events. [2024-05-12 10:36:08,959 INFO L125 PetriNetUnfolderBase]: For 20455/20457 co-relation queries the response was YES. [2024-05-12 10:36:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12976 conditions, 2871 events. 1779/2871 cut-off events. For 20455/20457 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16696 event pairs, 435 based on Foata normal form. 2/2868 useless extension candidates. Maximal degree in co-relation 12929. Up to 2369 conditions per place. [2024-05-12 10:36:08,980 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 139 selfloop transitions, 44 changer transitions 0/196 dead transitions. [2024-05-12 10:36:08,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 196 transitions, 1702 flow [2024-05-12 10:36:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-05-12 10:36:08,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:36:08,982 INFO L175 Difference]: Start difference. First operand has 110 places, 128 transitions, 990 flow. Second operand 9 states and 267 transitions. [2024-05-12 10:36:08,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 196 transitions, 1702 flow [2024-05-12 10:36:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1656 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:09,011 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1165 flow [2024-05-12 10:36:09,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1165, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-05-12 10:36:09,012 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-05-12 10:36:09,012 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1165 flow [2024-05-12 10:36:09,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:09,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:09,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:36:09,013 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 10:36:09,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1712031818, now seen corresponding path program 3 times [2024-05-12 10:36:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:09,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592149273] [2024-05-12 10:36:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592149273] [2024-05-12 10:36:09,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592149273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:09,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:09,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142972482] [2024-05-12 10:36:09,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:09,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:09,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1165 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:09,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:09,712 INFO L124 PetriNetUnfolderBase]: 1774/3030 cut-off events. [2024-05-12 10:36:09,712 INFO L125 PetriNetUnfolderBase]: For 23690/23692 co-relation queries the response was YES. [2024-05-12 10:36:09,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13821 conditions, 3030 events. 1774/3030 cut-off events. For 23690/23692 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18263 event pairs, 555 based on Foata normal form. 2/3026 useless extension candidates. Maximal degree in co-relation 13771. Up to 2364 conditions per place. [2024-05-12 10:36:09,733 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 141 selfloop transitions, 47 changer transitions 0/201 dead transitions. [2024-05-12 10:36:09,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 201 transitions, 1759 flow [2024-05-12 10:36:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 288 transitions. [2024-05-12 10:36:09,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-05-12 10:36:09,735 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1165 flow. Second operand 10 states and 288 transitions. [2024-05-12 10:36:09,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 201 transitions, 1759 flow [2024-05-12 10:36:09,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 201 transitions, 1675 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:09,769 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1194 flow [2024-05-12 10:36:09,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1194, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2024-05-12 10:36:09,769 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-05-12 10:36:09,769 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1194 flow [2024-05-12 10:36:09,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:09,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:09,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:36:09,770 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 10:36:09,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1567931542, now seen corresponding path program 1 times [2024-05-12 10:36:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:09,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393781472] [2024-05-12 10:36:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393781472] [2024-05-12 10:36:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393781472] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:10,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440402310] [2024-05-12 10:36:10,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:10,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:10,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:10,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:10,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:10,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:10,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:10,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:10,392 INFO L124 PetriNetUnfolderBase]: 1801/3031 cut-off events. [2024-05-12 10:36:10,392 INFO L125 PetriNetUnfolderBase]: For 25477/25479 co-relation queries the response was YES. [2024-05-12 10:36:10,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14095 conditions, 3031 events. 1801/3031 cut-off events. For 25477/25479 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18004 event pairs, 525 based on Foata normal form. 4/3026 useless extension candidates. Maximal degree in co-relation 14043. Up to 2505 conditions per place. [2024-05-12 10:36:10,415 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 140 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-05-12 10:36:10,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 180 transitions, 1630 flow [2024-05-12 10:36:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:36:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:36:10,422 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1194 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:36:10,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 180 transitions, 1630 flow [2024-05-12 10:36:10,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1546 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:10,459 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1189 flow [2024-05-12 10:36:10,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-05-12 10:36:10,460 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-05-12 10:36:10,460 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1189 flow [2024-05-12 10:36:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:10,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:10,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:36:10,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2035387498, now seen corresponding path program 4 times [2024-05-12 10:36:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:10,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796628830] [2024-05-12 10:36:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796628830] [2024-05-12 10:36:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796628830] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:10,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:10,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:10,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276614647] [2024-05-12 10:36:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:10,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:10,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:10,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:10,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:10,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:11,155 INFO L124 PetriNetUnfolderBase]: 1818/3021 cut-off events. [2024-05-12 10:36:11,155 INFO L125 PetriNetUnfolderBase]: For 27049/27049 co-relation queries the response was YES. [2024-05-12 10:36:11,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14392 conditions, 3021 events. 1818/3021 cut-off events. For 27049/27049 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18146 event pairs, 668 based on Foata normal form. 2/2998 useless extension candidates. Maximal degree in co-relation 14339. Up to 2423 conditions per place. [2024-05-12 10:36:11,177 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 138 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-05-12 10:36:11,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 204 transitions, 1818 flow [2024-05-12 10:36:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-05-12 10:36:11,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:36:11,179 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1189 flow. Second operand 10 states and 282 transitions. [2024-05-12 10:36:11,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 204 transitions, 1818 flow [2024-05-12 10:36:11,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 1757 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:11,219 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1301 flow [2024-05-12 10:36:11,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1301, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-05-12 10:36:11,219 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-05-12 10:36:11,219 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1301 flow [2024-05-12 10:36:11,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:11,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:11,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:11,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:36:11,220 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 10:36:11,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash 421302352, now seen corresponding path program 5 times [2024-05-12 10:36:11,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:11,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707290262] [2024-05-12 10:36:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:11,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:11,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:11,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707290262] [2024-05-12 10:36:11,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707290262] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:11,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:11,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611122718] [2024-05-12 10:36:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:11,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:11,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:11,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:11,908 INFO L124 PetriNetUnfolderBase]: 1835/3052 cut-off events. [2024-05-12 10:36:11,908 INFO L125 PetriNetUnfolderBase]: For 29519/29519 co-relation queries the response was YES. [2024-05-12 10:36:11,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14858 conditions, 3052 events. 1835/3052 cut-off events. For 29519/29519 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18484 event pairs, 668 based on Foata normal form. 2/3029 useless extension candidates. Maximal degree in co-relation 14803. Up to 2441 conditions per place. [2024-05-12 10:36:11,931 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 147 selfloop transitions, 53 changer transitions 0/213 dead transitions. [2024-05-12 10:36:11,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 213 transitions, 1958 flow [2024-05-12 10:36:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 311 transitions. [2024-05-12 10:36:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015473887814313 [2024-05-12 10:36:11,935 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1301 flow. Second operand 11 states and 311 transitions. [2024-05-12 10:36:11,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 213 transitions, 1958 flow [2024-05-12 10:36:11,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 213 transitions, 1856 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:11,981 INFO L231 Difference]: Finished difference. Result has 135 places, 151 transitions, 1350 flow [2024-05-12 10:36:11,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1350, PETRI_PLACES=135, PETRI_TRANSITIONS=151} [2024-05-12 10:36:11,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2024-05-12 10:36:11,981 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 151 transitions, 1350 flow [2024-05-12 10:36:11,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:11,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:11,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:11,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:36:11,983 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 10:36:11,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash 421296772, now seen corresponding path program 6 times [2024-05-12 10:36:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:11,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047286733] [2024-05-12 10:36:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:11,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:12,209 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 10:36:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047286733] [2024-05-12 10:36:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047286733] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:12,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:12,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748263996] [2024-05-12 10:36:12,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:12,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:12,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:12,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 151 transitions, 1350 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:12,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:12,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:12,594 INFO L124 PetriNetUnfolderBase]: 1830/3123 cut-off events. [2024-05-12 10:36:12,595 INFO L125 PetriNetUnfolderBase]: For 31627/31627 co-relation queries the response was YES. [2024-05-12 10:36:12,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14948 conditions, 3123 events. 1830/3123 cut-off events. For 31627/31627 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18885 event pairs, 553 based on Foata normal form. 2/3119 useless extension candidates. Maximal degree in co-relation 14892. Up to 2436 conditions per place. [2024-05-12 10:36:12,617 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 134 selfloop transitions, 52 changer transitions 0/199 dead transitions. [2024-05-12 10:36:12,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 199 transitions, 1836 flow [2024-05-12 10:36:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-05-12 10:36:12,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2024-05-12 10:36:12,619 INFO L175 Difference]: Start difference. First operand has 135 places, 151 transitions, 1350 flow. Second operand 9 states and 257 transitions. [2024-05-12 10:36:12,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 199 transitions, 1836 flow [2024-05-12 10:36:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 199 transitions, 1670 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-05-12 10:36:12,659 INFO L231 Difference]: Finished difference. Result has 134 places, 151 transitions, 1296 flow [2024-05-12 10:36:12,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1296, PETRI_PLACES=134, PETRI_TRANSITIONS=151} [2024-05-12 10:36:12,659 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-05-12 10:36:12,660 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 151 transitions, 1296 flow [2024-05-12 10:36:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:36:12,660 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 10:36:12,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash 421512098, now seen corresponding path program 2 times [2024-05-12 10:36:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619391118] [2024-05-12 10:36:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619391118] [2024-05-12 10:36:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619391118] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041470906] [2024-05-12 10:36:12,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:12,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:12,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:12,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 151 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:12,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:12,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,266 INFO L124 PetriNetUnfolderBase]: 1857/2990 cut-off events. [2024-05-12 10:36:13,267 INFO L125 PetriNetUnfolderBase]: For 33368/33368 co-relation queries the response was YES. [2024-05-12 10:36:13,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14879 conditions, 2990 events. 1857/2990 cut-off events. For 33368/33368 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17443 event pairs, 430 based on Foata normal form. 4/2988 useless extension candidates. Maximal degree in co-relation 14823. Up to 2587 conditions per place. [2024-05-12 10:36:13,288 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 147 selfloop transitions, 27 changer transitions 0/187 dead transitions. [2024-05-12 10:36:13,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 187 transitions, 1742 flow [2024-05-12 10:36:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:36:13,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:36:13,289 INFO L175 Difference]: Start difference. First operand has 134 places, 151 transitions, 1296 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:36:13,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 187 transitions, 1742 flow [2024-05-12 10:36:13,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 187 transitions, 1638 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:13,327 INFO L231 Difference]: Finished difference. Result has 133 places, 153 transitions, 1275 flow [2024-05-12 10:36:13,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1275, PETRI_PLACES=133, PETRI_TRANSITIONS=153} [2024-05-12 10:36:13,328 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-05-12 10:36:13,328 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 153 transitions, 1275 flow [2024-05-12 10:36:13,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:13,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:36:13,329 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:13,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 678012608, now seen corresponding path program 3 times [2024-05-12 10:36:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:13,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807318774] [2024-05-12 10:36:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807318774] [2024-05-12 10:36:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807318774] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:13,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227633338] [2024-05-12 10:36:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 153 transitions, 1275 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,979 INFO L124 PetriNetUnfolderBase]: 1884/3144 cut-off events. [2024-05-12 10:36:13,979 INFO L125 PetriNetUnfolderBase]: For 36697/36697 co-relation queries the response was YES. [2024-05-12 10:36:13,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15336 conditions, 3144 events. 1884/3144 cut-off events. For 36697/36697 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19122 event pairs, 703 based on Foata normal form. 4/3122 useless extension candidates. Maximal degree in co-relation 15279. Up to 2628 conditions per place. [2024-05-12 10:36:14,003 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 148 selfloop transitions, 28 changer transitions 0/189 dead transitions. [2024-05-12 10:36:14,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 189 transitions, 1729 flow [2024-05-12 10:36:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:36:14,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048632218844985 [2024-05-12 10:36:14,005 INFO L175 Difference]: Start difference. First operand has 133 places, 153 transitions, 1275 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:36:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 189 transitions, 1729 flow [2024-05-12 10:36:14,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1664 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:14,046 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 1299 flow [2024-05-12 10:36:14,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1299, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2024-05-12 10:36:14,046 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2024-05-12 10:36:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 1299 flow [2024-05-12 10:36:14,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:14,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:14,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:36:14,047 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 10:36:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash -361204774, now seen corresponding path program 4 times [2024-05-12 10:36:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:14,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890901518] [2024-05-12 10:36:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:14,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:14,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890901518] [2024-05-12 10:36:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890901518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238789520] [2024-05-12 10:36:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:14,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:14,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 1299 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:14,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:14,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:14,705 INFO L124 PetriNetUnfolderBase]: 1876/3058 cut-off events. [2024-05-12 10:36:14,705 INFO L125 PetriNetUnfolderBase]: For 39051/39051 co-relation queries the response was YES. [2024-05-12 10:36:14,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15358 conditions, 3058 events. 1876/3058 cut-off events. For 39051/39051 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18169 event pairs, 577 based on Foata normal form. 4/3045 useless extension candidates. Maximal degree in co-relation 15300. Up to 2505 conditions per place. [2024-05-12 10:36:14,728 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 144 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2024-05-12 10:36:14,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 1765 flow [2024-05-12 10:36:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:36:14,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:36:14,729 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 1299 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:36:14,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 1765 flow [2024-05-12 10:36:14,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 1694 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:14,774 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1335 flow [2024-05-12 10:36:14,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-05-12 10:36:14,775 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-05-12 10:36:14,775 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1335 flow [2024-05-12 10:36:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:14,775 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 10:36:14,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:36:14,775 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 10:36:14,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -105015406, now seen corresponding path program 1 times [2024-05-12 10:36:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144737680] [2024-05-12 10:36:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:15,039 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 10:36:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144737680] [2024-05-12 10:36:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144737680] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:15,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618426742] [2024-05-12 10:36:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:15,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:15,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:15,506 INFO L124 PetriNetUnfolderBase]: 2077/3503 cut-off events. [2024-05-12 10:36:15,507 INFO L125 PetriNetUnfolderBase]: For 56049/56103 co-relation queries the response was YES. [2024-05-12 10:36:15,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 3503 events. 2077/3503 cut-off events. For 56049/56103 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21519 event pairs, 319 based on Foata normal form. 24/3446 useless extension candidates. Maximal degree in co-relation 17896. Up to 2387 conditions per place. [2024-05-12 10:36:15,533 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 130 selfloop transitions, 42 changer transitions 0/210 dead transitions. [2024-05-12 10:36:15,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 210 transitions, 2003 flow [2024-05-12 10:36:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-05-12 10:36:15,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6778115501519757 [2024-05-12 10:36:15,534 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1335 flow. Second operand 7 states and 223 transitions. [2024-05-12 10:36:15,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 210 transitions, 2003 flow [2024-05-12 10:36:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 1914 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:15,586 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1449 flow [2024-05-12 10:36:15,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1449, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-05-12 10:36:15,587 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-05-12 10:36:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1449 flow [2024-05-12 10:36:15,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:15,587 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 10:36:15,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:36:15,588 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 10:36:15,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 305536162, now seen corresponding path program 2 times [2024-05-12 10:36:15,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:15,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112520560] [2024-05-12 10:36:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:15,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:15,873 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 10:36:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112520560] [2024-05-12 10:36:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112520560] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:15,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150360116] [2024-05-12 10:36:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:15,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:15,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:15,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:15,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:16,307 INFO L124 PetriNetUnfolderBase]: 2079/3538 cut-off events. [2024-05-12 10:36:16,307 INFO L125 PetriNetUnfolderBase]: For 58194/58241 co-relation queries the response was YES. [2024-05-12 10:36:16,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18429 conditions, 3538 events. 2079/3538 cut-off events. For 58194/58241 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22352 event pairs, 641 based on Foata normal form. 18/3452 useless extension candidates. Maximal degree in co-relation 18368. Up to 2705 conditions per place. [2024-05-12 10:36:16,333 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 125 selfloop transitions, 36 changer transitions 0/199 dead transitions. [2024-05-12 10:36:16,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 199 transitions, 1886 flow [2024-05-12 10:36:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-05-12 10:36:16,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-05-12 10:36:16,335 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1449 flow. Second operand 6 states and 189 transitions. [2024-05-12 10:36:16,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 199 transitions, 1886 flow [2024-05-12 10:36:16,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 199 transitions, 1834 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:16,386 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1499 flow [2024-05-12 10:36:16,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1499, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-05-12 10:36:16,386 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-05-12 10:36:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1499 flow [2024-05-12 10:36:16,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:16,387 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 10:36:16,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:36:16,387 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 10:36:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash 586466466, now seen corresponding path program 3 times [2024-05-12 10:36:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:16,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253689436] [2024-05-12 10:36:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:16,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:16,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253689436] [2024-05-12 10:36:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253689436] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:16,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593760128] [2024-05-12 10:36:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:16,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1499 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:17,143 INFO L124 PetriNetUnfolderBase]: 2123/3454 cut-off events. [2024-05-12 10:36:17,143 INFO L125 PetriNetUnfolderBase]: For 60761/60808 co-relation queries the response was YES. [2024-05-12 10:36:17,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18890 conditions, 3454 events. 2123/3454 cut-off events. For 60761/60808 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21084 event pairs, 397 based on Foata normal form. 14/3368 useless extension candidates. Maximal degree in co-relation 18827. Up to 2631 conditions per place. [2024-05-12 10:36:17,169 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 126 selfloop transitions, 63 changer transitions 0/227 dead transitions. [2024-05-12 10:36:17,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 227 transitions, 2169 flow [2024-05-12 10:36:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 302 transitions. [2024-05-12 10:36:17,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6425531914893617 [2024-05-12 10:36:17,170 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1499 flow. Second operand 10 states and 302 transitions. [2024-05-12 10:36:17,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 227 transitions, 2169 flow [2024-05-12 10:36:17,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 227 transitions, 2094 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:17,240 INFO L231 Difference]: Finished difference. Result has 149 places, 167 transitions, 1593 flow [2024-05-12 10:36:17,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1593, PETRI_PLACES=149, PETRI_TRANSITIONS=167} [2024-05-12 10:36:17,240 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2024-05-12 10:36:17,241 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 167 transitions, 1593 flow [2024-05-12 10:36:17,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:17,241 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 10:36:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:36:17,241 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:17,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash -487794990, now seen corresponding path program 4 times [2024-05-12 10:36:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633959840] [2024-05-12 10:36:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:17,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633959840] [2024-05-12 10:36:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633959840] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:17,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13520273] [2024-05-12 10:36:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:17,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:17,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:17,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 167 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:17,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:17,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:18,027 INFO L124 PetriNetUnfolderBase]: 2175/3519 cut-off events. [2024-05-12 10:36:18,027 INFO L125 PetriNetUnfolderBase]: For 63924/63971 co-relation queries the response was YES. [2024-05-12 10:36:18,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19593 conditions, 3519 events. 2175/3519 cut-off events. For 63924/63971 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21536 event pairs, 406 based on Foata normal form. 14/3432 useless extension candidates. Maximal degree in co-relation 19529. Up to 2712 conditions per place. [2024-05-12 10:36:18,052 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 126 selfloop transitions, 59 changer transitions 0/223 dead transitions. [2024-05-12 10:36:18,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 223 transitions, 2249 flow [2024-05-12 10:36:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-05-12 10:36:18,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430260047281324 [2024-05-12 10:36:18,053 INFO L175 Difference]: Start difference. First operand has 149 places, 167 transitions, 1593 flow. Second operand 9 states and 272 transitions. [2024-05-12 10:36:18,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 223 transitions, 2249 flow [2024-05-12 10:36:18,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 2114 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:18,135 INFO L231 Difference]: Finished difference. Result has 150 places, 169 transitions, 1623 flow [2024-05-12 10:36:18,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1623, PETRI_PLACES=150, PETRI_TRANSITIONS=169} [2024-05-12 10:36:18,136 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-05-12 10:36:18,136 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 169 transitions, 1623 flow [2024-05-12 10:36:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:18,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:18,136 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 10:36:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:36:18,136 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 10:36:18,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2031292473, now seen corresponding path program 1 times [2024-05-12 10:36:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:18,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402967708] [2024-05-12 10:36:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402967708] [2024-05-12 10:36:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402967708] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:18,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:18,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:18,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278445434] [2024-05-12 10:36:18,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:18,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:18,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:18,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:18,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 169 transitions, 1623 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 10:36:18,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:18,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:18,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:18,786 INFO L124 PetriNetUnfolderBase]: 2337/3859 cut-off events. [2024-05-12 10:36:18,787 INFO L125 PetriNetUnfolderBase]: For 58592/58592 co-relation queries the response was YES. [2024-05-12 10:36:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20578 conditions, 3859 events. 2337/3859 cut-off events. For 58592/58592 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24082 event pairs, 855 based on Foata normal form. 1/3831 useless extension candidates. Maximal degree in co-relation 20513. Up to 3382 conditions per place. [2024-05-12 10:36:18,867 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 167 selfloop transitions, 20 changer transitions 0/200 dead transitions. [2024-05-12 10:36:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 200 transitions, 2203 flow [2024-05-12 10:36:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:36:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:36:18,868 INFO L175 Difference]: Start difference. First operand has 150 places, 169 transitions, 1623 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:36:18,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 200 transitions, 2203 flow [2024-05-12 10:36:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 200 transitions, 2072 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:18,946 INFO L231 Difference]: Finished difference. Result has 149 places, 175 transitions, 1636 flow [2024-05-12 10:36:18,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1636, PETRI_PLACES=149, PETRI_TRANSITIONS=175} [2024-05-12 10:36:18,946 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2024-05-12 10:36:18,946 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 175 transitions, 1636 flow [2024-05-12 10:36:18,946 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 10:36:18,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:18,947 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 10:36:18,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:36:18,947 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:18,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2031412629, now seen corresponding path program 1 times [2024-05-12 10:36:18,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:18,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977666583] [2024-05-12 10:36:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:19,203 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 10:36:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:19,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977666583] [2024-05-12 10:36:19,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977666583] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:19,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:19,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029704079] [2024-05-12 10:36:19,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:19,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:19,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:19,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 175 transitions, 1636 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 10:36:19,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:19,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:19,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:19,613 INFO L124 PetriNetUnfolderBase]: 2403/3966 cut-off events. [2024-05-12 10:36:19,614 INFO L125 PetriNetUnfolderBase]: For 61364/61364 co-relation queries the response was YES. [2024-05-12 10:36:19,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20880 conditions, 3966 events. 2403/3966 cut-off events. For 61364/61364 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24857 event pairs, 557 based on Foata normal form. 2/3955 useless extension candidates. Maximal degree in co-relation 20814. Up to 3320 conditions per place. [2024-05-12 10:36:19,647 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 156 selfloop transitions, 42 changer transitions 0/211 dead transitions. [2024-05-12 10:36:19,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 211 transitions, 2268 flow [2024-05-12 10:36:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:36:19,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-05-12 10:36:19,648 INFO L175 Difference]: Start difference. First operand has 149 places, 175 transitions, 1636 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:36:19,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 211 transitions, 2268 flow [2024-05-12 10:36:19,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2202 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:19,753 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 1800 flow [2024-05-12 10:36:19,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1800, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-05-12 10:36:19,753 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-05-12 10:36:19,753 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 1800 flow [2024-05-12 10:36:19,754 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 10:36:19,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:19,754 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 10:36:19,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:36:19,754 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:19,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2031412443, now seen corresponding path program 2 times [2024-05-12 10:36:19,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:19,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634143846] [2024-05-12 10:36:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:19,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:20,051 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 10:36:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634143846] [2024-05-12 10:36:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634143846] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:20,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496898482] [2024-05-12 10:36:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:20,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:20,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 1800 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 10:36:20,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:20,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:20,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:20,520 INFO L124 PetriNetUnfolderBase]: 2414/3868 cut-off events. [2024-05-12 10:36:20,521 INFO L125 PetriNetUnfolderBase]: For 63233/63233 co-relation queries the response was YES. [2024-05-12 10:36:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21193 conditions, 3868 events. 2414/3868 cut-off events. For 63233/63233 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23472 event pairs, 459 based on Foata normal form. 1/3867 useless extension candidates. Maximal degree in co-relation 21124. Up to 3505 conditions per place. [2024-05-12 10:36:20,554 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 182 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2024-05-12 10:36:20,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 213 transitions, 2302 flow [2024-05-12 10:36:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:36:20,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:36:20,555 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 1800 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:36:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 213 transitions, 2302 flow [2024-05-12 10:36:20,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2245 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:20,666 INFO L231 Difference]: Finished difference. Result has 158 places, 192 transitions, 1845 flow [2024-05-12 10:36:20,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1845, PETRI_PLACES=158, PETRI_TRANSITIONS=192} [2024-05-12 10:36:20,666 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 107 predicate places. [2024-05-12 10:36:20,667 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 192 transitions, 1845 flow [2024-05-12 10:36:20,667 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 10:36:20,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:20,667 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 10:36:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:36:20,667 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 10:36:20,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1571634667, now seen corresponding path program 2 times [2024-05-12 10:36:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:20,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575418805] [2024-05-12 10:36:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:20,903 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 10:36:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:20,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575418805] [2024-05-12 10:36:20,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575418805] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:20,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31278264] [2024-05-12 10:36:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:20,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:20,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 192 transitions, 1845 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 10:36:20,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:20,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:20,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:21,346 INFO L124 PetriNetUnfolderBase]: 2436/4024 cut-off events. [2024-05-12 10:36:21,347 INFO L125 PetriNetUnfolderBase]: For 67713/67713 co-relation queries the response was YES. [2024-05-12 10:36:21,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21446 conditions, 4024 events. 2436/4024 cut-off events. For 67713/67713 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25302 event pairs, 563 based on Foata normal form. 2/4011 useless extension candidates. Maximal degree in co-relation 21376. Up to 3355 conditions per place. [2024-05-12 10:36:21,381 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 156 selfloop transitions, 46 changer transitions 0/215 dead transitions. [2024-05-12 10:36:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 215 transitions, 2397 flow [2024-05-12 10:36:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 10:36:21,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-05-12 10:36:21,383 INFO L175 Difference]: Start difference. First operand has 158 places, 192 transitions, 1845 flow. Second operand 5 states and 148 transitions. [2024-05-12 10:36:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 215 transitions, 2397 flow [2024-05-12 10:36:21,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 215 transitions, 2331 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:21,470 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 1931 flow [2024-05-12 10:36:21,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1931, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-05-12 10:36:21,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-05-12 10:36:21,471 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 1931 flow [2024-05-12 10:36:21,471 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 10:36:21,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:21,471 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 10:36:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:36:21,472 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 10:36:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2042979679, now seen corresponding path program 3 times [2024-05-12 10:36:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753629370] [2024-05-12 10:36:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:21,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753629370] [2024-05-12 10:36:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753629370] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22282012] [2024-05-12 10:36:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:21,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:21,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 1931 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 10:36:21,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:21,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:21,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:22,139 INFO L124 PetriNetUnfolderBase]: 2416/3902 cut-off events. [2024-05-12 10:36:22,139 INFO L125 PetriNetUnfolderBase]: For 69850/69852 co-relation queries the response was YES. [2024-05-12 10:36:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21407 conditions, 3902 events. 2416/3902 cut-off events. For 69850/69852 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24105 event pairs, 517 based on Foata normal form. 4/3892 useless extension candidates. Maximal degree in co-relation 21336. Up to 3326 conditions per place. [2024-05-12 10:36:22,172 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 152 selfloop transitions, 46 changer transitions 0/211 dead transitions. [2024-05-12 10:36:22,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 2361 flow [2024-05-12 10:36:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 10:36:22,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-05-12 10:36:22,173 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 1931 flow. Second operand 5 states and 144 transitions. [2024-05-12 10:36:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 2361 flow [2024-05-12 10:36:22,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 211 transitions, 2301 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:22,282 INFO L231 Difference]: Finished difference. Result has 163 places, 196 transitions, 1970 flow [2024-05-12 10:36:22,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1970, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2024-05-12 10:36:22,283 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-05-12 10:36:22,283 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1970 flow [2024-05-12 10:36:22,283 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 10:36:22,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:22,283 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 10:36:22,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:36:22,284 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 10:36:22,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1571634853, now seen corresponding path program 3 times [2024-05-12 10:36:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:22,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078717418] [2024-05-12 10:36:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:22,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:22,536 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 10:36:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078717418] [2024-05-12 10:36:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078717418] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:22,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158157213] [2024-05-12 10:36:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:22,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:22,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1970 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 10:36:22,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:22,983 INFO L124 PetriNetUnfolderBase]: 2413/3972 cut-off events. [2024-05-12 10:36:22,983 INFO L125 PetriNetUnfolderBase]: For 68742/68742 co-relation queries the response was YES. [2024-05-12 10:36:23,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 3972 events. 2413/3972 cut-off events. For 68742/68742 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24851 event pairs, 861 based on Foata normal form. 1/3944 useless extension candidates. Maximal degree in co-relation 21397. Up to 3479 conditions per place. [2024-05-12 10:36:23,036 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 181 selfloop transitions, 23 changer transitions 0/217 dead transitions. [2024-05-12 10:36:23,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 217 transitions, 2428 flow [2024-05-12 10:36:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-05-12 10:36:23,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212765957446809 [2024-05-12 10:36:23,038 INFO L175 Difference]: Start difference. First operand has 163 places, 196 transitions, 1970 flow. Second operand 5 states and 146 transitions. [2024-05-12 10:36:23,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 217 transitions, 2428 flow [2024-05-12 10:36:23,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 217 transitions, 2238 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:23,153 INFO L231 Difference]: Finished difference. Result has 163 places, 196 transitions, 1840 flow [2024-05-12 10:36:23,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1840, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2024-05-12 10:36:23,153 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-05-12 10:36:23,153 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1840 flow [2024-05-12 10:36:23,154 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 10:36:23,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:23,154 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 10:36:23,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:36:23,154 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 10:36:23,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2042988607, now seen corresponding path program 1 times [2024-05-12 10:36:23,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:23,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36448597] [2024-05-12 10:36:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:23,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36448597] [2024-05-12 10:36:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36448597] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223474818] [2024-05-12 10:36:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:23,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:36:23,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1840 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:23,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:36:23,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:23,848 INFO L124 PetriNetUnfolderBase]: 2379/3941 cut-off events. [2024-05-12 10:36:23,848 INFO L125 PetriNetUnfolderBase]: For 74960/74988 co-relation queries the response was YES. [2024-05-12 10:36:23,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20931 conditions, 3941 events. 2379/3941 cut-off events. For 74960/74988 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25056 event pairs, 847 based on Foata normal form. 36/3935 useless extension candidates. Maximal degree in co-relation 20859. Up to 3161 conditions per place. [2024-05-12 10:36:23,884 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 159 selfloop transitions, 22 changer transitions 0/217 dead transitions. [2024-05-12 10:36:23,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 217 transitions, 2288 flow [2024-05-12 10:36:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 10:36:23,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-05-12 10:36:23,885 INFO L175 Difference]: Start difference. First operand has 163 places, 196 transitions, 1840 flow. Second operand 5 states and 148 transitions. [2024-05-12 10:36:23,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 217 transitions, 2288 flow [2024-05-12 10:36:24,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 217 transitions, 2240 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:24,003 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 1873 flow [2024-05-12 10:36:24,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1873, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-05-12 10:36:24,003 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-05-12 10:36:24,004 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 1873 flow [2024-05-12 10:36:24,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:24,004 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 10:36:24,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:36:24,004 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:24,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1681769651, now seen corresponding path program 1 times [2024-05-12 10:36:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300138537] [2024-05-12 10:36:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:24,240 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 10:36:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300138537] [2024-05-12 10:36:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300138537] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:24,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985721196] [2024-05-12 10:36:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:24,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:24,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 1873 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:24,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:24,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:24,893 INFO L124 PetriNetUnfolderBase]: 2679/4370 cut-off events. [2024-05-12 10:36:24,894 INFO L125 PetriNetUnfolderBase]: For 84412/84412 co-relation queries the response was YES. [2024-05-12 10:36:24,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23781 conditions, 4370 events. 2679/4370 cut-off events. For 84412/84412 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27538 event pairs, 745 based on Foata normal form. 12/4350 useless extension candidates. Maximal degree in co-relation 23708. Up to 3516 conditions per place. [2024-05-12 10:36:24,930 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 232 selfloop transitions, 20 changer transitions 0/265 dead transitions. [2024-05-12 10:36:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 265 transitions, 2751 flow [2024-05-12 10:36:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-05-12 10:36:24,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193853427895981 [2024-05-12 10:36:24,931 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 1873 flow. Second operand 9 states and 262 transitions. [2024-05-12 10:36:24,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 265 transitions, 2751 flow [2024-05-12 10:36:25,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 265 transitions, 2692 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:25,118 INFO L231 Difference]: Finished difference. Result has 172 places, 203 transitions, 1944 flow [2024-05-12 10:36:25,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1944, PETRI_PLACES=172, PETRI_TRANSITIONS=203} [2024-05-12 10:36:25,119 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-05-12 10:36:25,119 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 203 transitions, 1944 flow [2024-05-12 10:36:25,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:25,119 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 10:36:25,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:36:25,119 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:25,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1082644575, now seen corresponding path program 2 times [2024-05-12 10:36:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:25,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609171803] [2024-05-12 10:36:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:25,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:25,382 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 10:36:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609171803] [2024-05-12 10:36:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609171803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:25,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:25,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659687965] [2024-05-12 10:36:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:25,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:25,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:25,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 203 transitions, 1944 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:25,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:25,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:25,954 INFO L124 PetriNetUnfolderBase]: 2738/4385 cut-off events. [2024-05-12 10:36:25,954 INFO L125 PetriNetUnfolderBase]: For 88884/88884 co-relation queries the response was YES. [2024-05-12 10:36:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24267 conditions, 4385 events. 2738/4385 cut-off events. For 88884/88884 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27370 event pairs, 502 based on Foata normal form. 16/4397 useless extension candidates. Maximal degree in co-relation 24191. Up to 3807 conditions per place. [2024-05-12 10:36:25,997 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 207 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-05-12 10:36:25,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 244 transitions, 2539 flow [2024-05-12 10:36:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 10:36:25,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-05-12 10:36:25,998 INFO L175 Difference]: Start difference. First operand has 172 places, 203 transitions, 1944 flow. Second operand 7 states and 205 transitions. [2024-05-12 10:36:25,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 244 transitions, 2539 flow [2024-05-12 10:36:26,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 244 transitions, 2491 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:26,167 INFO L231 Difference]: Finished difference. Result has 175 places, 204 transitions, 1975 flow [2024-05-12 10:36:26,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1975, PETRI_PLACES=175, PETRI_TRANSITIONS=204} [2024-05-12 10:36:26,168 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-05-12 10:36:26,168 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 204 transitions, 1975 flow [2024-05-12 10:36:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:26,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:26,168 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 10:36:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:36:26,168 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:26,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1082496705, now seen corresponding path program 3 times [2024-05-12 10:36:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503017402] [2024-05-12 10:36:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:26,418 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 10:36:26,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503017402] [2024-05-12 10:36:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503017402] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:26,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:26,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961653890] [2024-05-12 10:36:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:26,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:26,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:26,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 204 transitions, 1975 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:26,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:26,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:26,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:26,998 INFO L124 PetriNetUnfolderBase]: 2718/4369 cut-off events. [2024-05-12 10:36:26,998 INFO L125 PetriNetUnfolderBase]: For 85675/85675 co-relation queries the response was YES. [2024-05-12 10:36:27,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23903 conditions, 4369 events. 2718/4369 cut-off events. For 85675/85675 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27225 event pairs, 677 based on Foata normal form. 12/4372 useless extension candidates. Maximal degree in co-relation 23825. Up to 3650 conditions per place. [2024-05-12 10:36:27,036 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 212 selfloop transitions, 25 changer transitions 0/250 dead transitions. [2024-05-12 10:36:27,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 250 transitions, 2634 flow [2024-05-12 10:36:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 10:36:27,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291793313069909 [2024-05-12 10:36:27,038 INFO L175 Difference]: Start difference. First operand has 175 places, 204 transitions, 1975 flow. Second operand 7 states and 207 transitions. [2024-05-12 10:36:27,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 250 transitions, 2634 flow [2024-05-12 10:36:27,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 250 transitions, 2542 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:27,177 INFO L231 Difference]: Finished difference. Result has 178 places, 207 transitions, 2007 flow [2024-05-12 10:36:27,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2007, PETRI_PLACES=178, PETRI_TRANSITIONS=207} [2024-05-12 10:36:27,178 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-05-12 10:36:27,178 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 207 transitions, 2007 flow [2024-05-12 10:36:27,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:27,178 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 10:36:27,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:36:27,179 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:27,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1000740699, now seen corresponding path program 4 times [2024-05-12 10:36:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:27,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11230886] [2024-05-12 10:36:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:27,427 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 10:36:27,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11230886] [2024-05-12 10:36:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11230886] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103331441] [2024-05-12 10:36:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:27,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:27,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 207 transitions, 2007 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:27,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:27,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:28,084 INFO L124 PetriNetUnfolderBase]: 2812/4527 cut-off events. [2024-05-12 10:36:28,085 INFO L125 PetriNetUnfolderBase]: For 91209/91211 co-relation queries the response was YES. [2024-05-12 10:36:28,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24524 conditions, 4527 events. 2812/4527 cut-off events. For 91209/91211 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28487 event pairs, 529 based on Foata normal form. 16/4538 useless extension candidates. Maximal degree in co-relation 24444. Up to 3795 conditions per place. [2024-05-12 10:36:28,124 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 203 selfloop transitions, 53 changer transitions 0/269 dead transitions. [2024-05-12 10:36:28,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 269 transitions, 2701 flow [2024-05-12 10:36:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-05-12 10:36:28,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191489361702127 [2024-05-12 10:36:28,125 INFO L175 Difference]: Start difference. First operand has 178 places, 207 transitions, 2007 flow. Second operand 10 states and 291 transitions. [2024-05-12 10:36:28,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 269 transitions, 2701 flow [2024-05-12 10:36:28,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 269 transitions, 2667 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:28,312 INFO L231 Difference]: Finished difference. Result has 185 places, 208 transitions, 2106 flow [2024-05-12 10:36:28,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2106, PETRI_PLACES=185, PETRI_TRANSITIONS=208} [2024-05-12 10:36:28,312 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 134 predicate places. [2024-05-12 10:36:28,312 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 208 transitions, 2106 flow [2024-05-12 10:36:28,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:28,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:28,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:36:28,313 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:28,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -295567765, now seen corresponding path program 5 times [2024-05-12 10:36:28,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:28,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587650794] [2024-05-12 10:36:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:28,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:28,559 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 10:36:28,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:28,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587650794] [2024-05-12 10:36:28,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587650794] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:28,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:28,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63211126] [2024-05-12 10:36:28,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:28,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:28,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 208 transitions, 2106 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:28,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:28,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:28,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:29,265 INFO L124 PetriNetUnfolderBase]: 3001/4844 cut-off events. [2024-05-12 10:36:29,265 INFO L125 PetriNetUnfolderBase]: For 105538/105540 co-relation queries the response was YES. [2024-05-12 10:36:29,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26979 conditions, 4844 events. 3001/4844 cut-off events. For 105538/105540 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31179 event pairs, 555 based on Foata normal form. 12/4851 useless extension candidates. Maximal degree in co-relation 26897. Up to 3805 conditions per place. [2024-05-12 10:36:29,306 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 55 changer transitions 0/277 dead transitions. [2024-05-12 10:36:29,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 277 transitions, 3004 flow [2024-05-12 10:36:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 295 transitions. [2024-05-12 10:36:29,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:36:29,308 INFO L175 Difference]: Start difference. First operand has 185 places, 208 transitions, 2106 flow. Second operand 10 states and 295 transitions. [2024-05-12 10:36:29,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 277 transitions, 3004 flow [2024-05-12 10:36:29,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 277 transitions, 2889 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:29,554 INFO L231 Difference]: Finished difference. Result has 188 places, 211 transitions, 2169 flow [2024-05-12 10:36:29,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2169, PETRI_PLACES=188, PETRI_TRANSITIONS=211} [2024-05-12 10:36:29,554 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-05-12 10:36:29,554 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 211 transitions, 2169 flow [2024-05-12 10:36:29,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:29,555 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 10:36:29,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:36:29,555 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:29,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2016212897, now seen corresponding path program 6 times [2024-05-12 10:36:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:29,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862036135] [2024-05-12 10:36:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:29,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862036135] [2024-05-12 10:36:29,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862036135] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:29,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:29,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93833410] [2024-05-12 10:36:29,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:29,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:29,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 211 transitions, 2169 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:29,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:29,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:30,536 INFO L124 PetriNetUnfolderBase]: 2973/4956 cut-off events. [2024-05-12 10:36:30,536 INFO L125 PetriNetUnfolderBase]: For 103880/103882 co-relation queries the response was YES. [2024-05-12 10:36:30,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26584 conditions, 4956 events. 2973/4956 cut-off events. For 103880/103882 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32786 event pairs, 1002 based on Foata normal form. 16/4927 useless extension candidates. Maximal degree in co-relation 26500. Up to 4054 conditions per place. [2024-05-12 10:36:30,584 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 211 selfloop transitions, 55 changer transitions 0/279 dead transitions. [2024-05-12 10:36:30,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 2902 flow [2024-05-12 10:36:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 314 transitions. [2024-05-12 10:36:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073500967117988 [2024-05-12 10:36:30,589 INFO L175 Difference]: Start difference. First operand has 188 places, 211 transitions, 2169 flow. Second operand 11 states and 314 transitions. [2024-05-12 10:36:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 2902 flow [2024-05-12 10:36:30,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 279 transitions, 2800 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:30,819 INFO L231 Difference]: Finished difference. Result has 193 places, 212 transitions, 2209 flow [2024-05-12 10:36:30,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2209, PETRI_PLACES=193, PETRI_TRANSITIONS=212} [2024-05-12 10:36:30,820 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-05-12 10:36:30,820 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 212 transitions, 2209 flow [2024-05-12 10:36:30,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:30,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:30,820 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 10:36:30,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:36:30,821 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:30,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:30,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1207667001, now seen corresponding path program 1 times [2024-05-12 10:36:30,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:30,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137916439] [2024-05-12 10:36:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:30,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:31,060 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 10:36:31,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137916439] [2024-05-12 10:36:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137916439] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:31,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689289082] [2024-05-12 10:36:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:31,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:31,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 212 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:31,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:31,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:31,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:31,751 INFO L124 PetriNetUnfolderBase]: 3040/4931 cut-off events. [2024-05-12 10:36:31,751 INFO L125 PetriNetUnfolderBase]: For 103877/103879 co-relation queries the response was YES. [2024-05-12 10:36:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26982 conditions, 4931 events. 3040/4931 cut-off events. For 103877/103879 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31940 event pairs, 719 based on Foata normal form. 12/4930 useless extension candidates. Maximal degree in co-relation 26896. Up to 3774 conditions per place. [2024-05-12 10:36:31,799 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 60 changer transitions 0/283 dead transitions. [2024-05-12 10:36:31,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 283 transitions, 2965 flow [2024-05-12 10:36:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2024-05-12 10:36:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112185686653772 [2024-05-12 10:36:31,800 INFO L175 Difference]: Start difference. First operand has 193 places, 212 transitions, 2209 flow. Second operand 11 states and 316 transitions. [2024-05-12 10:36:31,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 283 transitions, 2965 flow [2024-05-12 10:36:32,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 283 transitions, 2856 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-05-12 10:36:32,083 INFO L231 Difference]: Finished difference. Result has 195 places, 213 transitions, 2250 flow [2024-05-12 10:36:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2250, PETRI_PLACES=195, PETRI_TRANSITIONS=213} [2024-05-12 10:36:32,084 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-05-12 10:36:32,084 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 213 transitions, 2250 flow [2024-05-12 10:36:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:32,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:32,084 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 10:36:32,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:36:32,085 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:32,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 619952965, now seen corresponding path program 7 times [2024-05-12 10:36:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:32,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491971408] [2024-05-12 10:36:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:32,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:32,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491971408] [2024-05-12 10:36:32,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491971408] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:32,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:32,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607407248] [2024-05-12 10:36:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:32,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:32,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:32,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 213 transitions, 2250 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:32,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:32,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:33,126 INFO L124 PetriNetUnfolderBase]: 3134/5062 cut-off events. [2024-05-12 10:36:33,127 INFO L125 PetriNetUnfolderBase]: For 113482/113482 co-relation queries the response was YES. [2024-05-12 10:36:33,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28036 conditions, 5062 events. 3134/5062 cut-off events. For 113482/113482 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33055 event pairs, 596 based on Foata normal form. 16/5074 useless extension candidates. Maximal degree in co-relation 27949. Up to 4313 conditions per place. [2024-05-12 10:36:33,167 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 217 selfloop transitions, 54 changer transitions 0/284 dead transitions. [2024-05-12 10:36:33,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 284 transitions, 3000 flow [2024-05-12 10:36:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:36:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:36:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 337 transitions. [2024-05-12 10:36:33,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975177304964538 [2024-05-12 10:36:33,169 INFO L175 Difference]: Start difference. First operand has 195 places, 213 transitions, 2250 flow. Second operand 12 states and 337 transitions. [2024-05-12 10:36:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 284 transitions, 3000 flow [2024-05-12 10:36:33,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 284 transitions, 2864 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-05-12 10:36:33,420 INFO L231 Difference]: Finished difference. Result has 198 places, 214 transitions, 2255 flow [2024-05-12 10:36:33,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2255, PETRI_PLACES=198, PETRI_TRANSITIONS=214} [2024-05-12 10:36:33,421 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-05-12 10:36:33,421 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 214 transitions, 2255 flow [2024-05-12 10:36:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:33,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:33,421 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 10:36:33,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:36:33,422 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:33,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash 508693911, now seen corresponding path program 8 times [2024-05-12 10:36:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40480633] [2024-05-12 10:36:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40480633] [2024-05-12 10:36:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40480633] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:33,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200954796] [2024-05-12 10:36:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:33,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:33,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 214 transitions, 2255 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:33,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:33,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:33,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:34,405 INFO L124 PetriNetUnfolderBase]: 3228/5212 cut-off events. [2024-05-12 10:36:34,405 INFO L125 PetriNetUnfolderBase]: For 119601/119601 co-relation queries the response was YES. [2024-05-12 10:36:34,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28735 conditions, 5212 events. 3228/5212 cut-off events. For 119601/119601 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34094 event pairs, 610 based on Foata normal form. 16/5224 useless extension candidates. Maximal degree in co-relation 28647. Up to 4463 conditions per place. [2024-05-12 10:36:34,458 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 57 changer transitions 0/279 dead transitions. [2024-05-12 10:36:34,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 279 transitions, 2983 flow [2024-05-12 10:36:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-05-12 10:36:34,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:36:34,459 INFO L175 Difference]: Start difference. First operand has 198 places, 214 transitions, 2255 flow. Second operand 11 states and 308 transitions. [2024-05-12 10:36:34,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 279 transitions, 2983 flow [2024-05-12 10:36:34,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 279 transitions, 2860 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-05-12 10:36:34,721 INFO L231 Difference]: Finished difference. Result has 199 places, 215 transitions, 2281 flow [2024-05-12 10:36:34,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2281, PETRI_PLACES=199, PETRI_TRANSITIONS=215} [2024-05-12 10:36:34,722 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-05-12 10:36:34,722 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 215 transitions, 2281 flow [2024-05-12 10:36:34,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:34,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:34,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:36:34,723 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:34,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1374606267, now seen corresponding path program 9 times [2024-05-12 10:36:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:34,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155347403] [2024-05-12 10:36:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:34,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:34,975 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 10:36:34,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155347403] [2024-05-12 10:36:34,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155347403] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:34,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:34,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559618574] [2024-05-12 10:36:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:34,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:35,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 215 transitions, 2281 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:35,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:35,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:35,731 INFO L124 PetriNetUnfolderBase]: 3322/5529 cut-off events. [2024-05-12 10:36:35,731 INFO L125 PetriNetUnfolderBase]: For 126455/126455 co-relation queries the response was YES. [2024-05-12 10:36:35,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29702 conditions, 5529 events. 3322/5529 cut-off events. For 126455/126455 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37265 event pairs, 730 based on Foata normal form. 16/5539 useless extension candidates. Maximal degree in co-relation 29613. Up to 4613 conditions per place. [2024-05-12 10:36:35,791 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 208 selfloop transitions, 53 changer transitions 0/274 dead transitions. [2024-05-12 10:36:35,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 274 transitions, 2987 flow [2024-05-12 10:36:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-05-12 10:36:35,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:36:35,792 INFO L175 Difference]: Start difference. First operand has 199 places, 215 transitions, 2281 flow. Second operand 10 states and 285 transitions. [2024-05-12 10:36:35,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 274 transitions, 2987 flow [2024-05-12 10:36:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 274 transitions, 2856 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-05-12 10:36:36,102 INFO L231 Difference]: Finished difference. Result has 200 places, 216 transitions, 2293 flow [2024-05-12 10:36:36,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2293, PETRI_PLACES=200, PETRI_TRANSITIONS=216} [2024-05-12 10:36:36,103 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2024-05-12 10:36:36,103 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 216 transitions, 2293 flow [2024-05-12 10:36:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:36,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:36,103 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 10:36:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:36:36,103 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:36,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1374609987, now seen corresponding path program 10 times [2024-05-12 10:36:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:36,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231139172] [2024-05-12 10:36:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:36,343 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 10:36:36,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:36,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231139172] [2024-05-12 10:36:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231139172] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:36,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:36,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552898898] [2024-05-12 10:36:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:36,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:36,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 216 transitions, 2293 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:36,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:36,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:37,126 INFO L124 PetriNetUnfolderBase]: 3354/5432 cut-off events. [2024-05-12 10:36:37,126 INFO L125 PetriNetUnfolderBase]: For 124002/124002 co-relation queries the response was YES. [2024-05-12 10:36:37,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 5432 events. 3354/5432 cut-off events. For 124002/124002 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35847 event pairs, 618 based on Foata normal form. 12/5440 useless extension candidates. Maximal degree in co-relation 29442. Up to 4280 conditions per place. [2024-05-12 10:36:37,176 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-05-12 10:36:37,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 280 transitions, 3069 flow [2024-05-12 10:36:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-05-12 10:36:37,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106382978723405 [2024-05-12 10:36:37,177 INFO L175 Difference]: Start difference. First operand has 200 places, 216 transitions, 2293 flow. Second operand 10 states and 287 transitions. [2024-05-12 10:36:37,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 280 transitions, 3069 flow [2024-05-12 10:36:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 2944 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:37,510 INFO L231 Difference]: Finished difference. Result has 203 places, 219 transitions, 2374 flow [2024-05-12 10:36:37,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2374, PETRI_PLACES=203, PETRI_TRANSITIONS=219} [2024-05-12 10:36:37,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2024-05-12 10:36:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 219 transitions, 2374 flow [2024-05-12 10:36:37,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:37,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:37,511 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 10:36:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:36:37,511 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:37,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1368884535, now seen corresponding path program 2 times [2024-05-12 10:36:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584727152] [2024-05-12 10:36:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584727152] [2024-05-12 10:36:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584727152] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:37,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:37,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036649954] [2024-05-12 10:36:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:37,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:37,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 219 transitions, 2374 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:37,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:37,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:37,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:38,615 INFO L124 PetriNetUnfolderBase]: 3421/5735 cut-off events. [2024-05-12 10:36:38,615 INFO L125 PetriNetUnfolderBase]: For 131044/131044 co-relation queries the response was YES. [2024-05-12 10:36:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30461 conditions, 5735 events. 3421/5735 cut-off events. For 131044/131044 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39445 event pairs, 1125 based on Foata normal form. 12/5695 useless extension candidates. Maximal degree in co-relation 30369. Up to 4521 conditions per place. [2024-05-12 10:36:38,675 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 222 selfloop transitions, 58 changer transitions 0/293 dead transitions. [2024-05-12 10:36:38,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 293 transitions, 3166 flow [2024-05-12 10:36:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:36:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:36:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-05-12 10:36:38,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601063829787234 [2024-05-12 10:36:38,676 INFO L175 Difference]: Start difference. First operand has 203 places, 219 transitions, 2374 flow. Second operand 12 states and 339 transitions. [2024-05-12 10:36:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 293 transitions, 3166 flow [2024-05-12 10:36:39,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 293 transitions, 3060 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:39,005 INFO L231 Difference]: Finished difference. Result has 209 places, 220 transitions, 2424 flow [2024-05-12 10:36:39,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2424, PETRI_PLACES=209, PETRI_TRANSITIONS=220} [2024-05-12 10:36:39,005 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-05-12 10:36:39,005 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 220 transitions, 2424 flow [2024-05-12 10:36:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:39,006 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 10:36:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:36:39,006 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:39,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 516318423, now seen corresponding path program 3 times [2024-05-12 10:36:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:39,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848064130] [2024-05-12 10:36:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:39,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:39,247 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 10:36:39,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:39,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848064130] [2024-05-12 10:36:39,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848064130] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:39,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:39,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:39,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804233371] [2024-05-12 10:36:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:39,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:39,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:39,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 220 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:39,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:39,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:39,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:40,086 INFO L124 PetriNetUnfolderBase]: 3488/5902 cut-off events. [2024-05-12 10:36:40,086 INFO L125 PetriNetUnfolderBase]: For 136919/136919 co-relation queries the response was YES. [2024-05-12 10:36:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31324 conditions, 5902 events. 3488/5902 cut-off events. For 136919/136919 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41091 event pairs, 1172 based on Foata normal form. 12/5859 useless extension candidates. Maximal degree in co-relation 31230. Up to 4762 conditions per place. [2024-05-12 10:36:40,147 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 221 selfloop transitions, 60 changer transitions 0/294 dead transitions. [2024-05-12 10:36:40,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 294 transitions, 3220 flow [2024-05-12 10:36:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:36:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:36:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 336 transitions. [2024-05-12 10:36:40,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:36:40,148 INFO L175 Difference]: Start difference. First operand has 209 places, 220 transitions, 2424 flow. Second operand 12 states and 336 transitions. [2024-05-12 10:36:40,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 294 transitions, 3220 flow [2024-05-12 10:36:40,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 294 transitions, 3078 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-05-12 10:36:40,452 INFO L231 Difference]: Finished difference. Result has 211 places, 221 transitions, 2444 flow [2024-05-12 10:36:40,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2444, PETRI_PLACES=211, PETRI_TRANSITIONS=221} [2024-05-12 10:36:40,453 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-05-12 10:36:40,453 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 221 transitions, 2444 flow [2024-05-12 10:36:40,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:40,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:40,453 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 10:36:40,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:36:40,454 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:40,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1156128857, now seen corresponding path program 4 times [2024-05-12 10:36:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:40,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227345180] [2024-05-12 10:36:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:40,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:40,684 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 10:36:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:40,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227345180] [2024-05-12 10:36:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227345180] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:40,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:40,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473095598] [2024-05-12 10:36:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:40,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:40,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 221 transitions, 2444 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:40,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:40,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:40,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:41,552 INFO L124 PetriNetUnfolderBase]: 3468/5766 cut-off events. [2024-05-12 10:36:41,552 INFO L125 PetriNetUnfolderBase]: For 127884/127884 co-relation queries the response was YES. [2024-05-12 10:36:41,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30336 conditions, 5766 events. 3468/5766 cut-off events. For 127884/127884 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39470 event pairs, 973 based on Foata normal form. 12/5737 useless extension candidates. Maximal degree in co-relation 30241. Up to 3662 conditions per place. [2024-05-12 10:36:41,610 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 203 selfloop transitions, 72 changer transitions 0/288 dead transitions. [2024-05-12 10:36:41,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 288 transitions, 3100 flow [2024-05-12 10:36:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:36:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:36:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 310 transitions. [2024-05-12 10:36:41,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5996131528046421 [2024-05-12 10:36:41,611 INFO L175 Difference]: Start difference. First operand has 211 places, 221 transitions, 2444 flow. Second operand 11 states and 310 transitions. [2024-05-12 10:36:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 288 transitions, 3100 flow [2024-05-12 10:36:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 288 transitions, 2952 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-05-12 10:36:41,981 INFO L231 Difference]: Finished difference. Result has 211 places, 220 transitions, 2362 flow [2024-05-12 10:36:41,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2362, PETRI_PLACES=211, PETRI_TRANSITIONS=220} [2024-05-12 10:36:41,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-05-12 10:36:41,981 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 220 transitions, 2362 flow [2024-05-12 10:36:41,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:41,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:41,982 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 10:36:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:36:41,982 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 10:36:41,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1345299494, now seen corresponding path program 1 times [2024-05-12 10:36:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825466441] [2024-05-12 10:36:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:42,218 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 10:36:42,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825466441] [2024-05-12 10:36:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825466441] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:42,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:42,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235679082] [2024-05-12 10:36:42,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:42,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 220 transitions, 2362 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 10:36:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:42,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:42,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:42,971 INFO L124 PetriNetUnfolderBase]: 3520/5746 cut-off events. [2024-05-12 10:36:42,971 INFO L125 PetriNetUnfolderBase]: For 122876/122876 co-relation queries the response was YES. [2024-05-12 10:36:43,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30858 conditions, 5746 events. 3520/5746 cut-off events. For 122876/122876 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38828 event pairs, 682 based on Foata normal form. 2/5740 useless extension candidates. Maximal degree in co-relation 30762. Up to 4880 conditions per place. [2024-05-12 10:36:43,026 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 185 selfloop transitions, 64 changer transitions 0/262 dead transitions. [2024-05-12 10:36:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 262 transitions, 3312 flow [2024-05-12 10:36:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:36:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139817629179332 [2024-05-12 10:36:43,027 INFO L175 Difference]: Start difference. First operand has 211 places, 220 transitions, 2362 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:36:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 262 transitions, 3312 flow [2024-05-12 10:36:43,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 262 transitions, 3047 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-05-12 10:36:43,313 INFO L231 Difference]: Finished difference. Result has 207 places, 231 transitions, 2410 flow [2024-05-12 10:36:43,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2410, PETRI_PLACES=207, PETRI_TRANSITIONS=231} [2024-05-12 10:36:43,314 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-05-12 10:36:43,314 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 231 transitions, 2410 flow [2024-05-12 10:36:43,315 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 10:36:43,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:43,315 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 10:36:43,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:36:43,315 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 10:36:43,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1345149764, now seen corresponding path program 2 times [2024-05-12 10:36:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:43,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158914496] [2024-05-12 10:36:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158914496] [2024-05-12 10:36:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158914496] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:43,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:43,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947120742] [2024-05-12 10:36:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:43,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 231 transitions, 2410 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 10:36:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:43,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:43,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:44,334 INFO L124 PetriNetUnfolderBase]: 3598/6073 cut-off events. [2024-05-12 10:36:44,334 INFO L125 PetriNetUnfolderBase]: For 132812/132812 co-relation queries the response was YES. [2024-05-12 10:36:44,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31418 conditions, 6073 events. 3598/6073 cut-off events. For 132812/132812 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 42290 event pairs, 840 based on Foata normal form. 2/6060 useless extension candidates. Maximal degree in co-relation 31323. Up to 5121 conditions per place. [2024-05-12 10:36:44,397 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 203 selfloop transitions, 59 changer transitions 0/275 dead transitions. [2024-05-12 10:36:44,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 275 transitions, 3394 flow [2024-05-12 10:36:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 10:36:44,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2024-05-12 10:36:44,398 INFO L175 Difference]: Start difference. First operand has 207 places, 231 transitions, 2410 flow. Second operand 9 states and 246 transitions. [2024-05-12 10:36:44,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 275 transitions, 3394 flow [2024-05-12 10:36:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 275 transitions, 3273 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:44,878 INFO L231 Difference]: Finished difference. Result has 215 places, 243 transitions, 2633 flow [2024-05-12 10:36:44,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2633, PETRI_PLACES=215, PETRI_TRANSITIONS=243} [2024-05-12 10:36:44,879 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 164 predicate places. [2024-05-12 10:36:44,879 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 243 transitions, 2633 flow [2024-05-12 10:36:44,879 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 10:36:44,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:44,879 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 10:36:44,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:36:44,879 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 10:36:44,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1345155344, now seen corresponding path program 3 times [2024-05-12 10:36:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:44,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390989651] [2024-05-12 10:36:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:45,172 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 10:36:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:45,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390989651] [2024-05-12 10:36:45,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390989651] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:45,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:45,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:45,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284009271] [2024-05-12 10:36:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:45,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:45,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:45,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 243 transitions, 2633 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 10:36:45,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:45,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:45,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:46,046 INFO L124 PetriNetUnfolderBase]: 3594/6075 cut-off events. [2024-05-12 10:36:46,046 INFO L125 PetriNetUnfolderBase]: For 135848/135848 co-relation queries the response was YES. [2024-05-12 10:36:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 6075 events. 3594/6075 cut-off events. For 135848/135848 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 42362 event pairs, 843 based on Foata normal form. 2/6062 useless extension candidates. Maximal degree in co-relation 31586. Up to 5119 conditions per place. [2024-05-12 10:36:46,110 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 201 selfloop transitions, 54 changer transitions 0/268 dead transitions. [2024-05-12 10:36:46,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 268 transitions, 3297 flow [2024-05-12 10:36:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:36:46,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987841945288754 [2024-05-12 10:36:46,111 INFO L175 Difference]: Start difference. First operand has 215 places, 243 transitions, 2633 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:36:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 268 transitions, 3297 flow [2024-05-12 10:36:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 268 transitions, 3091 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:46,416 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2543 flow [2024-05-12 10:36:46,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2543, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2024-05-12 10:36:46,417 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 166 predicate places. [2024-05-12 10:36:46,417 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2543 flow [2024-05-12 10:36:46,417 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 10:36:46,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:46,417 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 10:36:46,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:36:46,417 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 10:36:46,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1092138304, now seen corresponding path program 4 times [2024-05-12 10:36:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:46,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757226638] [2024-05-12 10:36:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:46,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757226638] [2024-05-12 10:36:46,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757226638] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:46,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:46,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045970437] [2024-05-12 10:36:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:46,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:46,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:46,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:46,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2543 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 10:36:46,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:46,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:46,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:47,442 INFO L124 PetriNetUnfolderBase]: 3630/5962 cut-off events. [2024-05-12 10:36:47,442 INFO L125 PetriNetUnfolderBase]: For 140590/140592 co-relation queries the response was YES. [2024-05-12 10:36:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31785 conditions, 5962 events. 3630/5962 cut-off events. For 140590/140592 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40735 event pairs, 723 based on Foata normal form. 4/5955 useless extension candidates. Maximal degree in co-relation 31686. Up to 5033 conditions per place. [2024-05-12 10:36:47,503 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 183 selfloop transitions, 85 changer transitions 0/281 dead transitions. [2024-05-12 10:36:47,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 281 transitions, 3507 flow [2024-05-12 10:36:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 10:36:47,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904255319148937 [2024-05-12 10:36:47,504 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2543 flow. Second operand 8 states and 222 transitions. [2024-05-12 10:36:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 281 transitions, 3507 flow [2024-05-12 10:36:47,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 281 transitions, 3399 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:47,891 INFO L231 Difference]: Finished difference. Result has 220 places, 252 transitions, 2816 flow [2024-05-12 10:36:47,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2816, PETRI_PLACES=220, PETRI_TRANSITIONS=252} [2024-05-12 10:36:47,892 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-05-12 10:36:47,892 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 252 transitions, 2816 flow [2024-05-12 10:36:47,892 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 10:36:47,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:47,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:47,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:36:47,892 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 10:36:47,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1099489954, now seen corresponding path program 5 times [2024-05-12 10:36:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055603970] [2024-05-12 10:36:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:47,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:48,133 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 10:36:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055603970] [2024-05-12 10:36:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055603970] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:48,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883835796] [2024-05-12 10:36:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:48,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:48,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 252 transitions, 2816 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 10:36:48,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:48,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:48,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:48,904 INFO L124 PetriNetUnfolderBase]: 3652/5971 cut-off events. [2024-05-12 10:36:48,904 INFO L125 PetriNetUnfolderBase]: For 146457/146457 co-relation queries the response was YES. [2024-05-12 10:36:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32568 conditions, 5971 events. 3652/5971 cut-off events. For 146457/146457 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40683 event pairs, 684 based on Foata normal form. 2/5965 useless extension candidates. Maximal degree in co-relation 32467. Up to 5053 conditions per place. [2024-05-12 10:36:48,966 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 187 selfloop transitions, 88 changer transitions 0/288 dead transitions. [2024-05-12 10:36:48,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 288 transitions, 3719 flow [2024-05-12 10:36:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:36:48,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.598404255319149 [2024-05-12 10:36:48,967 INFO L175 Difference]: Start difference. First operand has 220 places, 252 transitions, 2816 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:36:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 288 transitions, 3719 flow [2024-05-12 10:36:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 288 transitions, 3500 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:49,428 INFO L231 Difference]: Finished difference. Result has 224 places, 256 transitions, 2862 flow [2024-05-12 10:36:49,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2862, PETRI_PLACES=224, PETRI_TRANSITIONS=256} [2024-05-12 10:36:49,429 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 173 predicate places. [2024-05-12 10:36:49,429 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 256 transitions, 2862 flow [2024-05-12 10:36:49,429 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 10:36:49,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:49,429 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 10:36:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:36:49,430 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 10:36:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1099495534, now seen corresponding path program 6 times [2024-05-12 10:36:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:49,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064819682] [2024-05-12 10:36:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:49,676 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 10:36:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:49,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064819682] [2024-05-12 10:36:49,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064819682] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:49,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:49,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121973861] [2024-05-12 10:36:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:49,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:49,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:49,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 256 transitions, 2862 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 10:36:49,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:49,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:49,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:50,440 INFO L124 PetriNetUnfolderBase]: 3648/6220 cut-off events. [2024-05-12 10:36:50,440 INFO L125 PetriNetUnfolderBase]: For 147182/147182 co-relation queries the response was YES. [2024-05-12 10:36:50,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32769 conditions, 6220 events. 3648/6220 cut-off events. For 147182/147182 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43831 event pairs, 842 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 32666. Up to 5051 conditions per place. [2024-05-12 10:36:50,502 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 190 selfloop transitions, 78 changer transitions 0/281 dead transitions. [2024-05-12 10:36:50,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 281 transitions, 3560 flow [2024-05-12 10:36:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:36:50,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:36:50,503 INFO L175 Difference]: Start difference. First operand has 224 places, 256 transitions, 2862 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:36:50,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 281 transitions, 3560 flow [2024-05-12 10:36:50,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 281 transitions, 3323 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:50,904 INFO L231 Difference]: Finished difference. Result has 223 places, 256 transitions, 2797 flow [2024-05-12 10:36:50,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2797, PETRI_PLACES=223, PETRI_TRANSITIONS=256} [2024-05-12 10:36:50,905 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 172 predicate places. [2024-05-12 10:36:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 256 transitions, 2797 flow [2024-05-12 10:36:50,905 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 10:36:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:50,905 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 10:36:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:36:50,905 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 10:36:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1111919014, now seen corresponding path program 1 times [2024-05-12 10:36:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252403153] [2024-05-12 10:36:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:51,147 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 10:36:51,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:51,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252403153] [2024-05-12 10:36:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252403153] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443762792] [2024-05-12 10:36:51,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:51,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:51,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 256 transitions, 2797 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 10:36:51,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:51,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:51,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:51,937 INFO L124 PetriNetUnfolderBase]: 3701/6105 cut-off events. [2024-05-12 10:36:51,937 INFO L125 PetriNetUnfolderBase]: For 150702/150704 co-relation queries the response was YES. [2024-05-12 10:36:52,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33271 conditions, 6105 events. 3701/6105 cut-off events. For 150702/150704 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41929 event pairs, 746 based on Foata normal form. 1/6075 useless extension candidates. Maximal degree in co-relation 33168. Up to 5044 conditions per place. [2024-05-12 10:36:52,099 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 187 selfloop transitions, 101 changer transitions 0/301 dead transitions. [2024-05-12 10:36:52,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 301 transitions, 3851 flow [2024-05-12 10:36:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:36:52,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352583586626139 [2024-05-12 10:36:52,100 INFO L175 Difference]: Start difference. First operand has 223 places, 256 transitions, 2797 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:36:52,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 301 transitions, 3851 flow [2024-05-12 10:36:52,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 301 transitions, 3668 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:52,575 INFO L231 Difference]: Finished difference. Result has 224 places, 266 transitions, 3014 flow [2024-05-12 10:36:52,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3014, PETRI_PLACES=224, PETRI_TRANSITIONS=266} [2024-05-12 10:36:52,575 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 173 predicate places. [2024-05-12 10:36:52,575 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 266 transitions, 3014 flow [2024-05-12 10:36:52,575 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 10:36:52,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:52,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:52,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:36:52,576 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 10:36:52,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1611393226, now seen corresponding path program 2 times [2024-05-12 10:36:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:52,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466501458] [2024-05-12 10:36:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:52,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466501458] [2024-05-12 10:36:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466501458] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13715835] [2024-05-12 10:36:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:52,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:52,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 266 transitions, 3014 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 10:36:52,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:52,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:53,650 INFO L124 PetriNetUnfolderBase]: 3698/6081 cut-off events. [2024-05-12 10:36:53,650 INFO L125 PetriNetUnfolderBase]: For 149164/149166 co-relation queries the response was YES. [2024-05-12 10:36:53,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33212 conditions, 6081 events. 3698/6081 cut-off events. For 149164/149166 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41626 event pairs, 695 based on Foata normal form. 3/6065 useless extension candidates. Maximal degree in co-relation 33109. Up to 5322 conditions per place. [2024-05-12 10:36:53,711 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 230 selfloop transitions, 53 changer transitions 0/296 dead transitions. [2024-05-12 10:36:53,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 296 transitions, 3650 flow [2024-05-12 10:36:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:36:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:36:53,712 INFO L175 Difference]: Start difference. First operand has 224 places, 266 transitions, 3014 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:36:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 296 transitions, 3650 flow [2024-05-12 10:36:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 296 transitions, 3463 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:54,159 INFO L231 Difference]: Finished difference. Result has 228 places, 266 transitions, 2939 flow [2024-05-12 10:36:54,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2939, PETRI_PLACES=228, PETRI_TRANSITIONS=266} [2024-05-12 10:36:54,159 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 177 predicate places. [2024-05-12 10:36:54,159 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 266 transitions, 2939 flow [2024-05-12 10:36:54,159 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 10:36:54,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:54,159 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 10:36:54,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:36:54,160 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 10:36:54,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 17463146, now seen corresponding path program 3 times [2024-05-12 10:36:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:54,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265929961] [2024-05-12 10:36:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:54,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:54,418 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 10:36:54,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:54,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265929961] [2024-05-12 10:36:54,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265929961] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:54,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:54,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323311757] [2024-05-12 10:36:54,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:54,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:54,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 266 transitions, 2939 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 10:36:54,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:54,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:55,248 INFO L124 PetriNetUnfolderBase]: 3756/6159 cut-off events. [2024-05-12 10:36:55,248 INFO L125 PetriNetUnfolderBase]: For 155297/155299 co-relation queries the response was YES. [2024-05-12 10:36:55,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33703 conditions, 6159 events. 3756/6159 cut-off events. For 155297/155299 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 42132 event pairs, 698 based on Foata normal form. 3/6146 useless extension candidates. Maximal degree in co-relation 33599. Up to 5361 conditions per place. [2024-05-12 10:36:55,314 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 231 selfloop transitions, 68 changer transitions 0/312 dead transitions. [2024-05-12 10:36:55,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 312 transitions, 3956 flow [2024-05-12 10:36:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:36:55,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:36:55,315 INFO L175 Difference]: Start difference. First operand has 228 places, 266 transitions, 2939 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:36:55,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 312 transitions, 3956 flow [2024-05-12 10:36:55,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 312 transitions, 3808 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:55,792 INFO L231 Difference]: Finished difference. Result has 234 places, 281 transitions, 3210 flow [2024-05-12 10:36:55,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3210, PETRI_PLACES=234, PETRI_TRANSITIONS=281} [2024-05-12 10:36:55,792 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 183 predicate places. [2024-05-12 10:36:55,792 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 281 transitions, 3210 flow [2024-05-12 10:36:55,792 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 10:36:55,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:55,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:55,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:36:55,793 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 10:36:55,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash -901962744, now seen corresponding path program 4 times [2024-05-12 10:36:55,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:55,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159685225] [2024-05-12 10:36:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:55,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:56,055 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 10:36:56,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:56,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159685225] [2024-05-12 10:36:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159685225] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:56,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485834215] [2024-05-12 10:36:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:56,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:56,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 281 transitions, 3210 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 10:36:56,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:56,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:56,902 INFO L124 PetriNetUnfolderBase]: 3823/6249 cut-off events. [2024-05-12 10:36:56,902 INFO L125 PetriNetUnfolderBase]: For 167237/167237 co-relation queries the response was YES. [2024-05-12 10:36:56,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 6249 events. 3823/6249 cut-off events. For 167237/167237 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 42925 event pairs, 686 based on Foata normal form. 1/6240 useless extension candidates. Maximal degree in co-relation 34778. Up to 5130 conditions per place. [2024-05-12 10:36:56,973 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 195 selfloop transitions, 117 changer transitions 0/325 dead transitions. [2024-05-12 10:36:56,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 325 transitions, 4423 flow [2024-05-12 10:36:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:36:56,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261398176291794 [2024-05-12 10:36:56,974 INFO L175 Difference]: Start difference. First operand has 234 places, 281 transitions, 3210 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:36:56,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 325 transitions, 4423 flow [2024-05-12 10:36:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 325 transitions, 4301 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:57,669 INFO L231 Difference]: Finished difference. Result has 239 places, 292 transitions, 3517 flow [2024-05-12 10:36:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3088, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3517, PETRI_PLACES=239, PETRI_TRANSITIONS=292} [2024-05-12 10:36:57,669 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-05-12 10:36:57,669 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 292 transitions, 3517 flow [2024-05-12 10:36:57,670 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 10:36:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:57,670 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 10:36:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:36:57,670 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 10:36:57,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1122172390, now seen corresponding path program 5 times [2024-05-12 10:36:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138999574] [2024-05-12 10:36:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138999574] [2024-05-12 10:36:57,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138999574] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:57,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:57,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980383687] [2024-05-12 10:36:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:57,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:57,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:57,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:57,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 292 transitions, 3517 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 10:36:57,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:57,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:57,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:58,807 INFO L124 PetriNetUnfolderBase]: 3834/6542 cut-off events. [2024-05-12 10:36:58,807 INFO L125 PetriNetUnfolderBase]: For 175942/175942 co-relation queries the response was YES. [2024-05-12 10:36:58,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35715 conditions, 6542 events. 3834/6542 cut-off events. For 175942/175942 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46392 event pairs, 850 based on Foata normal form. 1/6523 useless extension candidates. Maximal degree in co-relation 35607. Up to 5138 conditions per place. [2024-05-12 10:36:58,880 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 197 selfloop transitions, 117 changer transitions 0/327 dead transitions. [2024-05-12 10:36:58,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 327 transitions, 4490 flow [2024-05-12 10:36:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:36:58,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-05-12 10:36:58,881 INFO L175 Difference]: Start difference. First operand has 239 places, 292 transitions, 3517 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:36:58,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 327 transitions, 4490 flow [2024-05-12 10:36:59,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 4216 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:59,471 INFO L231 Difference]: Finished difference. Result has 242 places, 295 transitions, 3534 flow [2024-05-12 10:36:59,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3534, PETRI_PLACES=242, PETRI_TRANSITIONS=295} [2024-05-12 10:36:59,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-05-12 10:36:59,471 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 295 transitions, 3534 flow [2024-05-12 10:36:59,472 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 10:36:59,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:59,472 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 10:36:59,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:36:59,472 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 10:36:59,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2138027240, now seen corresponding path program 6 times [2024-05-12 10:36:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135169970] [2024-05-12 10:36:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:59,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:59,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135169970] [2024-05-12 10:36:59,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135169970] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:59,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:59,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106088551] [2024-05-12 10:36:59,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:59,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:36:59,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 295 transitions, 3534 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 10:36:59,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:59,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:36:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:00,714 INFO L124 PetriNetUnfolderBase]: 3826/6530 cut-off events. [2024-05-12 10:37:00,714 INFO L125 PetriNetUnfolderBase]: For 178671/178671 co-relation queries the response was YES. [2024-05-12 10:37:00,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35580 conditions, 6530 events. 3826/6530 cut-off events. For 178671/178671 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46363 event pairs, 850 based on Foata normal form. 2/6512 useless extension candidates. Maximal degree in co-relation 35471. Up to 5130 conditions per place. [2024-05-12 10:37:00,793 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 201 selfloop transitions, 109 changer transitions 0/323 dead transitions. [2024-05-12 10:37:00,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 323 transitions, 4330 flow [2024-05-12 10:37:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 10:37:00,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6109422492401215 [2024-05-12 10:37:00,794 INFO L175 Difference]: Start difference. First operand has 242 places, 295 transitions, 3534 flow. Second operand 7 states and 201 transitions. [2024-05-12 10:37:00,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 323 transitions, 4330 flow [2024-05-12 10:37:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 323 transitions, 4025 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:01,410 INFO L231 Difference]: Finished difference. Result has 244 places, 295 transitions, 3455 flow [2024-05-12 10:37:01,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3455, PETRI_PLACES=244, PETRI_TRANSITIONS=295} [2024-05-12 10:37:01,410 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-05-12 10:37:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 295 transitions, 3455 flow [2024-05-12 10:37:01,411 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 10:37:01,411 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] [2024-05-12 10:37:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:37:01,411 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 10:37:01,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash 865791850, now seen corresponding path program 7 times [2024-05-12 10:37:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:01,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643851689] [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 10:37:01,673 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 10:37:01,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:01,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643851689] [2024-05-12 10:37:01,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643851689] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:01,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:01,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989084748] [2024-05-12 10:37:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:01,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:01,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:01,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:01,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 295 transitions, 3455 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 10:37:01,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:01,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:01,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:02,557 INFO L124 PetriNetUnfolderBase]: 3823/6471 cut-off events. [2024-05-12 10:37:02,558 INFO L125 PetriNetUnfolderBase]: For 179681/179681 co-relation queries the response was YES. [2024-05-12 10:37:02,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35353 conditions, 6471 events. 3823/6471 cut-off events. For 179681/179681 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 45678 event pairs, 855 based on Foata normal form. 1/6453 useless extension candidates. Maximal degree in co-relation 35243. Up to 5467 conditions per place. [2024-05-12 10:37:02,634 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 57 changer transitions 0/322 dead transitions. [2024-05-12 10:37:02,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 322 transitions, 4135 flow [2024-05-12 10:37:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:37:02,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:37:02,635 INFO L175 Difference]: Start difference. First operand has 244 places, 295 transitions, 3455 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:37:02,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 322 transitions, 4135 flow [2024-05-12 10:37:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 322 transitions, 3877 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:03,213 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3317 flow [2024-05-12 10:37:03,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3317, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-05-12 10:37:03,214 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-05-12 10:37:03,214 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3317 flow [2024-05-12 10:37:03,214 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 10:37:03,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:03,214 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 10:37:03,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:37:03,215 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 10:37:03,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1049598592, now seen corresponding path program 8 times [2024-05-12 10:37:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:03,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994606496] [2024-05-12 10:37:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:03,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994606496] [2024-05-12 10:37:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994606496] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:03,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:03,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:03,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932776649] [2024-05-12 10:37:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:03,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:03,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:03,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3317 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 10:37:03,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:03,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:03,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:04,358 INFO L124 PetriNetUnfolderBase]: 3817/6453 cut-off events. [2024-05-12 10:37:04,359 INFO L125 PetriNetUnfolderBase]: For 181400/181400 co-relation queries the response was YES. [2024-05-12 10:37:04,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34849 conditions, 6453 events. 3817/6453 cut-off events. For 181400/181400 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 45501 event pairs, 849 based on Foata normal form. 2/6436 useless extension candidates. Maximal degree in co-relation 34738. Up to 5370 conditions per place. [2024-05-12 10:37:04,432 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 239 selfloop transitions, 68 changer transitions 0/320 dead transitions. [2024-05-12 10:37:04,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 320 transitions, 4103 flow [2024-05-12 10:37:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:37:04,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987841945288754 [2024-05-12 10:37:04,433 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3317 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:37:04,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 320 transitions, 4103 flow [2024-05-12 10:37:04,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 320 transitions, 3987 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:04,999 INFO L231 Difference]: Finished difference. Result has 247 places, 295 transitions, 3346 flow [2024-05-12 10:37:04,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3346, PETRI_PLACES=247, PETRI_TRANSITIONS=295} [2024-05-12 10:37:04,999 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-05-12 10:37:04,999 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 295 transitions, 3346 flow [2024-05-12 10:37:05,000 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 10:37:05,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:05,000 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 10:37:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:37:05,000 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 10:37:05,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash 903650470, now seen corresponding path program 9 times [2024-05-12 10:37:05,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:05,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058864543] [2024-05-12 10:37:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:05,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058864543] [2024-05-12 10:37:05,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058864543] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:05,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:05,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555884654] [2024-05-12 10:37:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:05,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:05,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 295 transitions, 3346 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 10:37:05,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:05,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:05,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:06,184 INFO L124 PetriNetUnfolderBase]: 3809/6447 cut-off events. [2024-05-12 10:37:06,184 INFO L125 PetriNetUnfolderBase]: For 183540/183540 co-relation queries the response was YES. [2024-05-12 10:37:06,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34835 conditions, 6447 events. 3809/6447 cut-off events. For 183540/183540 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 45454 event pairs, 851 based on Foata normal form. 2/6429 useless extension candidates. Maximal degree in co-relation 34723. Up to 5362 conditions per place. [2024-05-12 10:37:06,261 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 240 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-05-12 10:37:06,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 325 transitions, 4036 flow [2024-05-12 10:37:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 10:37:06,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-05-12 10:37:06,262 INFO L175 Difference]: Start difference. First operand has 247 places, 295 transitions, 3346 flow. Second operand 9 states and 244 transitions. [2024-05-12 10:37:06,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 325 transitions, 4036 flow [2024-05-12 10:37:06,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 325 transitions, 3874 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:06,909 INFO L231 Difference]: Finished difference. Result has 252 places, 295 transitions, 3335 flow [2024-05-12 10:37:06,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3335, PETRI_PLACES=252, PETRI_TRANSITIONS=295} [2024-05-12 10:37:06,909 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-05-12 10:37:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 295 transitions, 3335 flow [2024-05-12 10:37:06,909 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 10:37:06,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:06,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:37:06,910 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 10:37:06,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 68442888, now seen corresponding path program 10 times [2024-05-12 10:37:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374928276] [2024-05-12 10:37:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:06,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:07,166 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 10:37:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374928276] [2024-05-12 10:37:07,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374928276] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:07,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:07,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939783464] [2024-05-12 10:37:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:07,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:07,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 295 transitions, 3335 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 10:37:07,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:07,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:07,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:08,101 INFO L124 PetriNetUnfolderBase]: 3803/6264 cut-off events. [2024-05-12 10:37:08,101 INFO L125 PetriNetUnfolderBase]: For 183866/183868 co-relation queries the response was YES. [2024-05-12 10:37:08,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34482 conditions, 6264 events. 3803/6264 cut-off events. For 183866/183868 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43259 event pairs, 696 based on Foata normal form. 4/6251 useless extension candidates. Maximal degree in co-relation 34369. Up to 5178 conditions per place. [2024-05-12 10:37:08,178 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 202 selfloop transitions, 123 changer transitions 0/338 dead transitions. [2024-05-12 10:37:08,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 338 transitions, 4207 flow [2024-05-12 10:37:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-05-12 10:37:08,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-05-12 10:37:08,179 INFO L175 Difference]: Start difference. First operand has 252 places, 295 transitions, 3335 flow. Second operand 8 states and 240 transitions. [2024-05-12 10:37:08,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 338 transitions, 4207 flow [2024-05-12 10:37:08,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 3971 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-05-12 10:37:08,754 INFO L231 Difference]: Finished difference. Result has 250 places, 295 transitions, 3364 flow [2024-05-12 10:37:08,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3364, PETRI_PLACES=250, PETRI_TRANSITIONS=295} [2024-05-12 10:37:08,755 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-05-12 10:37:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 295 transitions, 3364 flow [2024-05-12 10:37:08,755 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 10:37:08,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:08,756 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 10:37:08,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:37:08,756 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 10:37:08,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 275096328, now seen corresponding path program 11 times [2024-05-12 10:37:08,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569704378] [2024-05-12 10:37:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:08,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:09,009 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 10:37:09,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569704378] [2024-05-12 10:37:09,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569704378] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:09,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:09,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:09,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227838506] [2024-05-12 10:37:09,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:09,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:09,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 295 transitions, 3364 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 10:37:09,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:09,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:09,959 INFO L124 PetriNetUnfolderBase]: 3797/6499 cut-off events. [2024-05-12 10:37:09,959 INFO L125 PetriNetUnfolderBase]: For 185968/185968 co-relation queries the response was YES. [2024-05-12 10:37:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34792 conditions, 6499 events. 3797/6499 cut-off events. For 185968/185968 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46328 event pairs, 840 based on Foata normal form. 2/6484 useless extension candidates. Maximal degree in co-relation 34679. Up to 5173 conditions per place. [2024-05-12 10:37:10,037 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 207 selfloop transitions, 115 changer transitions 0/335 dead transitions. [2024-05-12 10:37:10,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 335 transitions, 4224 flow [2024-05-12 10:37:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-05-12 10:37:10,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:37:10,038 INFO L175 Difference]: Start difference. First operand has 250 places, 295 transitions, 3364 flow. Second operand 8 states and 236 transitions. [2024-05-12 10:37:10,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 335 transitions, 4224 flow [2024-05-12 10:37:10,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 335 transitions, 3907 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-05-12 10:37:10,710 INFO L231 Difference]: Finished difference. Result has 249 places, 295 transitions, 3303 flow [2024-05-12 10:37:10,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3303, PETRI_PLACES=249, PETRI_TRANSITIONS=295} [2024-05-12 10:37:10,710 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-05-12 10:37:10,710 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 295 transitions, 3303 flow [2024-05-12 10:37:10,710 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 10:37:10,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:10,711 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 10:37:10,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:37:10,711 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 10:37:10,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 275363238, now seen corresponding path program 12 times [2024-05-12 10:37:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540016496] [2024-05-12 10:37:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:10,965 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 10:37:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:10,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540016496] [2024-05-12 10:37:10,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540016496] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:10,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153849023] [2024-05-12 10:37:10,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:11,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:11,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 3303 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 10:37:11,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:11,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:11,846 INFO L124 PetriNetUnfolderBase]: 3789/6466 cut-off events. [2024-05-12 10:37:11,846 INFO L125 PetriNetUnfolderBase]: For 171352/171352 co-relation queries the response was YES. [2024-05-12 10:37:11,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34307 conditions, 6466 events. 3789/6466 cut-off events. For 171352/171352 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 45916 event pairs, 847 based on Foata normal form. 2/6448 useless extension candidates. Maximal degree in co-relation 34195. Up to 5165 conditions per place. [2024-05-12 10:37:11,921 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 206 selfloop transitions, 103 changer transitions 0/322 dead transitions. [2024-05-12 10:37:11,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 322 transitions, 3985 flow [2024-05-12 10:37:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:37:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:37:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:37:11,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-05-12 10:37:11,922 INFO L175 Difference]: Start difference. First operand has 249 places, 295 transitions, 3303 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:37:11,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 322 transitions, 3985 flow [2024-05-12 10:37:12,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 322 transitions, 3665 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-05-12 10:37:12,391 INFO L231 Difference]: Finished difference. Result has 244 places, 295 transitions, 3210 flow [2024-05-12 10:37:12,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3210, PETRI_PLACES=244, PETRI_TRANSITIONS=295} [2024-05-12 10:37:12,392 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-05-12 10:37:12,392 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 295 transitions, 3210 flow [2024-05-12 10:37:12,392 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 10:37:12,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:12,392 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 10:37:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:37:12,392 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 10:37:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 511517952, now seen corresponding path program 1 times [2024-05-12 10:37:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898690457] [2024-05-12 10:37:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:12,638 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 10:37:12,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:12,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898690457] [2024-05-12 10:37:12,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898690457] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:12,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:12,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:37:12,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34262527] [2024-05-12 10:37:12,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:12,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:37:12,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:37:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:37:12,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:37:12,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 295 transitions, 3210 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:12,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:12,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:37:12,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:13,477 INFO L124 PetriNetUnfolderBase]: 3637/6107 cut-off events. [2024-05-12 10:37:13,477 INFO L125 PetriNetUnfolderBase]: For 165843/165855 co-relation queries the response was YES. [2024-05-12 10:37:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32613 conditions, 6107 events. 3637/6107 cut-off events. For 165843/165855 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42629 event pairs, 648 based on Foata normal form. 16/6070 useless extension candidates. Maximal degree in co-relation 32503. Up to 4953 conditions per place. [2024-05-12 10:37:13,548 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 239 selfloop transitions, 28 changer transitions 0/324 dead transitions. [2024-05-12 10:37:13,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 324 transitions, 3842 flow [2024-05-12 10:37:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:37:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:37:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-05-12 10:37:13,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6723404255319149 [2024-05-12 10:37:13,549 INFO L175 Difference]: Start difference. First operand has 244 places, 295 transitions, 3210 flow. Second operand 5 states and 158 transitions. [2024-05-12 10:37:13,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 324 transitions, 3842 flow [2024-05-12 10:37:14,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 3611 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:14,018 INFO L231 Difference]: Finished difference. Result has 242 places, 296 transitions, 3060 flow [2024-05-12 10:37:14,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3060, PETRI_PLACES=242, PETRI_TRANSITIONS=296} [2024-05-12 10:37:14,019 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-05-12 10:37:14,019 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 296 transitions, 3060 flow [2024-05-12 10:37:14,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:14,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:14,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:37:14,019 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 10:37:14,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 512022942, now seen corresponding path program 2 times [2024-05-12 10:37:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568985531] [2024-05-12 10:37:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:14,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:14,268 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 10:37:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:14,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568985531] [2024-05-12 10:37:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568985531] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:14,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:37:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289431511] [2024-05-12 10:37:14,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:14,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:37:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:37:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:37:14,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:37:14,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 296 transitions, 3060 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:14,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:37:14,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:15,097 INFO L124 PetriNetUnfolderBase]: 3666/6063 cut-off events. [2024-05-12 10:37:15,097 INFO L125 PetriNetUnfolderBase]: For 154491/154511 co-relation queries the response was YES. [2024-05-12 10:37:15,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32107 conditions, 6063 events. 3666/6063 cut-off events. For 154491/154511 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42197 event pairs, 515 based on Foata normal form. 26/6033 useless extension candidates. Maximal degree in co-relation 31998. Up to 4764 conditions per place. [2024-05-12 10:37:15,169 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 241 selfloop transitions, 25 changer transitions 0/323 dead transitions. [2024-05-12 10:37:15,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 323 transitions, 3806 flow [2024-05-12 10:37:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:37:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:37:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 10:37:15,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468085106382979 [2024-05-12 10:37:15,170 INFO L175 Difference]: Start difference. First operand has 242 places, 296 transitions, 3060 flow. Second operand 5 states and 152 transitions. [2024-05-12 10:37:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 323 transitions, 3806 flow [2024-05-12 10:37:15,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 323 transitions, 3755 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:37:15,795 INFO L231 Difference]: Finished difference. Result has 244 places, 297 transitions, 3077 flow [2024-05-12 10:37:15,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3077, PETRI_PLACES=244, PETRI_TRANSITIONS=297} [2024-05-12 10:37:15,796 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-05-12 10:37:15,796 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 297 transitions, 3077 flow [2024-05-12 10:37:15,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:15,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:15,796 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 10:37:15,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:37:15,797 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:15,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:15,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2140874280, now seen corresponding path program 1 times [2024-05-12 10:37:15,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:15,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895919602] [2024-05-12 10:37:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:15,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895919602] [2024-05-12 10:37:16,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895919602] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:16,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:16,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580226472] [2024-05-12 10:37:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:16,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:16,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:16,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:16,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 297 transitions, 3077 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 10:37:16,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:16,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:16,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:16,978 INFO L124 PetriNetUnfolderBase]: 3863/6492 cut-off events. [2024-05-12 10:37:16,978 INFO L125 PetriNetUnfolderBase]: For 153861/153861 co-relation queries the response was YES. [2024-05-12 10:37:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33860 conditions, 6492 events. 3863/6492 cut-off events. For 153861/153861 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 45783 event pairs, 1279 based on Foata normal form. 2/6441 useless extension candidates. Maximal degree in co-relation 33750. Up to 5648 conditions per place. [2024-05-12 10:37:17,057 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 290 selfloop transitions, 31 changer transitions 0/334 dead transitions. [2024-05-12 10:37:17,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 334 transitions, 4005 flow [2024-05-12 10:37:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:37:17,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:37:17,059 INFO L175 Difference]: Start difference. First operand has 244 places, 297 transitions, 3077 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:37:17,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 334 transitions, 4005 flow [2024-05-12 10:37:17,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 334 transitions, 3961 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 10:37:17,475 INFO L231 Difference]: Finished difference. Result has 249 places, 301 transitions, 3200 flow [2024-05-12 10:37:17,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3200, PETRI_PLACES=249, PETRI_TRANSITIONS=301} [2024-05-12 10:37:17,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-05-12 10:37:17,476 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 301 transitions, 3200 flow [2024-05-12 10:37:17,476 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 10:37:17,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:17,476 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 10:37:17,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:37:17,477 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 10:37:17,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1134562470, now seen corresponding path program 2 times [2024-05-12 10:37:17,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:17,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460023624] [2024-05-12 10:37:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:17,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:17,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460023624] [2024-05-12 10:37:17,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460023624] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:17,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:17,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045231462] [2024-05-12 10:37:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:17,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:17,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 301 transitions, 3200 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 10:37:17,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:17,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:17,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:18,612 INFO L124 PetriNetUnfolderBase]: 3881/6354 cut-off events. [2024-05-12 10:37:18,612 INFO L125 PetriNetUnfolderBase]: For 157967/157967 co-relation queries the response was YES. [2024-05-12 10:37:18,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33899 conditions, 6354 events. 3881/6354 cut-off events. For 157967/157967 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43814 event pairs, 674 based on Foata normal form. 2/6352 useless extension candidates. Maximal degree in co-relation 33788. Up to 5729 conditions per place. [2024-05-12 10:37:18,686 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 290 selfloop transitions, 28 changer transitions 0/331 dead transitions. [2024-05-12 10:37:18,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 331 transitions, 3952 flow [2024-05-12 10:37:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:37:18,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805471124620061 [2024-05-12 10:37:18,687 INFO L175 Difference]: Start difference. First operand has 249 places, 301 transitions, 3200 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:37:18,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 331 transitions, 3952 flow [2024-05-12 10:37:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 331 transitions, 3842 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-05-12 10:37:19,197 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 3207 flow [2024-05-12 10:37:19,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2024-05-12 10:37:19,197 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 202 predicate places. [2024-05-12 10:37:19,197 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 3207 flow [2024-05-12 10:37:19,197 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 10:37:19,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:19,197 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 10:37:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:37:19,198 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 10:37:19,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1249853640, now seen corresponding path program 3 times [2024-05-12 10:37:19,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:19,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522412857] [2024-05-12 10:37:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:19,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:19,461 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 10:37:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522412857] [2024-05-12 10:37:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522412857] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054958865] [2024-05-12 10:37:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:19,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:19,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 3207 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 10:37:19,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:19,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:19,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:20,352 INFO L124 PetriNetUnfolderBase]: 3899/6380 cut-off events. [2024-05-12 10:37:20,353 INFO L125 PetriNetUnfolderBase]: For 161867/161867 co-relation queries the response was YES. [2024-05-12 10:37:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33973 conditions, 6380 events. 3899/6380 cut-off events. For 161867/161867 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44082 event pairs, 674 based on Foata normal form. 2/6378 useless extension candidates. Maximal degree in co-relation 33860. Up to 5782 conditions per place. [2024-05-12 10:37:20,428 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 297 selfloop transitions, 20 changer transitions 0/330 dead transitions. [2024-05-12 10:37:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 330 transitions, 3935 flow [2024-05-12 10:37:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:37:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683890577507599 [2024-05-12 10:37:20,429 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 3207 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:37:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 330 transitions, 3935 flow [2024-05-12 10:37:21,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 330 transitions, 3856 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:21,017 INFO L231 Difference]: Finished difference. Result has 255 places, 305 transitions, 3215 flow [2024-05-12 10:37:21,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3215, PETRI_PLACES=255, PETRI_TRANSITIONS=305} [2024-05-12 10:37:21,018 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-05-12 10:37:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 305 transitions, 3215 flow [2024-05-12 10:37:21,018 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 10:37:21,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:21,018 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 10:37:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:37:21,018 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 10:37:21,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1250038338, now seen corresponding path program 1 times [2024-05-12 10:37:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:21,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550664790] [2024-05-12 10:37:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:21,278 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 10:37:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550664790] [2024-05-12 10:37:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550664790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:21,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:21,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982949713] [2024-05-12 10:37:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:21,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:21,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 305 transitions, 3215 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 10:37:21,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:21,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:21,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:22,194 INFO L124 PetriNetUnfolderBase]: 3935/6659 cut-off events. [2024-05-12 10:37:22,194 INFO L125 PetriNetUnfolderBase]: For 172092/172092 co-relation queries the response was YES. [2024-05-12 10:37:22,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 6659 events. 3935/6659 cut-off events. For 172092/172092 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 47267 event pairs, 873 based on Foata normal form. 4/6643 useless extension candidates. Maximal degree in co-relation 34420. Up to 5618 conditions per place. [2024-05-12 10:37:22,273 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 265 selfloop transitions, 55 changer transitions 0/333 dead transitions. [2024-05-12 10:37:22,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 333 transitions, 3967 flow [2024-05-12 10:37:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:37:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5927051671732523 [2024-05-12 10:37:22,274 INFO L175 Difference]: Start difference. First operand has 255 places, 305 transitions, 3215 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:37:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 333 transitions, 3967 flow [2024-05-12 10:37:22,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 333 transitions, 3900 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:22,854 INFO L231 Difference]: Finished difference. Result has 257 places, 308 transitions, 3326 flow [2024-05-12 10:37:22,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3326, PETRI_PLACES=257, PETRI_TRANSITIONS=308} [2024-05-12 10:37:22,854 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 206 predicate places. [2024-05-12 10:37:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 308 transitions, 3326 flow [2024-05-12 10:37:22,854 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 10:37:22,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:22,854 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 10:37:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:37:22,855 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 10:37:22,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 275373158, now seen corresponding path program 4 times [2024-05-12 10:37:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089566513] [2024-05-12 10:37:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:23,126 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 10:37:23,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:23,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089566513] [2024-05-12 10:37:23,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089566513] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:23,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:23,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:23,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574257545] [2024-05-12 10:37:23,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:23,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:23,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 308 transitions, 3326 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 10:37:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:24,024 INFO L124 PetriNetUnfolderBase]: 3930/6425 cut-off events. [2024-05-12 10:37:24,024 INFO L125 PetriNetUnfolderBase]: For 169245/169245 co-relation queries the response was YES. [2024-05-12 10:37:24,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34539 conditions, 6425 events. 3930/6425 cut-off events. For 169245/169245 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 44271 event pairs, 626 based on Foata normal form. 2/6423 useless extension candidates. Maximal degree in co-relation 34424. Up to 5767 conditions per place. [2024-05-12 10:37:24,100 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 294 selfloop transitions, 29 changer transitions 0/336 dead transitions. [2024-05-12 10:37:24,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 336 transitions, 4038 flow [2024-05-12 10:37:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:37:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:37:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:37:24,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6099290780141844 [2024-05-12 10:37:24,109 INFO L175 Difference]: Start difference. First operand has 257 places, 308 transitions, 3326 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:37:24,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 336 transitions, 4038 flow [2024-05-12 10:37:24,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 336 transitions, 3858 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:24,640 INFO L231 Difference]: Finished difference. Result has 258 places, 308 transitions, 3215 flow [2024-05-12 10:37:24,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3215, PETRI_PLACES=258, PETRI_TRANSITIONS=308} [2024-05-12 10:37:24,640 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 207 predicate places. [2024-05-12 10:37:24,640 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 308 transitions, 3215 flow [2024-05-12 10:37:24,641 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 10:37:24,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:24,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:37:24,641 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 10:37:24,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1493871074, now seen corresponding path program 2 times [2024-05-12 10:37:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203996987] [2024-05-12 10:37:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203996987] [2024-05-12 10:37:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203996987] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:24,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403301138] [2024-05-12 10:37:24,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:24,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:24,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:24,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 308 transitions, 3215 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 10:37:24,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:24,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:24,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:25,730 INFO L124 PetriNetUnfolderBase]: 3966/6497 cut-off events. [2024-05-12 10:37:25,730 INFO L125 PetriNetUnfolderBase]: For 178102/178104 co-relation queries the response was YES. [2024-05-12 10:37:25,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 6497 events. 3966/6497 cut-off events. For 178102/178104 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45065 event pairs, 746 based on Foata normal form. 6/6483 useless extension candidates. Maximal degree in co-relation 34455. Up to 5663 conditions per place. [2024-05-12 10:37:25,806 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 260 selfloop transitions, 57 changer transitions 0/330 dead transitions. [2024-05-12 10:37:25,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 330 transitions, 3953 flow [2024-05-12 10:37:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:37:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:37:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-05-12 10:37:25,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921985815602837 [2024-05-12 10:37:25,807 INFO L175 Difference]: Start difference. First operand has 258 places, 308 transitions, 3215 flow. Second operand 6 states and 167 transitions. [2024-05-12 10:37:25,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 330 transitions, 3953 flow [2024-05-12 10:37:26,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 330 transitions, 3886 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:26,336 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 3336 flow [2024-05-12 10:37:26,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3336, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-05-12 10:37:26,336 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 208 predicate places. [2024-05-12 10:37:26,336 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 3336 flow [2024-05-12 10:37:26,337 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 10:37:26,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:26,337 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 10:37:26,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:37:26,337 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 10:37:26,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1487614964, now seen corresponding path program 3 times [2024-05-12 10:37:26,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:26,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174088324] [2024-05-12 10:37:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:26,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:26,589 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 10:37:26,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:26,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174088324] [2024-05-12 10:37:26,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174088324] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:26,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:26,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:26,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414554752] [2024-05-12 10:37:26,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:26,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:26,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:26,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:26,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:26,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:26,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 3336 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 10:37:26,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:26,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:26,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:27,456 INFO L124 PetriNetUnfolderBase]: 4002/6534 cut-off events. [2024-05-12 10:37:27,456 INFO L125 PetriNetUnfolderBase]: For 180708/180708 co-relation queries the response was YES. [2024-05-12 10:37:27,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35341 conditions, 6534 events. 4002/6534 cut-off events. For 180708/180708 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45204 event pairs, 705 based on Foata normal form. 4/6528 useless extension candidates. Maximal degree in co-relation 35224. Up to 5687 conditions per place. [2024-05-12 10:37:27,535 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 263 selfloop transitions, 60 changer transitions 0/336 dead transitions. [2024-05-12 10:37:27,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 336 transitions, 4100 flow [2024-05-12 10:37:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:37:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:37:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:37:27,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:37:27,536 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 3336 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:37:27,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 336 transitions, 4100 flow [2024-05-12 10:37:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 336 transitions, 3934 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:28,184 INFO L231 Difference]: Finished difference. Result has 261 places, 314 transitions, 3374 flow [2024-05-12 10:37:28,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3374, PETRI_PLACES=261, PETRI_TRANSITIONS=314} [2024-05-12 10:37:28,184 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-05-12 10:37:28,184 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 314 transitions, 3374 flow [2024-05-12 10:37:28,185 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 10:37:28,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:28,185 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 10:37:28,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:37:28,185 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 10:37:28,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash 512029886, now seen corresponding path program 4 times [2024-05-12 10:37:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:28,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118834149] [2024-05-12 10:37:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:28,443 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 10:37:28,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118834149] [2024-05-12 10:37:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118834149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:28,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043141675] [2024-05-12 10:37:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:28,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:28,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 314 transitions, 3374 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 10:37:28,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:28,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:28,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:29,288 INFO L124 PetriNetUnfolderBase]: 4015/6575 cut-off events. [2024-05-12 10:37:29,289 INFO L125 PetriNetUnfolderBase]: For 183332/183334 co-relation queries the response was YES. [2024-05-12 10:37:29,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35483 conditions, 6575 events. 4015/6575 cut-off events. For 183332/183334 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45649 event pairs, 725 based on Foata normal form. 6/6561 useless extension candidates. Maximal degree in co-relation 35365. Up to 5614 conditions per place. [2024-05-12 10:37:29,359 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 258 selfloop transitions, 68 changer transitions 0/339 dead transitions. [2024-05-12 10:37:29,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 339 transitions, 4175 flow [2024-05-12 10:37:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:37:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:37:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 10:37:29,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:37:29,360 INFO L175 Difference]: Start difference. First operand has 261 places, 314 transitions, 3374 flow. Second operand 6 states and 168 transitions. [2024-05-12 10:37:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 339 transitions, 4175 flow [2024-05-12 10:37:30,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 339 transitions, 3991 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:30,085 INFO L231 Difference]: Finished difference. Result has 264 places, 319 transitions, 3461 flow [2024-05-12 10:37:30,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3461, PETRI_PLACES=264, PETRI_TRANSITIONS=319} [2024-05-12 10:37:30,085 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 213 predicate places. [2024-05-12 10:37:30,086 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 319 transitions, 3461 flow [2024-05-12 10:37:30,086 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 10:37:30,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:30,086 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 10:37:30,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:37:30,086 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:30,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:30,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1012830647, now seen corresponding path program 1 times [2024-05-12 10:37:30,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:30,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079841082] [2024-05-12 10:37:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:30,156 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 10:37:30,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079841082] [2024-05-12 10:37:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079841082] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:30,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:30,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:37:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719679212] [2024-05-12 10:37:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:30,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:37:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:37:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:37:30,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2024-05-12 10:37:30,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 319 transitions, 3461 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:30,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:30,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2024-05-12 10:37:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:30,909 INFO L124 PetriNetUnfolderBase]: 2580/5678 cut-off events. [2024-05-12 10:37:30,909 INFO L125 PetriNetUnfolderBase]: For 92338/92484 co-relation queries the response was YES. [2024-05-12 10:37:30,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22622 conditions, 5678 events. 2580/5678 cut-off events. For 92338/92484 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50091 event pairs, 364 based on Foata normal form. 255/5539 useless extension candidates. Maximal degree in co-relation 22502. Up to 2229 conditions per place. [2024-05-12 10:37:30,977 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 32 selfloop transitions, 78 changer transitions 0/336 dead transitions. [2024-05-12 10:37:30,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 336 transitions, 3783 flow [2024-05-12 10:37:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:37:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:37:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-05-12 10:37:30,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7393617021276596 [2024-05-12 10:37:30,978 INFO L175 Difference]: Start difference. First operand has 264 places, 319 transitions, 3461 flow. Second operand 4 states and 139 transitions. [2024-05-12 10:37:30,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 336 transitions, 3783 flow [2024-05-12 10:37:31,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 336 transitions, 3635 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-05-12 10:37:31,318 INFO L231 Difference]: Finished difference. Result has 267 places, 323 transitions, 3675 flow [2024-05-12 10:37:31,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3675, PETRI_PLACES=267, PETRI_TRANSITIONS=323} [2024-05-12 10:37:31,318 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 216 predicate places. [2024-05-12 10:37:31,318 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 323 transitions, 3675 flow [2024-05-12 10:37:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:31,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:31,319 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 10:37:31,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:37:31,319 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 10:37:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash -95434063, now seen corresponding path program 1 times [2024-05-12 10:37:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554056401] [2024-05-12 10:37:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:31,618 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 10:37:31,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554056401] [2024-05-12 10:37:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554056401] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:31,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535935505] [2024-05-12 10:37:31,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:31,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:31,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:31,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:31,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 323 transitions, 3675 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:31,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:31,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:31,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:32,710 INFO L124 PetriNetUnfolderBase]: 4287/7291 cut-off events. [2024-05-12 10:37:32,711 INFO L125 PetriNetUnfolderBase]: For 255385/255415 co-relation queries the response was YES. [2024-05-12 10:37:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42177 conditions, 7291 events. 4287/7291 cut-off events. For 255385/255415 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52755 event pairs, 1354 based on Foata normal form. 12/7014 useless extension candidates. Maximal degree in co-relation 42054. Up to 5822 conditions per place. [2024-05-12 10:37:32,803 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 233 selfloop transitions, 111 changer transitions 0/358 dead transitions. [2024-05-12 10:37:32,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 358 transitions, 4737 flow [2024-05-12 10:37:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:37:32,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877659574468085 [2024-05-12 10:37:32,804 INFO L175 Difference]: Start difference. First operand has 267 places, 323 transitions, 3675 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:37:32,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 358 transitions, 4737 flow [2024-05-12 10:37:33,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 358 transitions, 4735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:37:33,511 INFO L231 Difference]: Finished difference. Result has 275 places, 327 transitions, 4025 flow [2024-05-12 10:37:33,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4025, PETRI_PLACES=275, PETRI_TRANSITIONS=327} [2024-05-12 10:37:33,511 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 224 predicate places. [2024-05-12 10:37:33,511 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 327 transitions, 4025 flow [2024-05-12 10:37:33,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:33,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:33,512 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] [2024-05-12 10:37:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:37:33,512 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 10:37:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1942591967, now seen corresponding path program 2 times [2024-05-12 10:37:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578935772] [2024-05-12 10:37:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:33,772 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 10:37:33,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:33,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578935772] [2024-05-12 10:37:33,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578935772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:33,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:33,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541721248] [2024-05-12 10:37:33,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:33,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:33,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:33,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:33,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 327 transitions, 4025 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:35,161 INFO L124 PetriNetUnfolderBase]: 4624/7881 cut-off events. [2024-05-12 10:37:35,161 INFO L125 PetriNetUnfolderBase]: For 321689/321725 co-relation queries the response was YES. [2024-05-12 10:37:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48534 conditions, 7881 events. 4624/7881 cut-off events. For 321689/321725 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58036 event pairs, 1303 based on Foata normal form. 12/7594 useless extension candidates. Maximal degree in co-relation 48408. Up to 5449 conditions per place. [2024-05-12 10:37:35,250 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 240 selfloop transitions, 119 changer transitions 0/373 dead transitions. [2024-05-12 10:37:35,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 5351 flow [2024-05-12 10:37:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:37:35,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090425531914894 [2024-05-12 10:37:35,251 INFO L175 Difference]: Start difference. First operand has 275 places, 327 transitions, 4025 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:37:35,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 5351 flow [2024-05-12 10:37:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 373 transitions, 5167 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:36,247 INFO L231 Difference]: Finished difference. Result has 280 places, 332 transitions, 4240 flow [2024-05-12 10:37:36,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4240, PETRI_PLACES=280, PETRI_TRANSITIONS=332} [2024-05-12 10:37:36,248 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 229 predicate places. [2024-05-12 10:37:36,248 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 332 transitions, 4240 flow [2024-05-12 10:37:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:36,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:36,248 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 10:37:36,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:37:36,248 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 10:37:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1853878337, now seen corresponding path program 3 times [2024-05-12 10:37:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845597030] [2024-05-12 10:37:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:36,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845597030] [2024-05-12 10:37:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845597030] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:36,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:36,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951597137] [2024-05-12 10:37:36,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:36,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:36,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:36,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 332 transitions, 4240 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:36,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:36,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:36,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:37,734 INFO L124 PetriNetUnfolderBase]: 4680/8004 cut-off events. [2024-05-12 10:37:37,735 INFO L125 PetriNetUnfolderBase]: For 323050/323086 co-relation queries the response was YES. [2024-05-12 10:37:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49061 conditions, 8004 events. 4680/8004 cut-off events. For 323050/323086 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59275 event pairs, 1618 based on Foata normal form. 16/7709 useless extension candidates. Maximal degree in co-relation 48932. Up to 6738 conditions per place. [2024-05-12 10:37:37,843 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 230 selfloop transitions, 114 changer transitions 0/358 dead transitions. [2024-05-12 10:37:37,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 358 transitions, 5071 flow [2024-05-12 10:37:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 10:37:37,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 10:37:37,844 INFO L175 Difference]: Start difference. First operand has 280 places, 332 transitions, 4240 flow. Second operand 8 states and 216 transitions. [2024-05-12 10:37:37,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 358 transitions, 5071 flow [2024-05-12 10:37:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 358 transitions, 4879 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 10:37:38,800 INFO L231 Difference]: Finished difference. Result has 285 places, 334 transitions, 4343 flow [2024-05-12 10:37:38,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4343, PETRI_PLACES=285, PETRI_TRANSITIONS=334} [2024-05-12 10:37:38,800 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 234 predicate places. [2024-05-12 10:37:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 334 transitions, 4343 flow [2024-05-12 10:37:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:38,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:38,801 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 10:37:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:37:38,801 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 10:37:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 96268699, now seen corresponding path program 4 times [2024-05-12 10:37:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000508852] [2024-05-12 10:37:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:39,079 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 10:37:39,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000508852] [2024-05-12 10:37:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000508852] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:39,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:39,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:39,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416906320] [2024-05-12 10:37:39,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:39,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:39,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:39,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:39,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:39,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 334 transitions, 4343 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:39,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:39,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:39,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:40,392 INFO L124 PetriNetUnfolderBase]: 4828/8227 cut-off events. [2024-05-12 10:37:40,392 INFO L125 PetriNetUnfolderBase]: For 335010/335061 co-relation queries the response was YES. [2024-05-12 10:37:40,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50532 conditions, 8227 events. 4828/8227 cut-off events. For 335010/335061 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 61001 event pairs, 1635 based on Foata normal form. 16/7914 useless extension candidates. Maximal degree in co-relation 50401. Up to 7084 conditions per place. [2024-05-12 10:37:40,501 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 267 selfloop transitions, 78 changer transitions 0/359 dead transitions. [2024-05-12 10:37:40,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 359 transitions, 5175 flow [2024-05-12 10:37:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 10:37:40,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2024-05-12 10:37:40,503 INFO L175 Difference]: Start difference. First operand has 285 places, 334 transitions, 4343 flow. Second operand 10 states and 256 transitions. [2024-05-12 10:37:40,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 359 transitions, 5175 flow [2024-05-12 10:37:41,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 359 transitions, 4913 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:41,587 INFO L231 Difference]: Finished difference. Result has 289 places, 336 transitions, 4307 flow [2024-05-12 10:37:41,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4307, PETRI_PLACES=289, PETRI_TRANSITIONS=336} [2024-05-12 10:37:41,588 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-05-12 10:37:41,588 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 336 transitions, 4307 flow [2024-05-12 10:37:41,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:41,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:41,588 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 10:37:41,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:37:41,589 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 10:37:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1720147933, now seen corresponding path program 5 times [2024-05-12 10:37:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648967391] [2024-05-12 10:37:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:41,857 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 10:37:41,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648967391] [2024-05-12 10:37:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648967391] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:41,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:41,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:41,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421551538] [2024-05-12 10:37:41,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:41,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:41,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:41,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:41,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 336 transitions, 4307 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:41,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:41,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:41,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:43,281 INFO L124 PetriNetUnfolderBase]: 4976/8490 cut-off events. [2024-05-12 10:37:43,282 INFO L125 PetriNetUnfolderBase]: For 347263/347308 co-relation queries the response was YES. [2024-05-12 10:37:43,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51931 conditions, 8490 events. 4976/8490 cut-off events. For 347263/347308 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 63576 event pairs, 1702 based on Foata normal form. 16/8169 useless extension candidates. Maximal degree in co-relation 51799. Up to 7312 conditions per place. [2024-05-12 10:37:43,383 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 273 selfloop transitions, 72 changer transitions 0/359 dead transitions. [2024-05-12 10:37:43,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 359 transitions, 5139 flow [2024-05-12 10:37:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:37:43,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-05-12 10:37:43,384 INFO L175 Difference]: Start difference. First operand has 289 places, 336 transitions, 4307 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:37:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 359 transitions, 5139 flow [2024-05-12 10:37:44,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 359 transitions, 4943 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-05-12 10:37:44,276 INFO L231 Difference]: Finished difference. Result has 289 places, 338 transitions, 4329 flow [2024-05-12 10:37:44,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4329, PETRI_PLACES=289, PETRI_TRANSITIONS=338} [2024-05-12 10:37:44,277 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-05-12 10:37:44,277 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 338 transitions, 4329 flow [2024-05-12 10:37:44,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:44,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:44,277 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 10:37:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:37:44,278 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 10:37:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1720000063, now seen corresponding path program 6 times [2024-05-12 10:37:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086738579] [2024-05-12 10:37:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:44,549 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 10:37:44,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:44,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086738579] [2024-05-12 10:37:44,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086738579] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:44,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:44,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446853540] [2024-05-12 10:37:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:44,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:44,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 338 transitions, 4329 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:44,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:44,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:44,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:45,977 INFO L124 PetriNetUnfolderBase]: 5207/8874 cut-off events. [2024-05-12 10:37:45,977 INFO L125 PetriNetUnfolderBase]: For 378764/378815 co-relation queries the response was YES. [2024-05-12 10:37:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55211 conditions, 8874 events. 5207/8874 cut-off events. For 378764/378815 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 67043 event pairs, 1719 based on Foata normal form. 12/8538 useless extension candidates. Maximal degree in co-relation 55078. Up to 7110 conditions per place. [2024-05-12 10:37:46,102 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 284 selfloop transitions, 71 changer transitions 0/369 dead transitions. [2024-05-12 10:37:46,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 369 transitions, 5413 flow [2024-05-12 10:37:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 10:37:46,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771276595744681 [2024-05-12 10:37:46,103 INFO L175 Difference]: Start difference. First operand has 289 places, 338 transitions, 4329 flow. Second operand 8 states and 217 transitions. [2024-05-12 10:37:46,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 369 transitions, 5413 flow [2024-05-12 10:37:47,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 369 transitions, 5225 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:47,385 INFO L231 Difference]: Finished difference. Result has 292 places, 342 transitions, 4444 flow [2024-05-12 10:37:47,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=292, PETRI_TRANSITIONS=342} [2024-05-12 10:37:47,386 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 241 predicate places. [2024-05-12 10:37:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 342 transitions, 4444 flow [2024-05-12 10:37:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:47,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:47,386 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 10:37:47,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:37:47,387 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 10:37:47,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1725725515, now seen corresponding path program 1 times [2024-05-12 10:37:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:47,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820536762] [2024-05-12 10:37:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:47,651 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 10:37:47,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820536762] [2024-05-12 10:37:47,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820536762] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:47,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:47,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521815435] [2024-05-12 10:37:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:47,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:47,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:47,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 342 transitions, 4444 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:47,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:47,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:47,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:49,136 INFO L124 PetriNetUnfolderBase]: 5313/9084 cut-off events. [2024-05-12 10:37:49,137 INFO L125 PetriNetUnfolderBase]: For 391570/391624 co-relation queries the response was YES. [2024-05-12 10:37:49,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56417 conditions, 9084 events. 5313/9084 cut-off events. For 391570/391624 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 69146 event pairs, 1792 based on Foata normal form. 12/8739 useless extension candidates. Maximal degree in co-relation 56282. Up to 7521 conditions per place. [2024-05-12 10:37:49,269 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 273 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2024-05-12 10:37:49,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 372 transitions, 5336 flow [2024-05-12 10:37:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-05-12 10:37:49,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-05-12 10:37:49,270 INFO L175 Difference]: Start difference. First operand has 292 places, 342 transitions, 4444 flow. Second operand 10 states and 260 transitions. [2024-05-12 10:37:49,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 372 transitions, 5336 flow [2024-05-12 10:37:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 372 transitions, 5186 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:50,399 INFO L231 Difference]: Finished difference. Result has 298 places, 344 transitions, 4539 flow [2024-05-12 10:37:50,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4539, PETRI_PLACES=298, PETRI_TRANSITIONS=344} [2024-05-12 10:37:50,399 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 247 predicate places. [2024-05-12 10:37:50,399 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 344 transitions, 4539 flow [2024-05-12 10:37:50,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:50,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:50,400 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 10:37:50,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:37:50,400 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 10:37:50,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -47855171, now seen corresponding path program 7 times [2024-05-12 10:37:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:50,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729100433] [2024-05-12 10:37:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:50,674 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 10:37:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729100433] [2024-05-12 10:37:50,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729100433] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:50,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:50,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887809383] [2024-05-12 10:37:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:50,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:50,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:50,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:50,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 344 transitions, 4539 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:50,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:50,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:50,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:52,166 INFO L124 PetriNetUnfolderBase]: 5461/9313 cut-off events. [2024-05-12 10:37:52,166 INFO L125 PetriNetUnfolderBase]: For 415392/415458 co-relation queries the response was YES. [2024-05-12 10:37:52,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58240 conditions, 9313 events. 5461/9313 cut-off events. For 415392/415458 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 71147 event pairs, 1881 based on Foata normal form. 16/8956 useless extension candidates. Maximal degree in co-relation 58103. Up to 7815 conditions per place. [2024-05-12 10:37:52,302 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 236 selfloop transitions, 121 changer transitions 0/371 dead transitions. [2024-05-12 10:37:52,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 371 transitions, 5415 flow [2024-05-12 10:37:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 10:37:52,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-05-12 10:37:52,303 INFO L175 Difference]: Start difference. First operand has 298 places, 344 transitions, 4539 flow. Second operand 9 states and 237 transitions. [2024-05-12 10:37:52,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 371 transitions, 5415 flow [2024-05-12 10:37:53,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 371 transitions, 5194 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-05-12 10:37:53,686 INFO L231 Difference]: Finished difference. Result has 299 places, 346 transitions, 4648 flow [2024-05-12 10:37:53,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4648, PETRI_PLACES=299, PETRI_TRANSITIONS=346} [2024-05-12 10:37:53,686 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 248 predicate places. [2024-05-12 10:37:53,687 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 346 transitions, 4648 flow [2024-05-12 10:37:53,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:53,687 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 10:37:53,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:37:53,687 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 10:37:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -53217551, now seen corresponding path program 8 times [2024-05-12 10:37:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:53,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098231588] [2024-05-12 10:37:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098231588] [2024-05-12 10:37:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098231588] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:53,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:53,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434636685] [2024-05-12 10:37:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:53,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:53,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 346 transitions, 4648 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:53,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:55,506 INFO L124 PetriNetUnfolderBase]: 5609/9562 cut-off events. [2024-05-12 10:37:55,506 INFO L125 PetriNetUnfolderBase]: For 434926/434986 co-relation queries the response was YES. [2024-05-12 10:37:55,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60173 conditions, 9562 events. 5609/9562 cut-off events. For 434926/434986 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 73277 event pairs, 1918 based on Foata normal form. 16/9199 useless extension candidates. Maximal degree in co-relation 60035. Up to 8043 conditions per place. [2024-05-12 10:37:55,637 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 248 selfloop transitions, 109 changer transitions 0/371 dead transitions. [2024-05-12 10:37:55,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 371 transitions, 5524 flow [2024-05-12 10:37:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:37:55,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-05-12 10:37:55,638 INFO L175 Difference]: Start difference. First operand has 299 places, 346 transitions, 4648 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:37:55,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 371 transitions, 5524 flow [2024-05-12 10:37:57,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 371 transitions, 5238 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:57,229 INFO L231 Difference]: Finished difference. Result has 299 places, 348 transitions, 4672 flow [2024-05-12 10:37:57,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4672, PETRI_PLACES=299, PETRI_TRANSITIONS=348} [2024-05-12 10:37:57,230 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 248 predicate places. [2024-05-12 10:37:57,230 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 348 transitions, 4672 flow [2024-05-12 10:37:57,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:57,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:57,230 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 10:37:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:37:57,230 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 10:37:57,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -934851077, now seen corresponding path program 9 times [2024-05-12 10:37:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:57,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471427601] [2024-05-12 10:37:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:57,494 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 10:37:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471427601] [2024-05-12 10:37:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471427601] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:57,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:57,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490651981] [2024-05-12 10:37:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:57,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:37:57,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 348 transitions, 4672 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:57,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:57,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:37:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:59,158 INFO L124 PetriNetUnfolderBase]: 5731/9782 cut-off events. [2024-05-12 10:37:59,158 INFO L125 PetriNetUnfolderBase]: For 443753/443850 co-relation queries the response was YES. [2024-05-12 10:37:59,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61322 conditions, 9782 events. 5731/9782 cut-off events. For 443753/443850 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75679 event pairs, 1996 based on Foata normal form. 36/9430 useless extension candidates. Maximal degree in co-relation 61183. Up to 8393 conditions per place. [2024-05-12 10:37:59,285 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 238 selfloop transitions, 120 changer transitions 0/372 dead transitions. [2024-05-12 10:37:59,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 372 transitions, 5550 flow [2024-05-12 10:37:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 10:37:59,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-05-12 10:37:59,287 INFO L175 Difference]: Start difference. First operand has 299 places, 348 transitions, 4672 flow. Second operand 9 states and 234 transitions. [2024-05-12 10:37:59,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 372 transitions, 5550 flow [2024-05-12 10:38:00,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 372 transitions, 5284 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 10:38:00,471 INFO L231 Difference]: Finished difference. Result has 303 places, 350 transitions, 4738 flow [2024-05-12 10:38:00,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4738, PETRI_PLACES=303, PETRI_TRANSITIONS=350} [2024-05-12 10:38:00,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 252 predicate places. [2024-05-12 10:38:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 350 transitions, 4738 flow [2024-05-12 10:38:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:00,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:00,472 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 10:38:00,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:38:00,472 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 10:38:00,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash -53365421, now seen corresponding path program 10 times [2024-05-12 10:38:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839658681] [2024-05-12 10:38:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:00,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:00,740 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 10:38:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839658681] [2024-05-12 10:38:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839658681] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:00,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930833454] [2024-05-12 10:38:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:00,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:00,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 350 transitions, 4738 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:00,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:00,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:02,597 INFO L124 PetriNetUnfolderBase]: 5778/9895 cut-off events. [2024-05-12 10:38:02,598 INFO L125 PetriNetUnfolderBase]: For 420656/420713 co-relation queries the response was YES. [2024-05-12 10:38:02,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60814 conditions, 9895 events. 5778/9895 cut-off events. For 420656/420713 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 76792 event pairs, 1679 based on Foata normal form. 12/9534 useless extension candidates. Maximal degree in co-relation 60674. Up to 6846 conditions per place. [2024-05-12 10:38:02,734 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 254 selfloop transitions, 117 changer transitions 0/385 dead transitions. [2024-05-12 10:38:02,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 385 transitions, 5868 flow [2024-05-12 10:38:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:38:02,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139817629179332 [2024-05-12 10:38:02,737 INFO L175 Difference]: Start difference. First operand has 303 places, 350 transitions, 4738 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:38:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 385 transitions, 5868 flow [2024-05-12 10:38:04,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 385 transitions, 5566 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:04,125 INFO L231 Difference]: Finished difference. Result has 304 places, 353 transitions, 4857 flow [2024-05-12 10:38:04,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4436, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4857, PETRI_PLACES=304, PETRI_TRANSITIONS=353} [2024-05-12 10:38:04,125 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 253 predicate places. [2024-05-12 10:38:04,125 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 353 transitions, 4857 flow [2024-05-12 10:38:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:04,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:04,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:38:04,126 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 10:38:04,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -47639969, now seen corresponding path program 2 times [2024-05-12 10:38:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769442830] [2024-05-12 10:38:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:04,432 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 10:38:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769442830] [2024-05-12 10:38:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769442830] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:04,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:04,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:04,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410587795] [2024-05-12 10:38:04,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:04,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:04,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:04,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 353 transitions, 4857 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:04,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:04,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:04,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:06,104 INFO L124 PetriNetUnfolderBase]: 5884/10047 cut-off events. [2024-05-12 10:38:06,104 INFO L125 PetriNetUnfolderBase]: For 432730/432793 co-relation queries the response was YES. [2024-05-12 10:38:06,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62389 conditions, 10047 events. 5884/10047 cut-off events. For 432730/432793 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 78083 event pairs, 1935 based on Foata normal form. 12/9670 useless extension candidates. Maximal degree in co-relation 62247. Up to 7848 conditions per place. [2024-05-12 10:38:06,276 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 236 selfloop transitions, 135 changer transitions 0/385 dead transitions. [2024-05-12 10:38:06,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 385 transitions, 5793 flow [2024-05-12 10:38:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-05-12 10:38:06,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-05-12 10:38:06,277 INFO L175 Difference]: Start difference. First operand has 304 places, 353 transitions, 4857 flow. Second operand 9 states and 241 transitions. [2024-05-12 10:38:06,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 385 transitions, 5793 flow [2024-05-12 10:38:07,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 385 transitions, 5389 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:07,850 INFO L231 Difference]: Finished difference. Result has 307 places, 355 transitions, 4813 flow [2024-05-12 10:38:07,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4813, PETRI_PLACES=307, PETRI_TRANSITIONS=355} [2024-05-12 10:38:07,851 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 256 predicate places. [2024-05-12 10:38:07,851 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 355 transitions, 4813 flow [2024-05-12 10:38:07,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:07,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:07,851 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 10:38:07,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:38:07,851 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 10:38:07,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1316138401, now seen corresponding path program 3 times [2024-05-12 10:38:07,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751266000] [2024-05-12 10:38:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:07,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:08,120 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 10:38:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751266000] [2024-05-12 10:38:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751266000] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:08,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651239573] [2024-05-12 10:38:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:08,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 355 transitions, 4813 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:09,796 INFO L124 PetriNetUnfolderBase]: 5990/10267 cut-off events. [2024-05-12 10:38:09,796 INFO L125 PetriNetUnfolderBase]: For 425964/426064 co-relation queries the response was YES. [2024-05-12 10:38:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62437 conditions, 10267 events. 5990/10267 cut-off events. For 425964/426064 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 80394 event pairs, 2087 based on Foata normal form. 32/9903 useless extension candidates. Maximal degree in co-relation 62295. Up to 8648 conditions per place. [2024-05-12 10:38:09,949 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 246 selfloop transitions, 125 changer transitions 0/385 dead transitions. [2024-05-12 10:38:09,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 385 transitions, 5745 flow [2024-05-12 10:38:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:38:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:38:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-05-12 10:38:09,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-05-12 10:38:09,950 INFO L175 Difference]: Start difference. First operand has 307 places, 355 transitions, 4813 flow. Second operand 10 states and 260 transitions. [2024-05-12 10:38:09,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 385 transitions, 5745 flow [2024-05-12 10:38:11,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 385 transitions, 5411 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:11,503 INFO L231 Difference]: Finished difference. Result has 310 places, 357 transitions, 4818 flow [2024-05-12 10:38:11,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4818, PETRI_PLACES=310, PETRI_TRANSITIONS=357} [2024-05-12 10:38:11,503 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-05-12 10:38:11,503 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 357 transitions, 4818 flow [2024-05-12 10:38:11,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:11,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:11,503 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 10:38:11,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:38:11,504 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 10:38:11,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1306941631, now seen corresponding path program 4 times [2024-05-12 10:38:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:11,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15700841] [2024-05-12 10:38:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:11,767 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 10:38:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15700841] [2024-05-12 10:38:11,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15700841] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906375337] [2024-05-12 10:38:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:11,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:11,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:11,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 357 transitions, 4818 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:11,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:11,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:11,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:13,467 INFO L124 PetriNetUnfolderBase]: 6030/10341 cut-off events. [2024-05-12 10:38:13,467 INFO L125 PetriNetUnfolderBase]: For 400595/400683 co-relation queries the response was YES. [2024-05-12 10:38:13,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61271 conditions, 10341 events. 6030/10341 cut-off events. For 400595/400683 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 81017 event pairs, 2044 based on Foata normal form. 32/9982 useless extension candidates. Maximal degree in co-relation 61128. Up to 7568 conditions per place. [2024-05-12 10:38:13,615 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 227 selfloop transitions, 147 changer transitions 0/388 dead transitions. [2024-05-12 10:38:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 388 transitions, 5714 flow [2024-05-12 10:38:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-05-12 10:38:13,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-05-12 10:38:13,616 INFO L175 Difference]: Start difference. First operand has 310 places, 357 transitions, 4818 flow. Second operand 9 states and 241 transitions. [2024-05-12 10:38:13,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 388 transitions, 5714 flow [2024-05-12 10:38:15,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 388 transitions, 5403 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:15,163 INFO L231 Difference]: Finished difference. Result has 311 places, 358 transitions, 4838 flow [2024-05-12 10:38:15,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4838, PETRI_PLACES=311, PETRI_TRANSITIONS=358} [2024-05-12 10:38:15,164 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 260 predicate places. [2024-05-12 10:38:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 358 transitions, 4838 flow [2024-05-12 10:38:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:15,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:15,164 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 10:38:15,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:38:15,165 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 10:38:15,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1221338521, now seen corresponding path program 1 times [2024-05-12 10:38:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339251278] [2024-05-12 10:38:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:15,447 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 10:38:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339251278] [2024-05-12 10:38:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339251278] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:15,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:15,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585499071] [2024-05-12 10:38:15,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:15,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:15,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:15,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 358 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:15,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:15,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:15,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:17,330 INFO L124 PetriNetUnfolderBase]: 6058/10344 cut-off events. [2024-05-12 10:38:17,330 INFO L125 PetriNetUnfolderBase]: For 376334/376411 co-relation queries the response was YES. [2024-05-12 10:38:17,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61605 conditions, 10344 events. 6058/10344 cut-off events. For 376334/376411 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 80962 event pairs, 2109 based on Foata normal form. 3/9938 useless extension candidates. Maximal degree in co-relation 61461. Up to 9167 conditions per place. [2024-05-12 10:38:17,453 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 308 selfloop transitions, 67 changer transitions 0/389 dead transitions. [2024-05-12 10:38:17,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 389 transitions, 5954 flow [2024-05-12 10:38:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:38:17,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048632218844985 [2024-05-12 10:38:17,454 INFO L175 Difference]: Start difference. First operand has 311 places, 358 transitions, 4838 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:38:17,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 389 transitions, 5954 flow [2024-05-12 10:38:18,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 389 transitions, 5508 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-05-12 10:38:18,901 INFO L231 Difference]: Finished difference. Result has 310 places, 365 transitions, 4726 flow [2024-05-12 10:38:18,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4726, PETRI_PLACES=310, PETRI_TRANSITIONS=365} [2024-05-12 10:38:18,902 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-05-12 10:38:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 365 transitions, 4726 flow [2024-05-12 10:38:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:18,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:18,902 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, 1] [2024-05-12 10:38:18,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:38:18,902 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 10:38:18,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1074341913, now seen corresponding path program 2 times [2024-05-12 10:38:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608088576] [2024-05-12 10:38:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608088576] [2024-05-12 10:38:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608088576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:19,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:19,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227567253] [2024-05-12 10:38:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:19,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:19,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:19,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:19,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 365 transitions, 4726 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:19,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:19,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:19,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:20,898 INFO L124 PetriNetUnfolderBase]: 6071/10368 cut-off events. [2024-05-12 10:38:20,898 INFO L125 PetriNetUnfolderBase]: For 369753/369830 co-relation queries the response was YES. [2024-05-12 10:38:21,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59781 conditions, 10368 events. 6071/10368 cut-off events. For 369753/369830 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 81053 event pairs, 2116 based on Foata normal form. 3/9959 useless extension candidates. Maximal degree in co-relation 59637. Up to 9221 conditions per place. [2024-05-12 10:38:21,051 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 325 selfloop transitions, 52 changer transitions 0/391 dead transitions. [2024-05-12 10:38:21,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 391 transitions, 5647 flow [2024-05-12 10:38:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:38:21,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-05-12 10:38:21,052 INFO L175 Difference]: Start difference. First operand has 310 places, 365 transitions, 4726 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:38:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 391 transitions, 5647 flow [2024-05-12 10:38:22,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 391 transitions, 5478 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:22,671 INFO L231 Difference]: Finished difference. Result has 313 places, 371 transitions, 4794 flow [2024-05-12 10:38:22,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4794, PETRI_PLACES=313, PETRI_TRANSITIONS=371} [2024-05-12 10:38:22,672 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 262 predicate places. [2024-05-12 10:38:22,672 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 371 transitions, 4794 flow [2024-05-12 10:38:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:22,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:22,672 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 10:38:22,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:38:22,672 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 10:38:22,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash 733689957, now seen corresponding path program 1 times [2024-05-12 10:38:22,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210304210] [2024-05-12 10:38:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:22,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:22,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:22,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210304210] [2024-05-12 10:38:22,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210304210] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:22,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:22,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382230630] [2024-05-12 10:38:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:22,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:23,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:23,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 371 transitions, 4794 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:23,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:23,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:23,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:24,631 INFO L124 PetriNetUnfolderBase]: 6088/10410 cut-off events. [2024-05-12 10:38:24,631 INFO L125 PetriNetUnfolderBase]: For 365335/365424 co-relation queries the response was YES. [2024-05-12 10:38:24,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59903 conditions, 10410 events. 6088/10410 cut-off events. For 365335/365424 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 81567 event pairs, 2154 based on Foata normal form. 12/10007 useless extension candidates. Maximal degree in co-relation 59758. Up to 9173 conditions per place. [2024-05-12 10:38:24,793 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 306 selfloop transitions, 71 changer transitions 0/391 dead transitions. [2024-05-12 10:38:24,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 391 transitions, 5794 flow [2024-05-12 10:38:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 10:38:24,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:38:24,794 INFO L175 Difference]: Start difference. First operand has 313 places, 371 transitions, 4794 flow. Second operand 6 states and 168 transitions. [2024-05-12 10:38:24,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 391 transitions, 5794 flow [2024-05-12 10:38:26,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 391 transitions, 5696 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:26,522 INFO L231 Difference]: Finished difference. Result has 316 places, 377 transitions, 4920 flow [2024-05-12 10:38:26,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4920, PETRI_PLACES=316, PETRI_TRANSITIONS=377} [2024-05-12 10:38:26,522 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-05-12 10:38:26,522 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 377 transitions, 4920 flow [2024-05-12 10:38:26,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:26,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:26,523 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 10:38:26,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:38:26,523 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 10:38:26,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1096738949, now seen corresponding path program 3 times [2024-05-12 10:38:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:26,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264110053] [2024-05-12 10:38:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264110053] [2024-05-12 10:38:26,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264110053] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:26,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:26,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404389907] [2024-05-12 10:38:26,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:26,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:26,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 377 transitions, 4920 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:26,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:26,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:26,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:28,541 INFO L124 PetriNetUnfolderBase]: 6107/10423 cut-off events. [2024-05-12 10:38:28,541 INFO L125 PetriNetUnfolderBase]: For 373134/373215 co-relation queries the response was YES. [2024-05-12 10:38:28,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60313 conditions, 10423 events. 6107/10423 cut-off events. For 373134/373215 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 81445 event pairs, 2115 based on Foata normal form. 3/10005 useless extension candidates. Maximal degree in co-relation 60167. Up to 9283 conditions per place. [2024-05-12 10:38:28,699 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 353 selfloop transitions, 49 changer transitions 0/416 dead transitions. [2024-05-12 10:38:28,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 416 transitions, 5945 flow [2024-05-12 10:38:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 281 transitions. [2024-05-12 10:38:28,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435203094777563 [2024-05-12 10:38:28,700 INFO L175 Difference]: Start difference. First operand has 316 places, 377 transitions, 4920 flow. Second operand 11 states and 281 transitions. [2024-05-12 10:38:28,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 416 transitions, 5945 flow [2024-05-12 10:38:30,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 416 transitions, 5898 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 10:38:30,622 INFO L231 Difference]: Finished difference. Result has 325 places, 386 transitions, 5130 flow [2024-05-12 10:38:30,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5130, PETRI_PLACES=325, PETRI_TRANSITIONS=386} [2024-05-12 10:38:30,623 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 274 predicate places. [2024-05-12 10:38:30,623 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 386 transitions, 5130 flow [2024-05-12 10:38:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:30,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:30,623 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 10:38:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:38:30,623 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 10:38:30,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash -897210207, now seen corresponding path program 2 times [2024-05-12 10:38:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:30,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733380630] [2024-05-12 10:38:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:30,901 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 10:38:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:30,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733380630] [2024-05-12 10:38:30,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733380630] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:30,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:30,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:30,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287149253] [2024-05-12 10:38:30,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:30,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 386 transitions, 5130 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:30,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:30,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:32,775 INFO L124 PetriNetUnfolderBase]: 6114/10453 cut-off events. [2024-05-12 10:38:32,775 INFO L125 PetriNetUnfolderBase]: For 381216/381309 co-relation queries the response was YES. [2024-05-12 10:38:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60665 conditions, 10453 events. 6114/10453 cut-off events. For 381216/381309 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 82016 event pairs, 2162 based on Foata normal form. 12/10043 useless extension candidates. Maximal degree in co-relation 60517. Up to 9198 conditions per place. [2024-05-12 10:38:32,910 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 307 selfloop transitions, 81 changer transitions 0/402 dead transitions. [2024-05-12 10:38:32,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 402 transitions, 6129 flow [2024-05-12 10:38:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 10:38:32,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-05-12 10:38:32,911 INFO L175 Difference]: Start difference. First operand has 325 places, 386 transitions, 5130 flow. Second operand 5 states and 144 transitions. [2024-05-12 10:38:32,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 402 transitions, 6129 flow [2024-05-12 10:38:34,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 402 transitions, 5951 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:34,644 INFO L231 Difference]: Finished difference. Result has 322 places, 389 transitions, 5178 flow [2024-05-12 10:38:34,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5178, PETRI_PLACES=322, PETRI_TRANSITIONS=389} [2024-05-12 10:38:34,644 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 271 predicate places. [2024-05-12 10:38:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 389 transitions, 5178 flow [2024-05-12 10:38:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:34,645 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 10:38:34,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:38:34,645 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 10:38:34,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1096976285, now seen corresponding path program 3 times [2024-05-12 10:38:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:34,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087440582] [2024-05-12 10:38:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:34,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:34,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087440582] [2024-05-12 10:38:34,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087440582] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:34,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:34,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286573278] [2024-05-12 10:38:34,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:34,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:34,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:34,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:34,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 389 transitions, 5178 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:34,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:34,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:36,614 INFO L124 PetriNetUnfolderBase]: 6111/10419 cut-off events. [2024-05-12 10:38:36,614 INFO L125 PetriNetUnfolderBase]: For 386307/386401 co-relation queries the response was YES. [2024-05-12 10:38:36,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60697 conditions, 10419 events. 6111/10419 cut-off events. For 386307/386401 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 81368 event pairs, 2125 based on Foata normal form. 16/10011 useless extension candidates. Maximal degree in co-relation 60548. Up to 9195 conditions per place. [2024-05-12 10:38:36,776 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 301 selfloop transitions, 88 changer transitions 0/403 dead transitions. [2024-05-12 10:38:36,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 403 transitions, 5990 flow [2024-05-12 10:38:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 10:38:36,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 10:38:36,777 INFO L175 Difference]: Start difference. First operand has 322 places, 389 transitions, 5178 flow. Second operand 7 states and 189 transitions. [2024-05-12 10:38:36,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 403 transitions, 5990 flow [2024-05-12 10:38:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 403 transitions, 5873 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:38,892 INFO L231 Difference]: Finished difference. Result has 325 places, 389 transitions, 5248 flow [2024-05-12 10:38:38,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5248, PETRI_PLACES=325, PETRI_TRANSITIONS=389} [2024-05-12 10:38:38,893 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 274 predicate places. [2024-05-12 10:38:38,893 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 389 transitions, 5248 flow [2024-05-12 10:38:38,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:38,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:38,893 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 10:38:38,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:38:38,893 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 10:38:38,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1102433689, now seen corresponding path program 4 times [2024-05-12 10:38:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:38,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263286116] [2024-05-12 10:38:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:38,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:39,166 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 10:38:39,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263286116] [2024-05-12 10:38:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263286116] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:39,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725431972] [2024-05-12 10:38:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:39,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:39,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 389 transitions, 5248 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:39,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:39,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:39,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:40,939 INFO L124 PetriNetUnfolderBase]: 6171/10531 cut-off events. [2024-05-12 10:38:40,939 INFO L125 PetriNetUnfolderBase]: For 396641/396749 co-relation queries the response was YES. [2024-05-12 10:38:41,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61843 conditions, 10531 events. 6171/10531 cut-off events. For 396641/396749 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 82495 event pairs, 2145 based on Foata normal form. 11/10113 useless extension candidates. Maximal degree in co-relation 61695. Up to 8949 conditions per place. [2024-05-12 10:38:41,116 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 240 selfloop transitions, 192 changer transitions 0/446 dead transitions. [2024-05-12 10:38:41,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 446 transitions, 7190 flow [2024-05-12 10:38:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:38:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:38:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-05-12 10:38:41,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106382978723405 [2024-05-12 10:38:41,117 INFO L175 Difference]: Start difference. First operand has 325 places, 389 transitions, 5248 flow. Second operand 10 states and 287 transitions. [2024-05-12 10:38:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 446 transitions, 7190 flow [2024-05-12 10:38:43,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 446 transitions, 6940 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:43,344 INFO L231 Difference]: Finished difference. Result has 328 places, 404 transitions, 5762 flow [2024-05-12 10:38:43,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5762, PETRI_PLACES=328, PETRI_TRANSITIONS=404} [2024-05-12 10:38:43,345 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 277 predicate places. [2024-05-12 10:38:43,345 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 404 transitions, 5762 flow [2024-05-12 10:38:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:43,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:43,345 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 10:38:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:38:43,345 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 10:38:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash -955437081, now seen corresponding path program 5 times [2024-05-12 10:38:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385017936] [2024-05-12 10:38:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385017936] [2024-05-12 10:38:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385017936] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:38:43,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931850671] [2024-05-12 10:38:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:38:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:38:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:38:43,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:43,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 404 transitions, 5762 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:43,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:43,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:45,609 INFO L124 PetriNetUnfolderBase]: 6184/10568 cut-off events. [2024-05-12 10:38:45,609 INFO L125 PetriNetUnfolderBase]: For 399426/399522 co-relation queries the response was YES. [2024-05-12 10:38:45,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62486 conditions, 10568 events. 6184/10568 cut-off events. For 399426/399522 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 82805 event pairs, 2146 based on Foata normal form. 16/10150 useless extension candidates. Maximal degree in co-relation 62338. Up to 9227 conditions per place. [2024-05-12 10:38:45,770 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 321 selfloop transitions, 112 changer transitions 0/447 dead transitions. [2024-05-12 10:38:45,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 447 transitions, 6989 flow [2024-05-12 10:38:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 295 transitions. [2024-05-12 10:38:45,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705996131528046 [2024-05-12 10:38:45,771 INFO L175 Difference]: Start difference. First operand has 328 places, 404 transitions, 5762 flow. Second operand 11 states and 295 transitions. [2024-05-12 10:38:45,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 447 transitions, 6989 flow [2024-05-12 10:38:47,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 447 transitions, 6479 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:47,767 INFO L231 Difference]: Finished difference. Result has 333 places, 410 transitions, 5603 flow [2024-05-12 10:38:47,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5603, PETRI_PLACES=333, PETRI_TRANSITIONS=410} [2024-05-12 10:38:47,767 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 282 predicate places. [2024-05-12 10:38:47,767 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 410 transitions, 5603 flow [2024-05-12 10:38:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:47,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:47,768 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 10:38:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:38:47,768 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 10:38:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 852594789, now seen corresponding path program 4 times [2024-05-12 10:38:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15960601] [2024-05-12 10:38:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:48,036 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 10:38:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15960601] [2024-05-12 10:38:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15960601] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:48,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:48,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888181630] [2024-05-12 10:38:48,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:48,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:48,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:48,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:48,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 410 transitions, 5603 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:48,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:48,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:49,921 INFO L124 PetriNetUnfolderBase]: 6197/10555 cut-off events. [2024-05-12 10:38:49,921 INFO L125 PetriNetUnfolderBase]: For 402629/402708 co-relation queries the response was YES. [2024-05-12 10:38:50,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62182 conditions, 10555 events. 6197/10555 cut-off events. For 402629/402708 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 82360 event pairs, 2117 based on Foata normal form. 1/10108 useless extension candidates. Maximal degree in co-relation 62035. Up to 9243 conditions per place. [2024-05-12 10:38:50,055 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 335 selfloop transitions, 96 changer transitions 0/445 dead transitions. [2024-05-12 10:38:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 445 transitions, 6772 flow [2024-05-12 10:38:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 10:38:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-05-12 10:38:50,056 INFO L175 Difference]: Start difference. First operand has 333 places, 410 transitions, 5603 flow. Second operand 9 states and 242 transitions. [2024-05-12 10:38:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 445 transitions, 6772 flow [2024-05-12 10:38:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 445 transitions, 6512 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:52,218 INFO L231 Difference]: Finished difference. Result has 335 places, 416 transitions, 5631 flow [2024-05-12 10:38:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5631, PETRI_PLACES=335, PETRI_TRANSITIONS=416} [2024-05-12 10:38:52,219 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 284 predicate places. [2024-05-12 10:38:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 416 transitions, 5631 flow [2024-05-12 10:38:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:52,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:52,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:52,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:38:52,219 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 10:38:52,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -903131899, now seen corresponding path program 6 times [2024-05-12 10:38:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342042157] [2024-05-12 10:38:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342042157] [2024-05-12 10:38:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342042157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:52,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:52,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777085934] [2024-05-12 10:38:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:52,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:52,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 416 transitions, 5631 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:52,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:52,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:52,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:54,285 INFO L124 PetriNetUnfolderBase]: 6204/10579 cut-off events. [2024-05-12 10:38:54,285 INFO L125 PetriNetUnfolderBase]: For 411521/411647 co-relation queries the response was YES. [2024-05-12 10:38:54,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62326 conditions, 10579 events. 6204/10579 cut-off events. For 411521/411647 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 82766 event pairs, 2138 based on Foata normal form. 23/10166 useless extension candidates. Maximal degree in co-relation 62177. Up to 8984 conditions per place. [2024-05-12 10:38:54,444 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 239 selfloop transitions, 211 changer transitions 0/464 dead transitions. [2024-05-12 10:38:54,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 464 transitions, 7167 flow [2024-05-12 10:38:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-05-12 10:38:54,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597678916827853 [2024-05-12 10:38:54,445 INFO L175 Difference]: Start difference. First operand has 335 places, 416 transitions, 5631 flow. Second operand 11 states and 309 transitions. [2024-05-12 10:38:54,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 464 transitions, 7167 flow [2024-05-12 10:38:56,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 464 transitions, 6954 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:38:56,717 INFO L231 Difference]: Finished difference. Result has 341 places, 419 transitions, 5896 flow [2024-05-12 10:38:56,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5896, PETRI_PLACES=341, PETRI_TRANSITIONS=419} [2024-05-12 10:38:56,717 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 290 predicate places. [2024-05-12 10:38:56,717 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 419 transitions, 5896 flow [2024-05-12 10:38:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:56,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:56,717 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 10:38:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:38:56,717 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 10:38:56,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1785117051, now seen corresponding path program 7 times [2024-05-12 10:38:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:56,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458667371] [2024-05-12 10:38:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:56,989 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 10:38:56,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458667371] [2024-05-12 10:38:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458667371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:56,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386235128] [2024-05-12 10:38:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:56,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:56,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:57,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:38:57,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 419 transitions, 5896 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:57,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:57,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:38:57,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:58,751 INFO L124 PetriNetUnfolderBase]: 6211/10615 cut-off events. [2024-05-12 10:38:58,751 INFO L125 PetriNetUnfolderBase]: For 421085/421191 co-relation queries the response was YES. [2024-05-12 10:38:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62809 conditions, 10615 events. 6211/10615 cut-off events. For 421085/421191 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 83245 event pairs, 2163 based on Foata normal form. 11/10189 useless extension candidates. Maximal degree in co-relation 62660. Up to 8906 conditions per place. [2024-05-12 10:38:58,922 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 220 selfloop transitions, 232 changer transitions 0/466 dead transitions. [2024-05-12 10:38:58,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 466 transitions, 7444 flow [2024-05-12 10:38:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:38:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:38:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 348 transitions. [2024-05-12 10:38:58,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695581014729951 [2024-05-12 10:38:58,923 INFO L175 Difference]: Start difference. First operand has 341 places, 419 transitions, 5896 flow. Second operand 13 states and 348 transitions. [2024-05-12 10:38:58,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 466 transitions, 7444 flow [2024-05-12 10:39:01,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 466 transitions, 6999 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:01,252 INFO L231 Difference]: Finished difference. Result has 346 places, 422 transitions, 5977 flow [2024-05-12 10:39:01,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5977, PETRI_PLACES=346, PETRI_TRANSITIONS=422} [2024-05-12 10:39:01,253 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 295 predicate places. [2024-05-12 10:39:01,253 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 422 transitions, 5977 flow [2024-05-12 10:39:01,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:01,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:01,253 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 10:39:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:39:01,253 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 10:39:01,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1177335909, now seen corresponding path program 5 times [2024-05-12 10:39:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:01,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335331524] [2024-05-12 10:39:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:01,520 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 10:39:01,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:01,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335331524] [2024-05-12 10:39:01,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335331524] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:01,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:01,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678516537] [2024-05-12 10:39:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:01,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:01,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 422 transitions, 5977 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:01,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:01,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:01,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:03,409 INFO L124 PetriNetUnfolderBase]: 6247/10654 cut-off events. [2024-05-12 10:39:03,410 INFO L125 PetriNetUnfolderBase]: For 432941/433018 co-relation queries the response was YES. [2024-05-12 10:39:03,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63317 conditions, 10654 events. 6247/10654 cut-off events. For 432941/433018 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 83323 event pairs, 2137 based on Foata normal form. 1/10197 useless extension candidates. Maximal degree in co-relation 63167. Up to 9298 conditions per place. [2024-05-12 10:39:03,550 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 338 selfloop transitions, 111 changer transitions 0/463 dead transitions. [2024-05-12 10:39:03,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 463 transitions, 7436 flow [2024-05-12 10:39:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:39:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:39:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-05-12 10:39:03,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2024-05-12 10:39:03,551 INFO L175 Difference]: Start difference. First operand has 346 places, 422 transitions, 5977 flow. Second operand 10 states and 263 transitions. [2024-05-12 10:39:03,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 463 transitions, 7436 flow [2024-05-12 10:39:05,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 463 transitions, 6892 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-05-12 10:39:05,920 INFO L231 Difference]: Finished difference. Result has 348 places, 435 transitions, 5849 flow [2024-05-12 10:39:05,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5849, PETRI_PLACES=348, PETRI_TRANSITIONS=435} [2024-05-12 10:39:05,920 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 297 predicate places. [2024-05-12 10:39:05,920 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 435 transitions, 5849 flow [2024-05-12 10:39:05,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:05,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:05,921 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 10:39:05,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:39:05,921 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 10:39:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 245201043, now seen corresponding path program 6 times [2024-05-12 10:39:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:05,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269671416] [2024-05-12 10:39:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:06,191 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 10:39:06,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269671416] [2024-05-12 10:39:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269671416] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:06,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:06,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829155710] [2024-05-12 10:39:06,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:06,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:06,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:06,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:06,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 435 transitions, 5849 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:06,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:06,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:06,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:07,998 INFO L124 PetriNetUnfolderBase]: 6244/10630 cut-off events. [2024-05-12 10:39:07,999 INFO L125 PetriNetUnfolderBase]: For 433886/433965 co-relation queries the response was YES. [2024-05-12 10:39:08,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62888 conditions, 10630 events. 6244/10630 cut-off events. For 433886/433965 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 82955 event pairs, 2117 based on Foata normal form. 1/10171 useless extension candidates. Maximal degree in co-relation 62737. Up to 9295 conditions per place. [2024-05-12 10:39:08,179 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 330 selfloop transitions, 119 changer transitions 0/463 dead transitions. [2024-05-12 10:39:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 463 transitions, 6979 flow [2024-05-12 10:39:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-05-12 10:39:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473887814313346 [2024-05-12 10:39:08,180 INFO L175 Difference]: Start difference. First operand has 348 places, 435 transitions, 5849 flow. Second operand 11 states and 283 transitions. [2024-05-12 10:39:08,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 463 transitions, 6979 flow [2024-05-12 10:39:10,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 463 transitions, 6805 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:10,559 INFO L231 Difference]: Finished difference. Result has 354 places, 435 transitions, 5919 flow [2024-05-12 10:39:10,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5919, PETRI_PLACES=354, PETRI_TRANSITIONS=435} [2024-05-12 10:39:10,559 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 303 predicate places. [2024-05-12 10:39:10,559 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 435 transitions, 5919 flow [2024-05-12 10:39:10,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:10,560 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 10:39:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:39:10,560 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 10:39:10,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -777365209, now seen corresponding path program 8 times [2024-05-12 10:39:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:10,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691089697] [2024-05-12 10:39:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:10,854 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 10:39:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691089697] [2024-05-12 10:39:10,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691089697] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:10,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742585250] [2024-05-12 10:39:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:10,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 435 transitions, 5919 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:10,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:12,698 INFO L124 PetriNetUnfolderBase]: 6261/10675 cut-off events. [2024-05-12 10:39:12,698 INFO L125 PetriNetUnfolderBase]: For 446536/446651 co-relation queries the response was YES. [2024-05-12 10:39:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63328 conditions, 10675 events. 6261/10675 cut-off events. For 446536/446651 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 83603 event pairs, 2133 based on Foata normal form. 25/10246 useless extension candidates. Maximal degree in co-relation 63176. Up to 9342 conditions per place. [2024-05-12 10:39:12,865 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 339 selfloop transitions, 122 changer transitions 0/475 dead transitions. [2024-05-12 10:39:12,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 475 transitions, 7196 flow [2024-05-12 10:39:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-05-12 10:39:12,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609284332688588 [2024-05-12 10:39:12,866 INFO L175 Difference]: Start difference. First operand has 354 places, 435 transitions, 5919 flow. Second operand 11 states and 290 transitions. [2024-05-12 10:39:12,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 475 transitions, 7196 flow [2024-05-12 10:39:15,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 475 transitions, 6998 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:15,858 INFO L231 Difference]: Finished difference. Result has 359 places, 441 transitions, 6104 flow [2024-05-12 10:39:15,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6104, PETRI_PLACES=359, PETRI_TRANSITIONS=441} [2024-05-12 10:39:15,859 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 308 predicate places. [2024-05-12 10:39:15,859 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 441 transitions, 6104 flow [2024-05-12 10:39:15,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:15,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:15,859 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 10:39:15,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:39:15,859 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 10:39:15,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -630695961, now seen corresponding path program 9 times [2024-05-12 10:39:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:15,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549391786] [2024-05-12 10:39:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:16,150 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 10:39:16,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549391786] [2024-05-12 10:39:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549391786] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:16,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:16,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366672357] [2024-05-12 10:39:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:16,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:16,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 441 transitions, 6104 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:16,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:16,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:18,142 INFO L124 PetriNetUnfolderBase]: 6258/10666 cut-off events. [2024-05-12 10:39:18,142 INFO L125 PetriNetUnfolderBase]: For 452370/452485 co-relation queries the response was YES. [2024-05-12 10:39:18,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63418 conditions, 10666 events. 6258/10666 cut-off events. For 452370/452485 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 83322 event pairs, 2126 based on Foata normal form. 33/10245 useless extension candidates. Maximal degree in co-relation 63264. Up to 9298 conditions per place. [2024-05-12 10:39:18,305 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 319 selfloop transitions, 145 changer transitions 0/478 dead transitions. [2024-05-12 10:39:18,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 478 transitions, 7290 flow [2024-05-12 10:39:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:39:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:39:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 354 transitions. [2024-05-12 10:39:18,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-05-12 10:39:18,306 INFO L175 Difference]: Start difference. First operand has 359 places, 441 transitions, 6104 flow. Second operand 14 states and 354 transitions. [2024-05-12 10:39:18,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 478 transitions, 7290 flow [2024-05-12 10:39:20,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 478 transitions, 7047 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:20,840 INFO L231 Difference]: Finished difference. Result has 367 places, 441 transitions, 6157 flow [2024-05-12 10:39:20,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6157, PETRI_PLACES=367, PETRI_TRANSITIONS=441} [2024-05-12 10:39:20,841 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 316 predicate places. [2024-05-12 10:39:20,841 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 441 transitions, 6157 flow [2024-05-12 10:39:20,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:20,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:20,841 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 10:39:20,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:39:20,841 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 10:39:20,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1281448367, now seen corresponding path program 7 times [2024-05-12 10:39:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719025132] [2024-05-12 10:39:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:21,118 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 10:39:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719025132] [2024-05-12 10:39:21,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719025132] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:21,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:21,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385626939] [2024-05-12 10:39:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:21,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:21,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:21,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 441 transitions, 6157 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:21,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:21,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:21,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:22,966 INFO L124 PetriNetUnfolderBase]: 6265/10699 cut-off events. [2024-05-12 10:39:22,966 INFO L125 PetriNetUnfolderBase]: For 461277/461384 co-relation queries the response was YES. [2024-05-12 10:39:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63650 conditions, 10699 events. 6265/10699 cut-off events. For 461277/461384 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 83954 event pairs, 2165 based on Foata normal form. 26/10266 useless extension candidates. Maximal degree in co-relation 63495. Up to 9321 conditions per place. [2024-05-12 10:39:23,151 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 326 selfloop transitions, 124 changer transitions 0/464 dead transitions. [2024-05-12 10:39:23,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 464 transitions, 7318 flow [2024-05-12 10:39:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 10:39:23,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-05-12 10:39:23,152 INFO L175 Difference]: Start difference. First operand has 367 places, 441 transitions, 6157 flow. Second operand 9 states and 232 transitions. [2024-05-12 10:39:23,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 464 transitions, 7318 flow [2024-05-12 10:39:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 464 transitions, 6996 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-05-12 10:39:26,071 INFO L231 Difference]: Finished difference. Result has 363 places, 444 transitions, 6132 flow [2024-05-12 10:39:26,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5841, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6132, PETRI_PLACES=363, PETRI_TRANSITIONS=444} [2024-05-12 10:39:26,072 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 312 predicate places. [2024-05-12 10:39:26,072 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 444 transitions, 6132 flow [2024-05-12 10:39:26,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:26,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:26,072 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 10:39:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:39:26,073 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 10:39:26,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash -539995973, now seen corresponding path program 10 times [2024-05-12 10:39:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056290538] [2024-05-12 10:39:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:26,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:26,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056290538] [2024-05-12 10:39:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056290538] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:26,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:26,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686412394] [2024-05-12 10:39:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:26,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:26,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:26,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:26,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 444 transitions, 6132 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:26,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:26,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:26,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:28,291 INFO L124 PetriNetUnfolderBase]: 6326/10771 cut-off events. [2024-05-12 10:39:28,291 INFO L125 PetriNetUnfolderBase]: For 482937/483065 co-relation queries the response was YES. [2024-05-12 10:39:28,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64674 conditions, 10771 events. 6326/10771 cut-off events. For 482937/483065 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 84212 event pairs, 2126 based on Foata normal form. 30/10334 useless extension candidates. Maximal degree in co-relation 64518. Up to 9394 conditions per place. [2024-05-12 10:39:28,490 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 334 selfloop transitions, 153 changer transitions 0/501 dead transitions. [2024-05-12 10:39:28,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 501 transitions, 8146 flow [2024-05-12 10:39:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:39:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:39:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 348 transitions. [2024-05-12 10:39:28,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-05-12 10:39:28,491 INFO L175 Difference]: Start difference. First operand has 363 places, 444 transitions, 6132 flow. Second operand 14 states and 348 transitions. [2024-05-12 10:39:28,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 501 transitions, 8146 flow [2024-05-12 10:39:31,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 501 transitions, 7861 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:31,388 INFO L231 Difference]: Finished difference. Result has 374 places, 468 transitions, 6701 flow [2024-05-12 10:39:31,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6701, PETRI_PLACES=374, PETRI_TRANSITIONS=468} [2024-05-12 10:39:31,388 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 323 predicate places. [2024-05-12 10:39:31,388 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 468 transitions, 6701 flow [2024-05-12 10:39:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:31,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:31,389 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 10:39:31,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:39:31,389 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 10:39:31,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -397758007, now seen corresponding path program 11 times [2024-05-12 10:39:31,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:31,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993931559] [2024-05-12 10:39:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:31,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:31,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:31,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993931559] [2024-05-12 10:39:31,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993931559] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:31,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:31,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550425575] [2024-05-12 10:39:31,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:31,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:31,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:31,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 468 transitions, 6701 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:31,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:31,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:31,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:33,598 INFO L124 PetriNetUnfolderBase]: 6323/10762 cut-off events. [2024-05-12 10:39:33,598 INFO L125 PetriNetUnfolderBase]: For 489221/489349 co-relation queries the response was YES. [2024-05-12 10:39:33,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64922 conditions, 10762 events. 6323/10762 cut-off events. For 489221/489349 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 84076 event pairs, 2119 based on Foata normal form. 44/10339 useless extension candidates. Maximal degree in co-relation 64761. Up to 9341 conditions per place. [2024-05-12 10:39:33,770 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 307 selfloop transitions, 179 changer transitions 0/500 dead transitions. [2024-05-12 10:39:33,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 500 transitions, 8271 flow [2024-05-12 10:39:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:39:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:39:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 328 transitions. [2024-05-12 10:39:33,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368248772504092 [2024-05-12 10:39:33,771 INFO L175 Difference]: Start difference. First operand has 374 places, 468 transitions, 6701 flow. Second operand 13 states and 328 transitions. [2024-05-12 10:39:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 500 transitions, 8271 flow [2024-05-12 10:39:37,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 500 transitions, 7980 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:37,262 INFO L231 Difference]: Finished difference. Result has 381 places, 468 transitions, 6774 flow [2024-05-12 10:39:37,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6410, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6774, PETRI_PLACES=381, PETRI_TRANSITIONS=468} [2024-05-12 10:39:37,262 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 330 predicate places. [2024-05-12 10:39:37,262 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 468 transitions, 6774 flow [2024-05-12 10:39:37,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:37,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:37,262 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 10:39:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:39:37,262 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 10:39:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1557943891, now seen corresponding path program 8 times [2024-05-12 10:39:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154984397] [2024-05-12 10:39:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:37,527 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 10:39:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154984397] [2024-05-12 10:39:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154984397] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379591001] [2024-05-12 10:39:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 468 transitions, 6774 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:37,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:37,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:37,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:39,531 INFO L124 PetriNetUnfolderBase]: 6330/10789 cut-off events. [2024-05-12 10:39:39,532 INFO L125 PetriNetUnfolderBase]: For 497833/497910 co-relation queries the response was YES. [2024-05-12 10:39:39,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65108 conditions, 10789 events. 6330/10789 cut-off events. For 497833/497910 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 84496 event pairs, 2144 based on Foata normal form. 1/10312 useless extension candidates. Maximal degree in co-relation 64947. Up to 9391 conditions per place. [2024-05-12 10:39:39,679 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 344 selfloop transitions, 139 changer transitions 0/497 dead transitions. [2024-05-12 10:39:39,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 497 transitions, 8023 flow [2024-05-12 10:39:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 10:39:39,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-05-12 10:39:39,680 INFO L175 Difference]: Start difference. First operand has 381 places, 468 transitions, 6774 flow. Second operand 9 states and 238 transitions. [2024-05-12 10:39:39,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 497 transitions, 8023 flow [2024-05-12 10:39:42,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 497 transitions, 7659 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-05-12 10:39:42,233 INFO L231 Difference]: Finished difference. Result has 378 places, 471 transitions, 6741 flow [2024-05-12 10:39:42,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6741, PETRI_PLACES=378, PETRI_TRANSITIONS=471} [2024-05-12 10:39:42,234 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 327 predicate places. [2024-05-12 10:39:42,234 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 471 transitions, 6741 flow [2024-05-12 10:39:42,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:42,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:42,234 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 10:39:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:39:42,234 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 10:39:42,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1899662681, now seen corresponding path program 12 times [2024-05-12 10:39:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664039063] [2024-05-12 10:39:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:42,542 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 10:39:42,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:42,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664039063] [2024-05-12 10:39:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664039063] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:42,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467880987] [2024-05-12 10:39:42,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:42,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:42,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:42,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 471 transitions, 6741 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:42,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:42,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:42,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:44,475 INFO L124 PetriNetUnfolderBase]: 6327/10788 cut-off events. [2024-05-12 10:39:44,476 INFO L125 PetriNetUnfolderBase]: For 502977/503060 co-relation queries the response was YES. [2024-05-12 10:39:44,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64999 conditions, 10788 events. 6327/10788 cut-off events. For 502977/503060 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 84527 event pairs, 2135 based on Foata normal form. 7/10323 useless extension candidates. Maximal degree in co-relation 64837. Up to 9574 conditions per place. [2024-05-12 10:39:44,648 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 425 selfloop transitions, 49 changer transitions 0/488 dead transitions. [2024-05-12 10:39:44,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 488 transitions, 7731 flow [2024-05-12 10:39:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:39:44,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:39:44,649 INFO L175 Difference]: Start difference. First operand has 378 places, 471 transitions, 6741 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:39:44,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 488 transitions, 7731 flow [2024-05-12 10:39:48,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 488 transitions, 7381 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:48,609 INFO L231 Difference]: Finished difference. Result has 377 places, 471 transitions, 6503 flow [2024-05-12 10:39:48,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6391, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6503, PETRI_PLACES=377, PETRI_TRANSITIONS=471} [2024-05-12 10:39:48,609 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 326 predicate places. [2024-05-12 10:39:48,610 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 471 transitions, 6503 flow [2024-05-12 10:39:48,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:48,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:48,610 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 10:39:48,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:39:48,610 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 10:39:48,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2088970401, now seen corresponding path program 9 times [2024-05-12 10:39:48,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:48,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201303539] [2024-05-12 10:39:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:48,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201303539] [2024-05-12 10:39:48,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201303539] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:48,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:48,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467173141] [2024-05-12 10:39:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:48,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:48,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 471 transitions, 6503 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:48,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:48,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:50,906 INFO L124 PetriNetUnfolderBase]: 6324/10756 cut-off events. [2024-05-12 10:39:50,906 INFO L125 PetriNetUnfolderBase]: For 498133/498212 co-relation queries the response was YES. [2024-05-12 10:39:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64520 conditions, 10756 events. 6324/10756 cut-off events. For 498133/498212 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 84013 event pairs, 2117 based on Foata normal form. 1/10277 useless extension candidates. Maximal degree in co-relation 64358. Up to 9384 conditions per place. [2024-05-12 10:39:51,056 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 359 selfloop transitions, 125 changer transitions 0/498 dead transitions. [2024-05-12 10:39:51,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 498 transitions, 7539 flow [2024-05-12 10:39:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:39:51,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:39:51,057 INFO L175 Difference]: Start difference. First operand has 377 places, 471 transitions, 6503 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:39:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 498 transitions, 7539 flow [2024-05-12 10:39:54,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 498 transitions, 7414 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:54,370 INFO L231 Difference]: Finished difference. Result has 379 places, 471 transitions, 6647 flow [2024-05-12 10:39:54,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6647, PETRI_PLACES=379, PETRI_TRANSITIONS=471} [2024-05-12 10:39:54,370 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 328 predicate places. [2024-05-12 10:39:54,370 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 471 transitions, 6647 flow [2024-05-12 10:39:54,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:54,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:54,370 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 10:39:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:39:54,371 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 10:39:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1309876381, now seen corresponding path program 1 times [2024-05-12 10:39:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:54,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647167105] [2024-05-12 10:39:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:54,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:54,657 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 10:39:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:54,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647167105] [2024-05-12 10:39:54,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647167105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:54,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:54,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759388557] [2024-05-12 10:39:54,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:54,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:54,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:54,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:54,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:39:54,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 471 transitions, 6647 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:54,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:54,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:39:54,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:56,712 INFO L124 PetriNetUnfolderBase]: 6398/11006 cut-off events. [2024-05-12 10:39:56,712 INFO L125 PetriNetUnfolderBase]: For 532411/532495 co-relation queries the response was YES. [2024-05-12 10:39:56,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65571 conditions, 11006 events. 6398/11006 cut-off events. For 532411/532495 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 86956 event pairs, 1884 based on Foata normal form. 15/10549 useless extension candidates. Maximal degree in co-relation 65410. Up to 9125 conditions per place. [2024-05-12 10:39:56,884 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 456 selfloop transitions, 33 changer transitions 0/503 dead transitions. [2024-05-12 10:39:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 503 transitions, 7986 flow [2024-05-12 10:39:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:39:56,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:39:56,885 INFO L175 Difference]: Start difference. First operand has 379 places, 471 transitions, 6647 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:39:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 503 transitions, 7986 flow [2024-05-12 10:39:59,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 503 transitions, 7734 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:59,984 INFO L231 Difference]: Finished difference. Result has 378 places, 474 transitions, 6513 flow [2024-05-12 10:39:59,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6513, PETRI_PLACES=378, PETRI_TRANSITIONS=474} [2024-05-12 10:39:59,984 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 327 predicate places. [2024-05-12 10:39:59,984 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 474 transitions, 6513 flow [2024-05-12 10:39:59,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:59,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:59,985 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 10:39:59,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:39:59,985 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 10:39:59,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1096646879, now seen corresponding path program 2 times [2024-05-12 10:39:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:59,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481001497] [2024-05-12 10:39:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:00,413 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 10:40:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481001497] [2024-05-12 10:40:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481001497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336803603] [2024-05-12 10:40:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:00,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:00,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:00,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 474 transitions, 6513 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:00,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:00,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:00,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:02,675 INFO L124 PetriNetUnfolderBase]: 6385/10987 cut-off events. [2024-05-12 10:40:02,675 INFO L125 PetriNetUnfolderBase]: For 499485/499569 co-relation queries the response was YES. [2024-05-12 10:40:02,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64864 conditions, 10987 events. 6385/10987 cut-off events. For 499485/499569 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 86745 event pairs, 1859 based on Foata normal form. 15/10530 useless extension candidates. Maximal degree in co-relation 64703. Up to 9119 conditions per place. [2024-05-12 10:40:02,824 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 451 selfloop transitions, 33 changer transitions 0/498 dead transitions. [2024-05-12 10:40:02,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 498 transitions, 7609 flow [2024-05-12 10:40:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 10:40:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625531914893617 [2024-05-12 10:40:02,825 INFO L175 Difference]: Start difference. First operand has 378 places, 474 transitions, 6513 flow. Second operand 5 states and 147 transitions. [2024-05-12 10:40:02,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 498 transitions, 7609 flow [2024-05-12 10:40:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 498 transitions, 7529 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:05,395 INFO L231 Difference]: Finished difference. Result has 380 places, 474 transitions, 6505 flow [2024-05-12 10:40:05,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6505, PETRI_PLACES=380, PETRI_TRANSITIONS=474} [2024-05-12 10:40:05,396 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 329 predicate places. [2024-05-12 10:40:05,396 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 474 transitions, 6505 flow [2024-05-12 10:40:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:05,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:05,396 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 10:40:05,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:40:05,396 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 10:40:05,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 126882103, now seen corresponding path program 1 times [2024-05-12 10:40:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520397930] [2024-05-12 10:40:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:05,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520397930] [2024-05-12 10:40:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520397930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:05,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:05,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:05,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113192470] [2024-05-12 10:40:05,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:05,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:05,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:05,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 474 transitions, 6505 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:08,122 INFO L124 PetriNetUnfolderBase]: 6576/11301 cut-off events. [2024-05-12 10:40:08,122 INFO L125 PetriNetUnfolderBase]: For 560833/560969 co-relation queries the response was YES. [2024-05-12 10:40:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68841 conditions, 11301 events. 6576/11301 cut-off events. For 560833/560969 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 89462 event pairs, 2185 based on Foata normal form. 32/10849 useless extension candidates. Maximal degree in co-relation 68680. Up to 9558 conditions per place. [2024-05-12 10:40:08,278 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 367 selfloop transitions, 138 changer transitions 0/519 dead transitions. [2024-05-12 10:40:08,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 519 transitions, 8044 flow [2024-05-12 10:40:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-05-12 10:40:08,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117021276595744 [2024-05-12 10:40:08,279 INFO L175 Difference]: Start difference. First operand has 380 places, 474 transitions, 6505 flow. Second operand 8 states and 230 transitions. [2024-05-12 10:40:08,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 519 transitions, 8044 flow [2024-05-12 10:40:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 519 transitions, 7949 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:11,228 INFO L231 Difference]: Finished difference. Result has 384 places, 482 transitions, 6950 flow [2024-05-12 10:40:11,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6950, PETRI_PLACES=384, PETRI_TRANSITIONS=482} [2024-05-12 10:40:11,228 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 333 predicate places. [2024-05-12 10:40:11,228 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 482 transitions, 6950 flow [2024-05-12 10:40:11,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:11,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:11,228 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 10:40:11,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:40:11,229 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 10:40:11,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1785109115, now seen corresponding path program 2 times [2024-05-12 10:40:11,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:11,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236851793] [2024-05-12 10:40:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:11,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:11,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236851793] [2024-05-12 10:40:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236851793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:11,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:11,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134979346] [2024-05-12 10:40:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:11,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:11,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:11,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:11,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 482 transitions, 6950 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:11,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:11,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:11,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:13,934 INFO L124 PetriNetUnfolderBase]: 6571/11234 cut-off events. [2024-05-12 10:40:13,934 INFO L125 PetriNetUnfolderBase]: For 554686/554825 co-relation queries the response was YES. [2024-05-12 10:40:14,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69037 conditions, 11234 events. 6571/11234 cut-off events. For 554686/554825 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 88722 event pairs, 2227 based on Foata normal form. 32/10783 useless extension candidates. Maximal degree in co-relation 68875. Up to 9736 conditions per place. [2024-05-12 10:40:14,090 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 364 selfloop transitions, 131 changer transitions 0/509 dead transitions. [2024-05-12 10:40:14,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 509 transitions, 8010 flow [2024-05-12 10:40:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:40:14,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:40:14,091 INFO L175 Difference]: Start difference. First operand has 384 places, 482 transitions, 6950 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:40:14,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 509 transitions, 8010 flow [2024-05-12 10:40:18,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 509 transitions, 7709 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:18,173 INFO L231 Difference]: Finished difference. Result has 387 places, 482 transitions, 6916 flow [2024-05-12 10:40:18,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6649, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6916, PETRI_PLACES=387, PETRI_TRANSITIONS=482} [2024-05-12 10:40:18,173 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 336 predicate places. [2024-05-12 10:40:18,173 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 482 transitions, 6916 flow [2024-05-12 10:40:18,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:18,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:40:18,174 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 10:40:18,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash -630480635, now seen corresponding path program 3 times [2024-05-12 10:40:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149855828] [2024-05-12 10:40:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149855828] [2024-05-12 10:40:18,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149855828] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:18,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:18,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604805006] [2024-05-12 10:40:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:18,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:18,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 482 transitions, 6916 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:18,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:20,863 INFO L124 PetriNetUnfolderBase]: 6566/11218 cut-off events. [2024-05-12 10:40:20,863 INFO L125 PetriNetUnfolderBase]: For 555844/555972 co-relation queries the response was YES. [2024-05-12 10:40:20,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68578 conditions, 11218 events. 6566/11218 cut-off events. For 555844/555972 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 88440 event pairs, 2200 based on Foata normal form. 31/10764 useless extension candidates. Maximal degree in co-relation 68415. Up to 9885 conditions per place. [2024-05-12 10:40:21,032 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 428 selfloop transitions, 64 changer transitions 0/506 dead transitions. [2024-05-12 10:40:21,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 506 transitions, 7962 flow [2024-05-12 10:40:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:40:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:40:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:40:21,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-05-12 10:40:21,033 INFO L175 Difference]: Start difference. First operand has 387 places, 482 transitions, 6916 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:40:21,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 506 transitions, 7962 flow [2024-05-12 10:40:24,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 506 transitions, 7663 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:24,611 INFO L231 Difference]: Finished difference. Result has 389 places, 482 transitions, 6750 flow [2024-05-12 10:40:24,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6617, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6750, PETRI_PLACES=389, PETRI_TRANSITIONS=482} [2024-05-12 10:40:24,612 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 338 predicate places. [2024-05-12 10:40:24,612 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 482 transitions, 6750 flow [2024-05-12 10:40:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:24,612 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 10:40:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:40:24,612 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 10:40:24,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2089185541, now seen corresponding path program 4 times [2024-05-12 10:40:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:24,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227790118] [2024-05-12 10:40:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:24,874 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 10:40:24,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227790118] [2024-05-12 10:40:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227790118] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:24,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:24,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133850430] [2024-05-12 10:40:24,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:24,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:24,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:24,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:24,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 482 transitions, 6750 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:24,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:24,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:27,209 INFO L124 PetriNetUnfolderBase]: 6587/11259 cut-off events. [2024-05-12 10:40:27,210 INFO L125 PetriNetUnfolderBase]: For 564670/564799 co-relation queries the response was YES. [2024-05-12 10:40:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68662 conditions, 11259 events. 6587/11259 cut-off events. For 564670/564799 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 88945 event pairs, 2209 based on Foata normal form. 31/10801 useless extension candidates. Maximal degree in co-relation 68498. Up to 9910 conditions per place. [2024-05-12 10:40:27,370 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 422 selfloop transitions, 70 changer transitions 0/506 dead transitions. [2024-05-12 10:40:27,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 506 transitions, 7857 flow [2024-05-12 10:40:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 10:40:27,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-05-12 10:40:27,371 INFO L175 Difference]: Start difference. First operand has 389 places, 482 transitions, 6750 flow. Second operand 9 states and 230 transitions. [2024-05-12 10:40:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 506 transitions, 7857 flow [2024-05-12 10:40:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 506 transitions, 7690 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:30,984 INFO L231 Difference]: Finished difference. Result has 392 places, 484 transitions, 6799 flow [2024-05-12 10:40:30,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6799, PETRI_PLACES=392, PETRI_TRANSITIONS=484} [2024-05-12 10:40:30,984 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 341 predicate places. [2024-05-12 10:40:30,984 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 484 transitions, 6799 flow [2024-05-12 10:40:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:30,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:30,984 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 10:40:30,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:40:30,985 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 10:40:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1824363899, now seen corresponding path program 13 times [2024-05-12 10:40:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425118122] [2024-05-12 10:40:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:31,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425118122] [2024-05-12 10:40:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425118122] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:31,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252406724] [2024-05-12 10:40:31,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:31,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:31,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:31,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:31,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 484 transitions, 6799 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:31,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:31,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:31,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:33,669 INFO L124 PetriNetUnfolderBase]: 6626/11264 cut-off events. [2024-05-12 10:40:33,669 INFO L125 PetriNetUnfolderBase]: For 584167/584249 co-relation queries the response was YES. [2024-05-12 10:40:33,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69352 conditions, 11264 events. 6626/11264 cut-off events. For 584167/584249 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 88455 event pairs, 2187 based on Foata normal form. 1/10753 useless extension candidates. Maximal degree in co-relation 69187. Up to 9546 conditions per place. [2024-05-12 10:40:34,006 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 309 selfloop transitions, 205 changer transitions 0/528 dead transitions. [2024-05-12 10:40:34,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 528 transitions, 8466 flow [2024-05-12 10:40:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:40:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:40:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-05-12 10:40:34,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787234042553191 [2024-05-12 10:40:34,007 INFO L175 Difference]: Start difference. First operand has 392 places, 484 transitions, 6799 flow. Second operand 10 states and 272 transitions. [2024-05-12 10:40:34,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 528 transitions, 8466 flow [2024-05-12 10:40:37,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 8277 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:37,356 INFO L231 Difference]: Finished difference. Result has 396 places, 494 transitions, 7289 flow [2024-05-12 10:40:37,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7289, PETRI_PLACES=396, PETRI_TRANSITIONS=494} [2024-05-12 10:40:37,356 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 345 predicate places. [2024-05-12 10:40:37,356 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 494 transitions, 7289 flow [2024-05-12 10:40:37,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:37,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:37,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:40:37,357 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 10:40:37,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 370903365, now seen corresponding path program 14 times [2024-05-12 10:40:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:37,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986592003] [2024-05-12 10:40:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:37,705 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 10:40:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986592003] [2024-05-12 10:40:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986592003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:37,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:37,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080244807] [2024-05-12 10:40:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:37,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:37,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:37,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 494 transitions, 7289 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:37,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:37,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:40,086 INFO L124 PetriNetUnfolderBase]: 6633/11270 cut-off events. [2024-05-12 10:40:40,086 INFO L125 PetriNetUnfolderBase]: For 595271/595353 co-relation queries the response was YES. [2024-05-12 10:40:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70067 conditions, 11270 events. 6633/11270 cut-off events. For 595271/595353 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 88559 event pairs, 2178 based on Foata normal form. 1/10757 useless extension candidates. Maximal degree in co-relation 69900. Up to 9431 conditions per place. [2024-05-12 10:40:40,243 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 269 selfloop transitions, 257 changer transitions 0/540 dead transitions. [2024-05-12 10:40:40,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 540 transitions, 8895 flow [2024-05-12 10:40:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:40:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:40:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 343 transitions. [2024-05-12 10:40:40,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613747954173486 [2024-05-12 10:40:40,244 INFO L175 Difference]: Start difference. First operand has 396 places, 494 transitions, 7289 flow. Second operand 13 states and 343 transitions. [2024-05-12 10:40:40,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 540 transitions, 8895 flow [2024-05-12 10:40:43,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 540 transitions, 8461 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:43,723 INFO L231 Difference]: Finished difference. Result has 403 places, 497 transitions, 7447 flow [2024-05-12 10:40:43,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7447, PETRI_PLACES=403, PETRI_TRANSITIONS=497} [2024-05-12 10:40:43,723 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 352 predicate places. [2024-05-12 10:40:43,723 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 497 transitions, 7447 flow [2024-05-12 10:40:43,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:43,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:43,723 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 10:40:43,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:40:43,724 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 10:40:43,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1374036545, now seen corresponding path program 15 times [2024-05-12 10:40:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:43,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766484289] [2024-05-12 10:40:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:44,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766484289] [2024-05-12 10:40:44,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766484289] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:44,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:44,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:44,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424008666] [2024-05-12 10:40:44,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:44,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:44,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:44,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 497 transitions, 7447 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:44,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:44,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:46,630 INFO L124 PetriNetUnfolderBase]: 6680/11390 cut-off events. [2024-05-12 10:40:46,630 INFO L125 PetriNetUnfolderBase]: For 624444/624521 co-relation queries the response was YES. [2024-05-12 10:40:46,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71151 conditions, 11390 events. 6680/11390 cut-off events. For 624444/624521 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 89886 event pairs, 2232 based on Foata normal form. 2/10871 useless extension candidates. Maximal degree in co-relation 70983. Up to 9478 conditions per place. [2024-05-12 10:40:46,788 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 269 selfloop transitions, 263 changer transitions 0/546 dead transitions. [2024-05-12 10:40:46,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 546 transitions, 9210 flow [2024-05-12 10:40:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:40:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:40:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 317 transitions. [2024-05-12 10:40:46,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620567375886525 [2024-05-12 10:40:46,789 INFO L175 Difference]: Start difference. First operand has 403 places, 497 transitions, 7447 flow. Second operand 12 states and 317 transitions. [2024-05-12 10:40:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 546 transitions, 9210 flow [2024-05-12 10:40:50,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 546 transitions, 8736 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-05-12 10:40:50,740 INFO L231 Difference]: Finished difference. Result has 405 places, 509 transitions, 7714 flow [2024-05-12 10:40:50,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7714, PETRI_PLACES=405, PETRI_TRANSITIONS=509} [2024-05-12 10:40:50,741 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 354 predicate places. [2024-05-12 10:40:50,741 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 509 transitions, 7714 flow [2024-05-12 10:40:50,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:50,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,741 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 10:40:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:40:50,741 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 10:40:50,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1323426393, now seen corresponding path program 16 times [2024-05-12 10:40:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284240086] [2024-05-12 10:40:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,017 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 10:40:51,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284240086] [2024-05-12 10:40:51,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284240086] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:40:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146294807] [2024-05-12 10:40:51,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:40:51,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:40:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:40:51,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:51,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 509 transitions, 7714 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:51,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:51,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:51,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:53,526 INFO L124 PetriNetUnfolderBase]: 6728/11435 cut-off events. [2024-05-12 10:40:53,526 INFO L125 PetriNetUnfolderBase]: For 651653/651733 co-relation queries the response was YES. [2024-05-12 10:40:53,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72341 conditions, 11435 events. 6728/11435 cut-off events. For 651653/651733 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 89833 event pairs, 2205 based on Foata normal form. 1/10900 useless extension candidates. Maximal degree in co-relation 72172. Up to 9520 conditions per place. [2024-05-12 10:40:53,690 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 284 selfloop transitions, 270 changer transitions 0/568 dead transitions. [2024-05-12 10:40:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 568 transitions, 9965 flow [2024-05-12 10:40:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:40:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:40:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 332 transitions. [2024-05-12 10:40:53,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-05-12 10:40:53,692 INFO L175 Difference]: Start difference. First operand has 405 places, 509 transitions, 7714 flow. Second operand 12 states and 332 transitions. [2024-05-12 10:40:53,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 568 transitions, 9965 flow [2024-05-12 10:40:57,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 568 transitions, 9523 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:57,668 INFO L231 Difference]: Finished difference. Result has 409 places, 521 transitions, 8077 flow [2024-05-12 10:40:57,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8077, PETRI_PLACES=409, PETRI_TRANSITIONS=521} [2024-05-12 10:40:57,668 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 358 predicate places. [2024-05-12 10:40:57,668 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 521 transitions, 8077 flow [2024-05-12 10:40:57,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:57,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:57,669 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 10:40:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:40:57,669 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 10:40:57,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1744782505, now seen corresponding path program 17 times [2024-05-12 10:40:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:57,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222561984] [2024-05-12 10:40:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:57,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:57,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:57,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222561984] [2024-05-12 10:40:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222561984] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:57,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:57,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:57,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871696224] [2024-05-12 10:40:57,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:58,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:40:58,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 521 transitions, 8077 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:58,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:58,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:40:58,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:00,611 INFO L124 PetriNetUnfolderBase]: 6725/11456 cut-off events. [2024-05-12 10:41:00,611 INFO L125 PetriNetUnfolderBase]: For 661121/661198 co-relation queries the response was YES. [2024-05-12 10:41:00,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72412 conditions, 11456 events. 6725/11456 cut-off events. For 661121/661198 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 90205 event pairs, 2232 based on Foata normal form. 1/10925 useless extension candidates. Maximal degree in co-relation 72242. Up to 9518 conditions per place. [2024-05-12 10:41:00,775 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 280 selfloop transitions, 274 changer transitions 0/568 dead transitions. [2024-05-12 10:41:00,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 568 transitions, 10125 flow [2024-05-12 10:41:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:41:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:41:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 348 transitions. [2024-05-12 10:41:00,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695581014729951 [2024-05-12 10:41:00,777 INFO L175 Difference]: Start difference. First operand has 409 places, 521 transitions, 8077 flow. Second operand 13 states and 348 transitions. [2024-05-12 10:41:00,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 568 transitions, 10125 flow [2024-05-12 10:41:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 568 transitions, 9576 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:05,244 INFO L231 Difference]: Finished difference. Result has 414 places, 523 transitions, 8136 flow [2024-05-12 10:41:05,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8136, PETRI_PLACES=414, PETRI_TRANSITIONS=523} [2024-05-12 10:41:05,244 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 363 predicate places. [2024-05-12 10:41:05,244 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 523 transitions, 8136 flow [2024-05-12 10:41:05,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:05,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:05,245 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 10:41:05,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:41:05,245 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 10:41:05,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1522728183, now seen corresponding path program 18 times [2024-05-12 10:41:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282218390] [2024-05-12 10:41:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:05,511 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 10:41:05,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:05,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282218390] [2024-05-12 10:41:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282218390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:05,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514744901] [2024-05-12 10:41:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:05,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 523 transitions, 8136 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:08,074 INFO L124 PetriNetUnfolderBase]: 6722/11432 cut-off events. [2024-05-12 10:41:08,075 INFO L125 PetriNetUnfolderBase]: For 667634/667714 co-relation queries the response was YES. [2024-05-12 10:41:08,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72322 conditions, 11432 events. 6722/11432 cut-off events. For 667634/667714 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 89926 event pairs, 2212 based on Foata normal form. 1/10897 useless extension candidates. Maximal degree in co-relation 72151. Up to 9516 conditions per place. [2024-05-12 10:41:08,238 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 279 selfloop transitions, 268 changer transitions 0/561 dead transitions. [2024-05-12 10:41:08,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 561 transitions, 9912 flow [2024-05-12 10:41:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2024-05-12 10:41:08,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936170212765958 [2024-05-12 10:41:08,239 INFO L175 Difference]: Start difference. First operand has 414 places, 523 transitions, 8136 flow. Second operand 10 states and 279 transitions. [2024-05-12 10:41:08,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 561 transitions, 9912 flow [2024-05-12 10:41:12,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 561 transitions, 9341 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-05-12 10:41:12,865 INFO L231 Difference]: Finished difference. Result has 415 places, 523 transitions, 8107 flow [2024-05-12 10:41:12,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7565, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8107, PETRI_PLACES=415, PETRI_TRANSITIONS=523} [2024-05-12 10:41:12,866 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 364 predicate places. [2024-05-12 10:41:12,866 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 523 transitions, 8107 flow [2024-05-12 10:41:12,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:12,866 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 10:41:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:41:12,866 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 10:41:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1739241565, now seen corresponding path program 19 times [2024-05-12 10:41:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575186866] [2024-05-12 10:41:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:13,267 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 10:41:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575186866] [2024-05-12 10:41:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575186866] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:13,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611916221] [2024-05-12 10:41:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:13,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:13,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:13,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 523 transitions, 8107 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:13,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:13,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand